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Analysis Report 21558_Invoice_confirmation.exe

Overview

General Information

Sample Name:	21558_Invoice_confirmation.exe
Analysis ID:	337759
MD5:	2c4f59a6c931a328dd5d6113c995c35b
SHA1:	51e56d7fb64cc3a071b12410bcecbf38675fadcc
SHA256:	859bd0c7c174ff2237da9fac27c2feb0e0bbbfe536b273a495440ccd3b748729
Tags:	exeGuLoader
Most interesting Screenshot:
Errors Sigma syntax error: Has an empty selector, Rule: Abusing Azure Browser SSO

Detection

GuLoader

Score:	76
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Potential malicious icon found

Yara detected GuLoader

Executable has a suspicious name (potential lure to open the executable)

Initial sample is a PE file and has a suspicious name

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Tries to detect virtualization through RDTSC time measurements

Yara detected VB6 Downloader Generic

Abnormal high CPU Usage

Contains functionality for execution timing, often used to detect debuggers

Contains functionality to detect virtual machines (SGDT)

Contains functionality to read the PEB

PE file contains strange resources

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

Uses 32bit PE files

Uses code obfuscation techniques (call, push, ret)

Classification

Startup

System is w10x64

21558_Invoice_confirmation.exe (PID: 7052 cmdline: 'C:\Users\user\Desktop\21558_Invoice_confirmation.exe' MD5: 2C4F59A6C931A328DD5D6113C995C35B)

cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

Source	Rule	Description	Author	Strings
Process Memory Space: 21558_Invoice_confirmation.exe PID: 7052	JoeSecurity_VB6DownloaderGeneric	Yara detected VB6 Downloader Generic	Joe Security
Process Memory Space: 21558_Invoice_confirmation.exe PID: 7052	JoeSecurity_GuLoader	Yara detected GuLoader	Joe Security

Sigma Overview

No Sigma rule has matched

Signature Overview

Click to jump to signature section

Show All Signature Results

Source: 21558_Invoice_confirmation.exe

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

System Summary:

Potential malicious icon found

Show sources

Source: initial sample

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

Executable has a suspicious name (potential lure to open the executable)

Show sources

Source: 21558_Invoice_confirmation.exe

Static file information: Suspicious name

Initial sample is a PE file and has a suspicious name

Show sources

Source: initial sample

Static PE information: Filename: 21558_Invoice_confirmation.exe

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe

Process Stats: CPU usage > 98%

Source: 21558_Invoice_confirmation.exe

Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST

Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398199064.0000000002090000.00000002.00000001.sdmp	Binary or memory string: OriginalFilenameuser32j% vs 21558_Invoice_confirmation.exe
Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1397787159.0000000000416000.00000002.00020000.sdmp	Binary or memory string: OriginalFilenameASSACU.exe vs 21558_Invoice_confirmation.exe
Source: 21558_Invoice_confirmation.exe	Binary or memory string: OriginalFilenameASSACU.exe vs 21558_Invoice_confirmation.exe

Source: 21558_Invoice_confirmation.exe

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

Source: classification engine

Classification label: mal76.rans.troj.evad.winEXE@1/0@0/0

Source: 21558_Invoice_confirmation.exe

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

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe

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

Jump to behavior

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe

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

Jump to behavior

Data Obfuscation:

Yara detected GuLoader

Show sources

Source: Yara match

File source: Process Memory Space: 21558_Invoice_confirmation.exe PID: 7052, type: MEMORY

Yara detected VB6 Downloader Generic

Show sources

Source: Yara match

File source: Process Memory Space: 21558_Invoice_confirmation.exe PID: 7052, type: MEMORY

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_00404F88 push cs; iretd	0_2_00404F96
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F366A push ebp; retf	0_2_004F4222
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F4230 push ebp; retf	0_2_004F4222
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F12CC push ebp; retf	0_2_004F4222
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F4368 push C8F1A01Fh; iretd	0_2_004F4375

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Process information set: NOOPENFILEERRORBOX	Jump to behavior

Malware Analysis System Evasion:

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Show sources

Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1397946122.00000000004F0000.00000040.00000001.sdmp

Binary or memory string: C:\PROGRAM FILES\QEMU-GA\QEMU-GA.EXE

Tries to detect virtualization through RDTSC time measurements

Show sources

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe

RDTSC instruction interceptor: First address: 0000000000404336 second address: 0000000000404336 instructions: 0x00000000 rdtsc 0x00000002 wait 0x00000003 nop 0x00000004 dec esi 0x00000005 nop 0x00000006 nop 0x00000007 cmp esi, 00000000h 0x0000000a jne 00007F3534BA1396h 0x0000000c rdtsc

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe

Code function: 0_2_0040432C rdtsc

0_2_0040432C

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe

Code function: 0_2_004F2A03 sgdt fword ptr [eax]

0_2_004F2A03

Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1397946122.00000000004F0000.00000040.00000001.sdmp

Binary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe

Code function: 0_2_0040432C rdtsc

0_2_0040432C

Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F49C6 mov eax, dword ptr fs:[00000030h]	0_2_004F49C6
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F4D8B mov eax, dword ptr fs:[00000030h]	0_2_004F4D8B
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F56FE mov eax, dword ptr fs:[00000030h]	0_2_004F56FE
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F56F9 mov eax, dword ptr fs:[00000030h]	0_2_004F56F9
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F2E83 mov eax, dword ptr fs:[00000030h]	0_2_004F2E83
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F5749 mov eax, dword ptr fs:[00000030h]	0_2_004F5749
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F5761 mov eax, dword ptr fs:[00000030h]	0_2_004F5761
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F5779 mov eax, dword ptr fs:[00000030h]	0_2_004F5779
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F5713 mov eax, dword ptr fs:[00000030h]	0_2_004F5713
Source: C:\Users\user\Desktop\21558_Invoice_confirmation.exe	Code function: 0_2_004F572B mov eax, dword ptr fs:[00000030h]	0_2_004F572B

Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398081537.0000000000C20000.00000002.00000001.sdmp	Binary or memory string: Shell_TrayWnd
Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398081537.0000000000C20000.00000002.00000001.sdmp	Binary or memory string: Progman
Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398081537.0000000000C20000.00000002.00000001.sdmp	Binary or memory string: &Program Manager
Source: 21558_Invoice_confirmation.exe, 00000000.00000002.1398081537.0000000000C20000.00000002.00000001.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 Evasion1	OS Credential Dumping	Security Software Discovery211	Remote Services	Data from Local System	Exfiltration Over Other Network Medium	Data Obfuscation	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 Evasion1	Remote Desktop Protocol	Data from Removable Media	Exfiltration Over Bluetooth	Junk Data	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 Discovery11	Distributed Component Object Model	Input Capture	Scheduled Transfer	Protocol Impersonation	SIM Card Swap		Carrier Billing Fraud

Behavior Graph

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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

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Behavior Section

Behavior Chronological

Disassembly

Uncategorized

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Warning!

Analysis Report 21558_Invoice_confirmation.exe

Overview

General Information

Detection

Signatures

Classification

Startup

Malware Configuration

Yara Overview

Memory Dumps

Sigma Overview

Signature Overview

Compliance:

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