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Windows Analysis Report 97bXaukEWl.exe

Overview

General Information

Sample Name:	97bXaukEWl.exe
Analysis ID:	457852
MD5:	9318cd06a9a0b788dc043a63c97d4fce
SHA1:	a296ea3e1cf6d41f9d059d7d6e5058882b03161a
SHA256:	7ad18b09938d40e8ec342ee6bee6b190a986ffedce7567a638b8d25b4098cb69
Tags:	exeGuLoader
Infos:
Most interesting Screenshot:

Detection

GuLoader

Score:	84
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Found malware configuration

Multi AV Scanner detection for submitted file

Yara detected GuLoader

C2 URLs / IPs found in malware configuration

Contains functionality to detect hardware virtualization (CPUID execution measurement)

Detected RDTSC dummy instruction sequence (likely for instruction hammering)

Found potential dummy code loops (likely to delay analysis)

Tries to detect virtualization through RDTSC time measurements

Abnormal high CPU Usage

Contains functionality for execution timing, often used to detect debuggers

Contains functionality to call native functions

Contains functionality to read the PEB

Detected potential crypto function

PE / OLE file has an invalid certificate

PE file contains strange resources

Program does not show much activity (idle)

Sample file is different than original file name gathered from version info

Uses 32bit PE files

Uses code obfuscation techniques (call, push, ret)

Classification

Process Tree

System is w10x64

97bXaukEWl.exe (PID: 4908 cmdline: 'C:\Users\user\Desktop\97bXaukEWl.exe' MD5: 9318CD06A9A0B788DC043A63C97D4FCE)

cleanup

Malware Configuration

Threatname: GuLoader

{"Payload URL": "https://kinmirai.org/wp-content/bin_NIapfDNXM183.bin"}

Yara Overview

Memory Dumps

Source	Rule	Description	Author	Strings
00000000.00000002.747139743.00000000020A0000.00000040.00000001.sdmp	JoeSecurity_GuLoader_2	Yara detected GuLoader	Joe Security

Sigma Overview

No Sigma rule has matched

Jbx Signature Overview

Click to jump to signature section

Show All Signature Results

AV Detection:

Found malware configuration

Show sources

Source: 00000000.00000002.747139743.00000000020A0000.00000040.00000001.sdmp

Malware Configuration Extractor: GuLoader {"Payload URL": "https://kinmirai.org/wp-content/bin_NIapfDNXM183.bin"}

Multi AV Scanner detection for submitted file

Show sources

Source: 97bXaukEWl.exe	Virustotal: Detection: 24%			Perma Link
Source: 97bXaukEWl.exe	ReversingLabs: Detection: 17%

Source: 97bXaukEWl.exe

Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

Source:	Binary string: C:\Program Files (x86)\Administrator-Cloud\Projects\bayrerss.pdb source: 97bXaukEWl.exe
Source:	Binary string: C:\Program Files (x86)\Administrator-Cloud\Projects\bayrerss.pdb source: 97bXaukEWl.exe

Networking:

C2 URLs / IPs found in malware configuration

Show sources

Source: Malware configuration extractor

URLs: https://kinmirai.org/wp-content/bin_NIapfDNXM183.bin

Source: 97bXaukEWl.exe	String found in binary or memory: http://cacerts.digicert.com/DigiCertAssuredIDRootCA.crt0
Source: 97bXaukEWl.exe	String found in binary or memory: http://cacerts.digicert.com/DigiCertSHA2AssuredIDTimestampingCA.crt0
Source: 97bXaukEWl.exe	String found in binary or memory: http://crl3.digicert.com/DigiCertAssuredIDRootCA.crl0P
Source: 97bXaukEWl.exe	String found in binary or memory: http://crl3.digicert.com/sha2-assured-ts.crl02
Source: 97bXaukEWl.exe	String found in binary or memory: http://crl4.digicert.com/DigiCertAssuredIDRootCA.crl0:
Source: 97bXaukEWl.exe	String found in binary or memory: http://crl4.digicert.com/sha2-assured-ts.crl0
Source: 97bXaukEWl.exe	String found in binary or memory: http://ocsp.digicert.com0C
Source: 97bXaukEWl.exe	String found in binary or memory: http://ocsp.digicert.com0O
Source: 97bXaukEWl.exe	String found in binary or memory: http://www.digicert.com/CPS0
Source: 97bXaukEWl.exe	String found in binary or memory: https://www.digicert.com/CPS0

Source: C:\Users\user\Desktop\97bXaukEWl.exe

Process Stats: CPU usage > 98%

Source: C:\Users\user\Desktop\97bXaukEWl.exe

Code function: 0_2_020A5798 NtAllocateVirtualMemory,

Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A5798
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A7A0B
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A2655
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A4AAA
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A46B8
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A9AB9
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A4ADA
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A433C
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A7B34
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A8F4F
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A8F5C
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A3BB6
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A83CF
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A73CC
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A7BDB
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A8FD6
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A1BF9
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A1BF7
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A7C0D
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A7C02
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A4021
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A9058
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A245F
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A4050
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A2877
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A489B
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A90D7
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A4CF4
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A3D14
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A792B
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A352B
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A554D
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A796F
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A916F
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A39D7

Source: 97bXaukEWl.exe

Static PE information: invalid certificate

Source: 97bXaukEWl.exe	Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
Source: 97bXaukEWl.exe	Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
Source: 97bXaukEWl.exe	Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST

Source: 97bXaukEWl.exe, 00000000.00000000.221378124.0000000000436000.00000002.00020000.sdmp	Binary or memory string: OriginalFilenamebayrerss.exe vs 97bXaukEWl.exe
Source: 97bXaukEWl.exe, 00000000.00000002.750338858.0000000002960000.00000004.00000001.sdmp	Binary or memory string: OriginalFilenamebayrerss.exeFE2X vs 97bXaukEWl.exe
Source: 97bXaukEWl.exe	Binary or memory string: OriginalFilenamebayrerss.exe vs 97bXaukEWl.exe

Source: 97bXaukEWl.exe

Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

Source: classification engine

Classification label: mal84.troj.evad.winEXE@1/0@0/0

Source: 97bXaukEWl.exe

Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ

Source: C:\Users\user\Desktop\97bXaukEWl.exe

Section loaded: C:\Windows\SysWOW64\msvbvm60.dll

Source: C:\Users\user\Desktop\97bXaukEWl.exe

Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers

Source: 97bXaukEWl.exe	Virustotal: Detection: 24%
Source: 97bXaukEWl.exe	ReversingLabs: Detection: 17%

Source: 97bXaukEWl.exe

Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_DEBUG

Source:	Binary string: C:\Program Files (x86)\Administrator-Cloud\Projects\bayrerss.pdb source: 97bXaukEWl.exe
Source:	Binary string: C:\Program Files (x86)\Administrator-Cloud\Projects\bayrerss.pdb source: 97bXaukEWl.exe

Data Obfuscation:

Yara detected GuLoader

Show sources

Source: Yara match

File source: 00000000.00000002.747139743.00000000020A0000.00000040.00000001.sdmp, type: MEMORY

Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_00421041 push ss; retf
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_00422433 push eax; iretd
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_004200E2 push eax; iretd
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_004210A8 push ebx; retf
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_00421D79 pushfd ; iretd
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_00405D8C push eax; retf
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_004223E5 push eax; iretd
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A2F61 push esi; ret
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A8391 push edx; ret
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A83B8 push edx; ret
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A0FFD push ebx; iretd
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A540E pushad ; retf

Source: C:\Users\user\Desktop\97bXaukEWl.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Process information set: NOOPENFILEERRORBOX

Malware Analysis System Evasion:

Contains functionality to detect hardware virtualization (CPUID execution measurement)

Show sources

Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A5798 NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A3714
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A433C
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A3BB6
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A73CC
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A245F
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A4050
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A352B

Detected RDTSC dummy instruction sequence (likely for instruction hammering)

Show sources

Source: C:\Users\user\Desktop\97bXaukEWl.exe	RDTSC instruction interceptor: First address: 00000000020A6EEA second address: 00000000020A73F6 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a add eax, FF6DF465h 0x0000000f add eax, 051D0E23h 0x00000014 cmp ch, FFFFFF9Bh 0x00000017 add eax, BB406732h 0x0000001c push ss 0x0000001d pop ss 0x0000001e jmp 00007F7BD0B3E4A3h 0x00000020 cmp dword ptr [ebp+0000024Eh], eax 0x00000026 mov eax, dword ptr [ebp+0000024Eh] 0x0000002c jne 00007F7BD0B3E548h 0x00000032 pushad 0x00000033 mov bl, 77h 0x00000035 cmp bl, 00000077h 0x00000038 jne 00007F7BD0B40B02h 0x0000003e popad 0x0000003f push 7DDA0CB7h 0x00000044 call 00007F7BD0B3E8FAh 0x00000049 mov eax, dword ptr fs:[00000030h] 0x0000004f mov eax, dword ptr [eax+0Ch] 0x00000052 test cx, ax 0x00000055 mov eax, dword ptr [eax+14h] 0x00000058 mov ecx, dword ptr [eax] 0x0000005a pushad 0x0000005b mov bx, 12CFh 0x0000005f cmp bx, 12CFh 0x00000064 jne 00007F7BD0B376F3h 0x0000006a popad 0x0000006b mov eax, ecx 0x0000006d cmp dh, ah 0x0000006f jmp 00007F7BD0B3E4A6h 0x00000071 test bh, bh 0x00000073 mov ebx, dword ptr [eax+28h] 0x00000076 test bl, dl 0x00000078 mov dword ptr [ebp+00000238h], edx 0x0000007e pushad 0x0000007f lfence 0x00000082 rdtsc
Source: C:\Users\user\Desktop\97bXaukEWl.exe	RDTSC instruction interceptor: First address: 00000000020A92DD second address: 00000000020A92DD instructions:

Tries to detect virtualization through RDTSC time measurements

Show sources

Source: C:\Users\user\Desktop\97bXaukEWl.exe	RDTSC instruction interceptor: First address: 00000000020A6EEA second address: 00000000020A73F6 instructions: 0x00000000 rdtsc 0x00000002 mov eax, 00000001h 0x00000007 cpuid 0x00000009 popad 0x0000000a add eax, FF6DF465h 0x0000000f add eax, 051D0E23h 0x00000014 cmp ch, FFFFFF9Bh 0x00000017 add eax, BB406732h 0x0000001c push ss 0x0000001d pop ss 0x0000001e jmp 00007F7BD0B3E4A3h 0x00000020 cmp dword ptr [ebp+0000024Eh], eax 0x00000026 mov eax, dword ptr [ebp+0000024Eh] 0x0000002c jne 00007F7BD0B3E548h 0x00000032 pushad 0x00000033 mov bl, 77h 0x00000035 cmp bl, 00000077h 0x00000038 jne 00007F7BD0B40B02h 0x0000003e popad 0x0000003f push 7DDA0CB7h 0x00000044 call 00007F7BD0B3E8FAh 0x00000049 mov eax, dword ptr fs:[00000030h] 0x0000004f mov eax, dword ptr [eax+0Ch] 0x00000052 test cx, ax 0x00000055 mov eax, dword ptr [eax+14h] 0x00000058 mov ecx, dword ptr [eax] 0x0000005a pushad 0x0000005b mov bx, 12CFh 0x0000005f cmp bx, 12CFh 0x00000064 jne 00007F7BD0B376F3h 0x0000006a popad 0x0000006b mov eax, ecx 0x0000006d cmp dh, ah 0x0000006f jmp 00007F7BD0B3E4A6h 0x00000071 test bh, bh 0x00000073 mov ebx, dword ptr [eax+28h] 0x00000076 test bl, dl 0x00000078 mov dword ptr [ebp+00000238h], edx 0x0000007e pushad 0x0000007f lfence 0x00000082 rdtsc
Source: C:\Users\user\Desktop\97bXaukEWl.exe	RDTSC instruction interceptor: First address: 00000000020A73F6 second address: 00000000020A74C0 instructions: 0x00000000 rdtsc 0x00000002 lfence 0x00000005 shl edx, 20h 0x00000008 or edx, eax 0x0000000a popad 0x0000000b mov edx, 2A63ED14h 0x00000010 cmp ax, dx 0x00000013 xor edx, 8CD6B9A0h 0x00000019 xor edx, 8DA3C863h 0x0000001f cmp eax, ecx 0x00000021 sub edx, 2B169CD7h 0x00000027 test ebx, E044EBDBh 0x0000002d cmp ebx, edx 0x0000002f mov edx, dword ptr [ebp+00000238h] 0x00000035 je 00007F7BD0AEA8D8h 0x0000003b fnop 0x0000003d mov dword ptr [ebp+00000222h], eax 0x00000043 pushad 0x00000044 mov bh, 9Ah 0x00000046 cmp bh, FFFFFF9Ah 0x00000049 jne 00007F7BD0AE7432h 0x0000004f popad 0x00000050 mov eax, ebx 0x00000052 push eax 0x00000053 mov eax, dword ptr [ebp+00000222h] 0x00000059 test dl, 0000005Ah 0x0000005c cmp cx, dx 0x0000005f call 00007F7BD0AEA8B7h 0x00000064 pushad 0x00000065 lfence 0x00000068 rdtsc
Source: C:\Users\user\Desktop\97bXaukEWl.exe	RDTSC instruction interceptor: First address: 00000000020A58DE second address: 00000000020A593B instructions: 0x00000000 rdtsc 0x00000002 popad 0x00000003 sub dword ptr [esp], F2A63F26h 0x0000000a test bx, ax 0x0000000d xor dword ptr [esp], 1168D9BEh 0x00000014 mov dword ptr [ebp+00000148h], 00000000h 0x0000001e add ebx, 04h 0x00000021 mov dword ptr [ebp+0000018Bh], esi 0x00000027 mov esi, ebx 0x00000029 push esi 0x0000002a mov esi, dword ptr [ebp+0000018Bh] 0x00000030 cmp ch, dh 0x00000032 mov dword ptr [ebp+000001E4h], ecx 0x00000038 mov ecx, 785B2C8Ch 0x0000003d test ebx, eax 0x0000003f test bx, bx 0x00000042 xor ecx, C683D913h 0x00000048 cmp dl, 00000035h 0x0000004b add ecx, 3D510807h 0x00000051 sub ecx, FC29FDA7h 0x00000057 pushad 0x00000058 mov esi, 00000084h 0x0000005d rdtsc
Source: C:\Users\user\Desktop\97bXaukEWl.exe	RDTSC instruction interceptor: First address: 00000000020A92DD second address: 00000000020A92DD instructions:

Source: C:\Users\user\Desktop\97bXaukEWl.exe

Code function: 0_2_020A5798 rdtsc

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Anti Debugging:

Found potential dummy code loops (likely to delay analysis)

Show sources

Source: C:\Users\user\Desktop\97bXaukEWl.exe

Process Stats: CPU usage > 90% for more than 60s

Source: C:\Users\user\Desktop\97bXaukEWl.exe

Code function: 0_2_020A5798 rdtsc

Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A6E4F mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\97bXaukEWl.exe	Code function: 0_2_020A352B mov eax, dword ptr fs:[00000030h]

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Source: 97bXaukEWl.exe, 00000000.00000002.746784171.0000000000C60000.00000002.00000001.sdmp	Binary or memory string: Program Manager
Source: 97bXaukEWl.exe, 00000000.00000002.746784171.0000000000C60000.00000002.00000001.sdmp	Binary or memory string: Shell_TrayWnd
Source: 97bXaukEWl.exe, 00000000.00000002.746784171.0000000000C60000.00000002.00000001.sdmp	Binary or memory string: Progman
Source: 97bXaukEWl.exe, 00000000.00000002.746784171.0000000000C60000.00000002.00000001.sdmp	Binary or memory string: Progmanlock

Mitre Att&ck Matrix

Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Exfiltration	Command and Control	Network Effects	Remote Service Effects	Impact
Valid Accounts	Windows Management Instrumentation	Path Interception	Process Injection1	Virtualization/Sandbox Evasion11	OS Credential Dumping	Security Software Discovery41	Remote Services	Archive Collected Data1	Exfiltration Over Other Network Medium	Encrypted Channel1	Eavesdrop on Insecure Network Communication	Remotely Track Device Without Authorization	Modify System Partition
Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	Process Injection1	LSASS Memory	Virtualization/Sandbox Evasion11	Remote Desktop Protocol	Data from Removable Media	Exfiltration Over Bluetooth	Application Layer Protocol1	Exploit SS7 to Redirect Phone Calls/SMS	Remotely Wipe Data Without Authorization	Device Lockout
Domain Accounts	At (Linux)	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information1	Security Account Manager	Process Discovery1	SMB/Windows Admin Shares	Data from Network Shared Drive	Automated Exfiltration	Steganography	Exploit SS7 to Track Device Location	Obtain Device Cloud Backups	Delete Device Data
Local Accounts	At (Windows)	Logon Script (Mac)	Logon Script (Mac)	Binary Padding	NTDS	System Information Discovery31	Distributed Component Object Model	Input Capture	Scheduled Transfer	Protocol Impersonation	SIM Card Swap		Carrier Billing Fraud

Behavior Graph

Hide Legend

Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Is Windows Process
Number of created Registry Values
Number of created Files
Visual Basic
Delphi
Java
.Net C# or VB.NET
C, C++ or other language
Is malicious
Internet

Screenshots

Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
97bXaukEWl.exe	24%	Virustotal		Browse
97bXaukEWl.exe	17%	ReversingLabs	Win32.Infostealer.Generic

Dropped Files

No Antivirus matches

Unpacked PE Files

No Antivirus matches

Domains

No Antivirus matches

URLs

Source	Detection	Scanner	Label	Link
https://kinmirai.org/wp-content/bin_NIapfDNXM183.bin	0%	Avira URL Cloud	safe

Domains and IPs

Contacted Domains

No contacted domains info

Contacted URLs

Name	Malicious	Antivirus Detection	Reputation
https://kinmirai.org/wp-content/bin_NIapfDNXM183.bin	true	Avira URL Cloud: safe	unknown

Contacted IPs

No contacted IP infos

General Information

Joe Sandbox Version:	33.0.0 White Diamond
Analysis ID:	457852
Start date:	02.08.2021
Start time:	11:51:41
Joe Sandbox Product:	CloudBasic
Overall analysis duration:	0h 7m 42s
Hypervisor based Inspection enabled:	false
Report type:	light
Sample file name:	97bXaukEWl.exe
Cookbook file name:	default.jbs
Analysis system description:	Windows 10 64 bit v1803 with Office Professional Plus 2016, Chrome 85, IE 11, Adobe Reader DC 19, Java 8 Update 211
Number of analysed new started processes analysed:	39
Number of new started drivers analysed:	0
Number of existing processes analysed:	0
Number of existing drivers analysed:	0
Number of injected processes analysed:	0
Technologies:	HCA enabled EGA enabled HDC enabled AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Detection:	MAL
Classification:	mal84.troj.evad.winEXE@1/0@0/0
EGA Information:	Failed
HDC Information:	Successful, ratio: 0.4% (good quality ratio 0.4%) Quality average: 55.3% Quality standard deviation: 9.3%
HCA Information:	Failed
Cookbook Comments:	Adjust boot time Enable AMSI Found application associated with file extension: .exe Override analysis time to 240s for sample files taking high CPU consumption
Warnings:	Show All Exclude process from analysis (whitelisted): MpCmdRun.exe, RuntimeBroker.exe, wermgr.exe, backgroundTaskHost.exe, UsoClient.exe, audiodg.exe, BackgroundTransferHost.exe, WMIADAP.exe, SgrmBroker.exe, conhost.exe, svchost.exe, wuapihost.exe Not all processes where analyzed, report is missing behavior information

Simulations

Behavior and APIs

No simulations

Joe Sandbox View / Context

IPs

No context

Domains

No context

ASN

No context

JA3 Fingerprints

No context

Dropped Files

No context

Created / dropped Files

No created / dropped files found

Static File Info

General
File type:	PE32 executable (GUI) Intel 80386, for MS Windows
Entropy (8bit):	4.6012516392465255
TrID:	Win32 Executable (generic) a (10002005/4) 99.15% Win32 Executable Microsoft Visual Basic 6 (82127/2) 0.81% Generic Win/DOS Executable (2004/3) 0.02% DOS Executable Generic (2002/1) 0.02% Autodesk FLIC Image File (extensions: flc, fli, cel) (7/3) 0.00%
File name:	97bXaukEWl.exe
File size:	259192
MD5:	9318cd06a9a0b788dc043a63c97d4fce
SHA1:	a296ea3e1cf6d41f9d059d7d6e5058882b03161a
SHA256:	7ad18b09938d40e8ec342ee6bee6b190a986ffedce7567a638b8d25b4098cb69
SHA512:	da057bf10d5a7ae8863dd0310b3d4116af6535aacc68074c9c301e79f580860c2cecba991628d274d62e029ee210f92705c12125dc390072556ca031a16cd4b3
SSDEEP:	1536:2blgLWMXncWYqmOeDA6W6h8eaBWTvYeigJ2cI6wt:NLWMXntzVAA6W6GwZJgt
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$.........y.....................................Rich............PE..L.....zY.................@...................P....@................

File Icon


Icon Hash:	e8cccece8ececc68

Static PE Info

General
Entrypoint:	0x401388
Entrypoint Section:	.text
Digitally signed:	true
Imagebase:	0x400000
Subsystem:	windows gui
Image File Characteristics:	LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
DLL Characteristics:
Time Stamp:	0x597AB081 [Fri Jul 28 03:33:21 2017 UTC]
TLS Callbacks:
CLR (.Net) Version:
OS Version Major:	4
OS Version Minor:	0
File Version Major:	4
File Version Minor:	0
Subsystem Version Major:	4
Subsystem Version Minor:	0
Import Hash:	c75b2cceb55bee276cddf57134b154d2

Authenticode Signature

Signature Valid:	false
Signature Issuer:	E=Andreyg5@anaerobi.Pr, CN=ANSTNDI, OU=COLOROTO, O=krem, L=Toker, S=Skuffels5, C=PG
Signature Validation Error:	A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider
Error Number:	-2146762487
Not Before, Not After	8/1/2021 1:24:20 PM 8/1/2022 1:24:20 PM
Subject Chain	E=Andreyg5@anaerobi.Pr, CN=ANSTNDI, OU=COLOROTO, O=krem, L=Toker, S=Skuffels5, C=PG
Version:	3
Thumbprint MD5:	5F240938C81B57F5F43DD818766923DB
Thumbprint SHA-1:	D39BA4A993AF1C3AF864520F7A5E572CFBAF3C4A
Thumbprint SHA-256:	98F39CD1A5C825C14DA71726F851E1712E5FD89B52C590FC4D1763D249A25976
Serial:	00

Entrypoint Preview

Instruction
push 004311CCh
call 00007F7BD0E69C95h
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
xor byte ptr [eax], al
add byte ptr [eax], al
cmp byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
dec edi
mov eax, dword ptr [1781393Ch]
imul ecx, dword ptr [edi-70h], CC0C945Fh
cmpsb
push ds
mov ah, 00h
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [ecx], al
add byte ptr [eax], al
add byte ptr [ecx+00h], al
xchg byte ptr [eax-7Eh], dl
add dword ptr [ecx+73h], ebp
jc 00007F7BD0E69CA3h
add al, byte ptr [eax]
add byte ptr [eax], al
add bh, bh
int3
xor dword ptr [eax], eax
pop ss
mov ah, CBh
salc
push edi
mov dl, al
pop edx
inc edi
test eax, 3D345146h
mov dword ptr [D5F49639h], eax
mov ss, word ptr [edi-16h]
xchg eax, edi
outsd
inc ebp
xchg eax, edi
jnp 00007F7BD0E69D0Eh
imul edx, eax, 3AB8B9ACh
dec edi
lodsd
xor ebx, dword ptr [ecx-48EE309Ah]
or al, 00h
stosb
add byte ptr [eax-2Dh], ah
xchg eax, ebx
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
jnc 00007F7BD0E69C9Eh
add al, byte ptr [eax]
imul eax, dword ptr [eax], 00h
add byte ptr [ecx], cl
add byte ptr [esi+esi*2+72h], dl
bound ebp, dword ptr [edx+6Ch]
imul esp, dword ptr [ebp+31h], 00h
or eax, 42000A01h
imul esp, dword ptr [edx+65h], 7274736Ch
imul esi, dword ptr [ebx], 00h
sbb dword ptr [ecx], eax

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x34624	0x28	.text
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x36000	0x70f2	.rsrc
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x0	0x0
IMAGE_DIRECTORY_ENTRY_SECURITY	0x3e058	0x1420
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x0	0x0
IMAGE_DIRECTORY_ENTRY_DEBUG	0x1100	0x1c	.text
IMAGE_DIRECTORY_ENTRY_COPYRIGHT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_GLOBALPTR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_TLS	0x0	0x0
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	0x228	0x20
IMAGE_DIRECTORY_ENTRY_IAT	0x1000	0xf4	.text
IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_RESERVED	0x0	0x0

Sections

Name	Virtual Address	Virtual Size	Raw Size	Xored PE	ZLIB Complexity	File Type	Entropy	Characteristics
.text	0x1000	0x33a64	0x34000	False	0.258328951322	data	4.55415043374	IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
.data	0x35000	0xb94	0x1000	False	0.00634765625	data	0.0	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_WRITE, IMAGE_SCN_MEM_READ
.rsrc	0x36000	0x70f2	0x8000	False	0.2998046875	data	4.01130957517	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ

Resources

Name	RVA	Size	Type	Language	Country
RT_ICON	0x3ca8a	0x668	dBase IV DBT of `.DBF, block length 1536, next free block index 40, next free block 4265541880, next used block 7936
RT_ICON	0x3c7a2	0x2e8	data
RT_ICON	0x3c5ba	0x1e8	data
RT_ICON	0x3c492	0x128	GLS_BINARY_LSB_FIRST
RT_ICON	0x3b5ea	0xea8	data
RT_ICON	0x3ad42	0x8a8	data
RT_ICON	0x3a67a	0x6c8	data
RT_ICON	0x3a112	0x568	GLS_BINARY_LSB_FIRST
RT_ICON	0x3846a	0x1ca8	data
RT_ICON	0x38102	0x368	GLS_BINARY_LSB_FIRST
RT_ICON	0x3705a	0x10a8	data
RT_ICON	0x366d2	0x988	data
RT_GROUP_ICON	0x36624	0xae	data
RT_VERSION	0x36300	0x324	data	English	United States

Imports

DLL

Import

MSVBVM60.DLL

_CIcos, _adj_fptan, __vbaFreeVar, __vbaStrVarMove, __vbaFreeVarList, _adj_fdiv_m64, __vbaFreeObjList, _adj_fprem1, __vbaSetSystemError, __vbaHresultCheckObj, _adj_fdiv_m32, __vbaObjSet, _adj_fdiv_m16i, _adj_fdivr_m16i, _CIsin, __vbaChkstk, EVENT_SINK_AddRef, __vbaStrCmp, DllFunctionCall, _adj_fpatan, EVENT_SINK_Release, _CIsqrt, EVENT_SINK_QueryInterface, __vbaExceptHandler, _adj_fprem, _adj_fdivr_m64, __vbaFPException, _CIlog, __vbaNew2, _adj_fdiv_m32i, _adj_fdivr_m32i, __vbaStrCopy, __vbaFreeStrList, _adj_fdivr_m32, _adj_fdiv_r, __vbaVarTstNe, __vbaLateMemCall, __vbaStrToAnsi, __vbaVarDup, __vbaFpI4, _CIatan, __vbaStrMove, __vbaCastObj, _allmul, __vbaLateIdSt, _CItan, _CIexp, __vbaFreeObj, __vbaFreeStr

Version Infos

Description	Data
Translation	0x0409 0x04b0
LegalCopyright	SentinelStack
InternalName	bayrerss
FileVersion	1.00
CompanyName	SentinelStack
LegalTrademarks	SentinelStack
Comments	SentinelStack
ProductName	SentinelStack
ProductVersion	1.00
FileDescription	SentinelStack
OriginalFilename	bayrerss.exe

Possible Origin

Language of compilation system	Country where language is spoken	Map
English	United States

Network Behavior

No network behavior found

Code Manipulations

Statistics

System Behavior

Analysis Process: 97bXaukEWl.exe PID: 4908 Parent PID: 5516

General

Start time:	11:52:38
Start date:	02/08/2021
Path:	C:\Users\user\Desktop\97bXaukEWl.exe
Wow64 process (32bit):	true
Commandline:	'C:\Users\user\Desktop\97bXaukEWl.exe'
Imagebase:	0x400000
File size:	259192 bytes
MD5 hash:	9318CD06A9A0B788DC043A63C97D4FCE
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	Visual Basic
Yara matches:	Rule: JoeSecurity_GuLoader_2, Description: Yara detected GuLoader, Source: 00000000.00000002.747139743.00000000020A0000.00000040.00000001.sdmp, Author: Joe Security
Reputation:	low

Disassembly

Code Analysis

Reset < >

Description:	Adversaries may inject code into processes in order to evade process-based defenses as well as possibly elevate privileges. Process injection is a method of executing arbitrary code in the address space of a separate live process. Running code in the context of another process may allow access to the process's memory, system/network resources, and possibly elevated privileges. Execution via process injection may also evade detection from security products since the execution is masked under a legitimate process.
Tactics:	Defense Evasion, Privilege Escalation
Data Sources:	API monitoring, DLL monitoring, File monitoring, Named Pipes, Process monitoring
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ various means to detect and avoid virtualization and analysis environments. This may include changing behaviors based on the results of checks for the presence of artifacts indicative of a virtual machine environment (VME) or sandbox. If the adversary detects a VME, they may alter their malware to disengage from the victim or conceal the core functions of the implant. They may also search for VME artifacts before dropping secondary or additional payloads. Adversaries may use the information learned from [Virtualization/Sandbox Evasion](https://attack.mitre.org/techniques/T1497) during automated discovery to shape follow-on behaviors.
Tactics:	Defense Evasion, Discovery
Data Sources:	Process command-line parameters, Process monitoring
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Binary file metadata, Email gateway, Environment variable, File monitoring, Malware reverse engineering, Network intrusion detection system, Network protocol analysis, Process command-line parameters, Process monitoring, Process use of network, SSL/TLS inspection, Windows event logs
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	AWS CloudTrail logs, Azure activity logs, File monitoring, Process command-line parameters, Process monitoring, Stackdriver logs
Platforms:	AWS, Azure, Azure AD, GCP, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get information about running processes on a system. Information obtained could be used to gain an understanding of common software/applications running on systems within the network. Adversaries may use the information from Process Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	API monitoring, Process command-line parameters, Process monitoring
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture. Adversaries may use the information from System Information Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	AWS CloudTrail logs, Azure activity logs, Process command-line parameters, Process monitoring, Stackdriver logs
Platforms:	AWS, Azure, GCP, Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	An adversary may compress and/or encrypt data that is collected prior to exfiltration. Compressing the data can help to obfuscate the collected data and minimize the amount of data sent over the network. Encryption can be used to hide information that is being exfiltrated from detection or make exfiltration less conspicuous upon inspection by a defender.
Tactics:	Collection
Data Sources:	Binary file metadata, File monitoring, Process command-line parameters, Process monitoring
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Despite the use of a secure algorithm, these implementations may be vulnerable to reverse engineering if secret keys are encoded and/or generated within malware samples/configuration files.
Tactics:	Command and Control
Data Sources:	Malware reverse engineering, Netflow/Enclave netflow, Packet capture, Process monitoring, Process use of network, SSL/TLS inspection
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Tactics:	Command and Control
Data Sources:	DNS records, Netflow/Enclave netflow, Network protocol analysis, Packet capture, Process monitoring, Process use of network
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Warning!

Windows Analysis Report 97bXaukEWl.exe

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Configuration

Threatname: GuLoader

Yara Overview

Memory Dumps

Sigma Overview

Jbx Signature Overview

AV Detection:

Compliance:

Networking:

System Summary:

Data Obfuscation:

Hooking and other Techniques for Hiding and Protection:

Malware Analysis System Evasion:

Anti Debugging:

HIPS / PFW / Operating System Protection Evasion:

Mitre Att&ck Matrix

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Unpacked PE Files

Domains

URLs

Domains and IPs

Contacted Domains

Contacted URLs

Contacted IPs

General Information

Simulations

Behavior and APIs

Joe Sandbox View / Context

IPs

Domains

ASN

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

File Icon

Static PE Info

General

Authenticode Signature

Entrypoint Preview

Data Directories

Sections

Resources

Imports

Version Infos

Possible Origin

Network Behavior

Code Manipulations

Statistics

System Behavior

Analysis Process: 97bXaukEWl.exe PID: 4908 Parent PID: 5516

General

Disassembly

Code Analysis