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Analysis Report vbc.exe.vir

Overview

General Information

Sample Name:	vbc.exe.vir (renamed file extension from vir to exe)
Analysis ID:	430987
MD5:	788016c9072423914b96f0d15a61812d
SHA1:	040f85b4ef512bb74990becfa1a5029f92eb65c7
SHA256:	df34f3d4030a5ea484108271f749ca5fbc3af0f415051e98b342a505c88971e4
Infos:
Most interesting Screenshot:

Detection

GuLoader

Score:	80
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Found malware configuration

Potential malicious icon found

Yara detected GuLoader

C2 URLs / IPs found in malware configuration

Contains functionality to detect hardware virtualization (CPUID execution measurement)

Found potential dummy code loops (likely to delay analysis)

Tries to detect virtualization through RDTSC time measurements

Abnormal high CPU Usage

Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)

Contains functionality for execution timing, often used to detect debuggers

Contains functionality to call native functions

Contains functionality to query CPU information (cpuid)

Contains functionality to read the PEB

Detected potential crypto function

Found large amount of non-executed APIs

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 w7x64

vbc.exe.exe (PID: 2400 cmdline: 'C:\Users\user\Desktop\vbc.exe.exe' MD5: 788016C9072423914B96F0D15A61812D)

cleanup

Malware Configuration

Threatname: GuLoader

{"Payload URL": "https://bara-seck.com/bin_YIuwAXdc211.bin, https://wizumiya.co.jp/html/user_data/"}

Yara Overview

Initial Sample

Source	Rule	Description	Author	Strings
vbc.exe.exe	JoeSecurity_GuLoader_1	Yara detected GuLoader	Joe Security

Memory Dumps

Source	Rule	Description	Author	Strings
00000000.00000000.2095163938.0000000000401000.00000020.00020000.sdmp	JoeSecurity_GuLoader_1	Yara detected GuLoader	Joe Security
00000000.00000002.3175874940.0000000000401000.00000020.00020000.sdmp	JoeSecurity_GuLoader_1	Yara detected GuLoader	Joe Security

Unpacked PEs

Source	Rule	Description	Author	Strings
0.0.vbc.exe.exe.400000.0.unpack	JoeSecurity_GuLoader_1	Yara detected GuLoader	Joe Security
0.2.vbc.exe.exe.400000.1.unpack	JoeSecurity_GuLoader_1	Yara detected GuLoader	Joe Security

Sigma Overview

No Sigma rule has matched

Signature Overview

Click to jump to signature section

Show All Signature Results

AV Detection:

Found malware configuration

Show sources

Source: vbc.exe.exe

Malware Configuration Extractor: GuLoader {"Payload URL": "https://bara-seck.com/bin_YIuwAXdc211.bin, https://wizumiya.co.jp/html/user_data/"}

Source: vbc.exe.exe

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

Networking:

C2 URLs / IPs found in malware configuration

Show sources

Source: Malware configuration extractor

URLs: https://bara-seck.com/bin_YIuwAXdc211.bin, https://wizumiya.co.jp/html/user_data/

System Summary:

Potential malicious icon found

Show sources

Source: initial sample

Icon embedded in PE file: bad icon match: 20047c7c70f0e004

Source: C:\Users\user\Desktop\vbc.exe.exe

Process Stats: CPU usage > 98%

Source: C:\Users\user\Desktop\vbc.exe.exe	Memory allocated: 76E20000 page execute and read and write
Source: C:\Users\user\Desktop\vbc.exe.exe	Memory allocated: 76D20000 page execute and read and write

Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046699A NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00466C02 NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004669E4 NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004669AE NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00466A34 NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00466AD4 NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00466A99 NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00466B59 NtAllocateVirtualMemory,
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00466BCC NtAllocateVirtualMemory,

Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00405607
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004032F5
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046699A
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464454
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00462452
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046245C
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B45D
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465466
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465069
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464404
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465004
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A814
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B410
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465418
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046582E
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004624C7
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B4E0
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A4F1
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004638FC
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004654FC
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004650F8
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463895
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B493
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A890
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465C99
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004644B2
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004658B8
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464544
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465578
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464910
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046593E
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004659CF
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B5CC
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A5C8
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004645D1
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004669E4
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004639E8
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004651FA
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00469984
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A580
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465181
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464988
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B588
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463189
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004639A0
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004669AE
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463249
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B650
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463A62
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465A68
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465278
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B608
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463209
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A614
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465627
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00466A34
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A2D8
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004692EF
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464EF2
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A6F0
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463AF8
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465688
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B69C
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A6A0
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465B58
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A76C
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00469768
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465302
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463300
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465B08
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465712
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464F1C
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00462F27
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A7C7
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465BE7
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046B3F8
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00465394
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464F98
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004657A5
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004633AC
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004643B8

Source: vbc.exe.exe

Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST

Source: vbc.exe.exe, 00000000.00000002.3175842448.0000000000330000.00000008.00000001.sdmp	Binary or memory string: OriginalFilenameuser32j% vs vbc.exe.exe
Source: vbc.exe.exe, 00000000.00000000.2095192138.0000000000424000.00000002.00020000.sdmp	Binary or memory string: OriginalFilenameSuperintellectually.exe vs vbc.exe.exe
Source: vbc.exe.exe	Binary or memory string: OriginalFilenameSuperintellectually.exe vs vbc.exe.exe

Source: vbc.exe.exe

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

Source: classification engine

Classification label: mal80.rans.troj.evad.winEXE@1/0@0/0

Source: vbc.exe.exe

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

Source: C:\Users\user\Desktop\vbc.exe.exe

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

Source: C:\Users\user\Desktop\vbc.exe.exe

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

Data Obfuscation:

Yara detected GuLoader

Show sources

Source: Yara match	File source: vbc.exe.exe, type: SAMPLE
Source: Yara match	File source: 00000000.00000000.2095163938.0000000000401000.00000020.00020000.sdmp, type: MEMORY
Source: Yara match	File source: 00000000.00000002.3175874940.0000000000401000.00000020.00020000.sdmp, type: MEMORY
Source: Yara match	File source: 0.0.vbc.exe.exe.400000.0.unpack, type: UNPACKEDPE
Source: Yara match	File source: 0.2.vbc.exe.exe.400000.1.unpack, type: UNPACKEDPE

Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00403112 push dword ptr [ebp-44h]; ret
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A965 push eax; ret
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464A3C push AFBDCFF2h; iretd
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00467F05 push edx; ret
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00462B1B push ebp; retf

Source: C:\Users\user\Desktop\vbc.exe.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\vbc.exe.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\vbc.exe.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\vbc.exe.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\vbc.exe.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\vbc.exe.exe	Code function: 0_2_00463895
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046BB26
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046BB2B

Tries to detect virtualization through RDTSC time measurements

Show sources

Source: C:\Users\user\Desktop\vbc.exe.exe

RDTSC instruction interceptor: First address: 0000000000469BBF second address: 0000000000469BBF instructions: 0x00000000 rdtsc 0x00000002 mov eax, 4A1014F8h 0x00000007 xor eax, 91CBACF6h 0x0000000c xor eax, 7F9DE2BDh 0x00000011 xor eax, A4465AB2h 0x00000016 cpuid 0x00000018 popad 0x00000019 call 00007FCE68367844h 0x0000001e lfence 0x00000021 mov edx, C49425E1h 0x00000026 xor edx, 40636495h 0x0000002c sub edx, D2D01692h 0x00000032 xor edx, CDD92AF6h 0x00000038 mov edx, dword ptr [edx] 0x0000003a lfence 0x0000003d jmp 00007FCE68367836h 0x0000003f test al, bl 0x00000041 cmp al, E3h 0x00000043 jmp 00007FCE68367836h 0x00000045 cmp ch, 0000006Dh 0x00000048 cmp bh, ah 0x0000004a ret 0x0000004b sub edx, esi 0x0000004d ret 0x0000004e add edi, edx 0x00000050 dec dword ptr [ebp+000000F8h] 0x00000056 cmp dword ptr [ebp+000000F8h], 00000000h 0x0000005d jne 00007FCE683677B4h 0x0000005f jmp 00007FCE68367836h 0x00000061 test ah, ch 0x00000063 call 00007FCE68367826h 0x00000068 call 00007FCE68367865h 0x0000006d lfence 0x00000070 mov edx, C49425E1h 0x00000075 xor edx, 40636495h 0x0000007b sub edx, D2D01692h 0x00000081 xor edx, CDD92AF6h 0x00000087 mov edx, dword ptr [edx] 0x00000089 lfence 0x0000008c jmp 00007FCE68367836h 0x0000008e test al, bl 0x00000090 cmp al, E3h 0x00000092 jmp 00007FCE68367836h 0x00000094 cmp ch, 0000006Dh 0x00000097 cmp bh, ah 0x00000099 ret 0x0000009a mov esi, edx 0x0000009c pushad 0x0000009d rdtsc

Source: C:\Users\user\Desktop\vbc.exe.exe

Code function: 0_2_00468C4F rdtsc

Source: C:\Users\user\Desktop\vbc.exe.exe

API coverage: 7.0 %

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\vbc.exe.exe

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

Source: C:\Users\user\Desktop\vbc.exe.exe

Code function: 0_2_00468C4F rdtsc

Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00469840 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464454 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00464404 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046642D mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A4F1 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463895 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00468D1F mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A5C8 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A580 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_0046A614 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_004643B8 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\vbc.exe.exe	Code function: 0_2_00463FB8 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: vbc.exe.exe, 00000000.00000002.3175940908.00000000008C0000.00000002.00000001.sdmp	Binary or memory string: Program Manager
Source: vbc.exe.exe, 00000000.00000002.3175940908.00000000008C0000.00000002.00000001.sdmp	Binary or memory string: Shell_TrayWnd
Source: vbc.exe.exe, 00000000.00000002.3175940908.00000000008C0000.00000002.00000001.sdmp	Binary or memory string: !Progman

Source: C:\Users\user\Desktop\vbc.exe.exe

Code function: 0_2_0046BB2B cpuid

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 Discovery31	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 Discovery211	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

No Antivirus matches

Dropped Files

No Antivirus matches

Unpacked PE Files

No Antivirus matches

Domains

No Antivirus matches

URLs

Source	Detection	Scanner	Label	Link
https://bara-seck.com/bin_YIuwAXdc211.bin, https://wizumiya.co.jp/html/user_data/	0%	Avira URL Cloud	safe

Domains and IPs

Contacted Domains

No contacted domains info

Contacted URLs

Name	Malicious	Antivirus Detection	Reputation
https://bara-seck.com/bin_YIuwAXdc211.bin, https://wizumiya.co.jp/html/user_data/	true	Avira URL Cloud: safe	unknown

Contacted IPs

No contacted IP infos

General Information

Joe Sandbox Version:	32.0.0 Black Diamond
Analysis ID:	430987
Start date:	08.06.2021
Start time:	10:11:10
Joe Sandbox Product:	CloudBasic
Overall analysis duration:	0h 11m 46s
Hypervisor based Inspection enabled:	false
Report type:	light
Sample file name:	vbc.exe.vir (renamed file extension from vir to exe)
Cookbook file name:	default.jbs
Analysis system description:	Windows 7 x64 SP1 with Office 2010 SP2 (IE 11, FF52, Chrome 57, Adobe Reader DC 15, Flash 25.0.0.127, Java 8 Update 121, .NET 4.6.2)
Number of analysed new started processes analysed:	2
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:	mal80.rans.troj.evad.winEXE@1/0@0/0
EGA Information:	Successful, ratio: 100%
HDC Information:	Successful, ratio: 15.9% (good quality ratio 5.2%) Quality average: 18% Quality standard deviation: 27.2%
HCA Information:	Failed
Cookbook Comments:	Adjust boot time Enable AMSI
Warnings:	Show All Exclude process from analysis (whitelisted): dllhost.exe VT rate limit hit for: /opt/package/joesandbox/database/analysis/430987/sample/vbc.exe.exe

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):	5.60090149728624
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:	vbc.exe.exe
File size:	147456
MD5:	788016c9072423914b96f0d15a61812d
SHA1:	040f85b4ef512bb74990becfa1a5029f92eb65c7
SHA256:	df34f3d4030a5ea484108271f749ca5fbc3af0f415051e98b342a505c88971e4
SHA512:	c9a75e6b54113d3d02c32d314ff76cc82b9bd4b88d07fec6b7636417e49184ebb691ecf63db3aac8dd4a96e49392959638c70ab20412f1c4454ac7963266c2c4
SSDEEP:	3072:JX84PzFh5UOkyp2te2+4lM20JMN0z3wnz:xxFjpYF+4lM20JMN0z3A
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$........#...B...B...B..L^...B...`...B...d...B..Rich.B..........PE..L...x..Q.....................0............... ....@................

File Icon


Icon Hash:	20047c7c70f0e004

Static PE Info

General
Entrypoint:	0x401c10
Entrypoint Section:	.text
Digitally signed:	false
Imagebase:	0x400000
Subsystem:	windows gui
Image File Characteristics:	LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
DLL Characteristics:
Time Stamp:	0x51CF9578 [Sun Jun 30 02:18:32 2013 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:	9b8686288ab82fdbf8ede30bc55c83b7

Entrypoint Preview

Instruction
push 00402064h
call 00007FCE68D87865h
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
inc eax
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [ebx+ebx*2], dl
jp 00007FCE68D8784Ah
push ss
mov ecx, esp
dec esi
pushfd
jmp 00007FCE68D87847h
add byte ptr [edi-11h], ah
or dword ptr [esi+00000000h], 00010000h
add byte ptr [eax], al
add byte ptr [eax], al
loopne 00007FCE68D878E3h
or byte ptr [ebx], al
push eax
dec eax
inc ebp
push edx
inc ebp
inc ebx
push edx
inc ecx
push esp
dec ecx
inc ecx
dec esi
add byte ptr [eax], cl
inc ecx
add byte ptr [eax], al
add byte ptr [eax], al
add bh, bh
int3
xor dword ptr [eax], eax
imul esp, dword ptr [edi-68h]
mov dword ptr [ebp-4Ch], ebx
cmpsb
inc edx
popfd
add esp, dword ptr [ebx-2F00031Dh]
stc
jecxz 00007FCE68D878ADh
mov al, al
push 00000049h
lodsd
popfd
cmp byte ptr [edx], 00000003h
and al, AFh
xor al, 3Ah
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
mov al, byte ptr [48000002h]
add byte ptr [eax], al
add byte ptr [eax], al
or byte ptr [eax], al
jne 00007FCE68D878E0h
bound esp, dword ptr [ebp+77h]
popad
jc 00007FCE68D878D7h
add byte ptr [6C000901h], cl
popad
jbe 00007FCE68D878E6h
insb
outsb

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x20f44	0x28	.text
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x24000	0x970	.rsrc
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x0	0x0
IMAGE_DIRECTORY_ENTRY_SECURITY	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x0	0x0
IMAGE_DIRECTORY_ENTRY_DEBUG	0x0	0x0
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	0x1c4	.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	0x20608	0x21000	False	0.357185132576	data	5.84922850488	IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
.data	0x22000	0x1250	0x1000	False	0.00634765625	data	0.0	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_WRITE, IMAGE_SCN_MEM_READ
.rsrc	0x24000	0x970	0x1000	False	0.1728515625	data	2.05495100774	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ

Resources

Name	RVA	Size	Type	Language	Country
RT_ICON	0x24840	0x130	data
RT_ICON	0x24558	0x2e8	data
RT_ICON	0x24430	0x128	GLS_BINARY_LSB_FIRST
RT_GROUP_ICON	0x24400	0x30	data
RT_VERSION	0x24150	0x2b0	data	English	United States

Imports

DLL

Import

MSVBVM60.DLL

_CIcos, _adj_fptan, __vbaVarMove, __vbaFreeVar, __vbaStrVarMove, __vbaFreeVarList, _adj_fdiv_m64, __vbaFreeObjList, _adj_fprem1, __vbaRecAnsiToUni, __vbaStrCat, __vbaSetSystemError, __vbaRecDestruct, __vbaHresultCheckObj, __vbaLenBstrB, _adj_fdiv_m32, __vbaAryDestruct, __vbaObjSet, __vbaOnError, _adj_fdiv_m16i, __vbaObjSetAddref, _adj_fdivr_m16i, __vbaCyStr, __vbaFpR8, __vbaVarTstLt, _CIsin, __vbaChkstk, EVENT_SINK_AddRef, __vbaGenerateBoundsError, __vbaStrCmp, __vbaAryConstruct2, __vbaObjVar, __vbaI2I4, DllFunctionCall, _adj_fpatan, __vbaLateIdCallLd, __vbaRecUniToAnsi, EVENT_SINK_Release, __vbaUI1I2, _CIsqrt, EVENT_SINK_QueryInterface, __vbaFpCmpCy, __vbaExceptHandler, _adj_fprem, _adj_fdivr_m64, __vbaFPException, _CIlog, __vbaFileOpen, __vbaNew2, __vbaInStr, _adj_fdiv_m32i, _adj_fdivr_m32i, __vbaStrCopy, __vbaFreeStrList, _adj_fdivr_m32, _adj_fdiv_r, __vbaVarTstNe, __vbaI4Var, __vbaVarAdd, __vbaLateMemCall, __vbaVarDup, __vbaStrToAnsi, __vbaFpI4, __vbaLateMemCallLd, __vbaRecDestructAnsi, _CIatan, __vbaStrMove, __vbaCastObj, _allmul, __vbaLateIdSt, _CItan, _CIexp, __vbaFreeObj, __vbaFreeStr

Version Infos

Description	Data
Translation	0x0409 0x04b0
InternalName	Superintellectually
FileVersion	1.00
CompanyName	Mortagage
Comments	Mortagage
ProductName	Mortagage
ProductVersion	1.00
FileDescription	Mortagage
OriginalFilename	Superintellectually.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: vbc.exe.exe PID: 2400 Parent PID: 912

General

Start time:	10:11:44
Start date:	08/06/2021
Path:	C:\Users\user\Desktop\vbc.exe.exe
Wow64 process (32bit):	true
Commandline:	'C:\Users\user\Desktop\vbc.exe.exe'
Imagebase:	0x400000
File size:	147456 bytes
MD5 hash:	788016C9072423914B96F0D15A61812D
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	Visual Basic
Yara matches:	Rule: JoeSecurity_GuLoader_1, Description: Yara detected GuLoader, Source: 00000000.00000000.2095163938.0000000000401000.00000020.00020000.sdmp, Author: Joe Security Rule: JoeSecurity_GuLoader_1, Description: Yara detected GuLoader, Source: 00000000.00000002.3175874940.0000000000401000.00000020.00020000.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

Loading ...

Warning!

Analysis Report vbc.exe.vir

Overview

General Information

Detection

Signatures

Classification

Process Tree

Malware Configuration

Threatname: GuLoader

Yara Overview

Initial Sample

Memory Dumps

Unpacked PEs

Sigma Overview

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:

Language, Device and Operating System Detection:

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

Entrypoint Preview

Data Directories

Sections

Resources

Imports

Version Infos

Possible Origin

Network Behavior

Code Manipulations

Statistics

System Behavior

Analysis Process: vbc.exe.exe PID: 2400 Parent PID: 912

General

Disassembly

Code Analysis