Malware Analysis Report

2025-08-06 00:24

Sample ID 240611-bez7yaxgpb
Target 9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59
SHA256 9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59
Tags
upx persistence
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59

Threat Level: Known bad

The file 9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59 was found to be: Known bad.

Malicious Activity Summary

upx persistence

UPX dump on OEP (original entry point)

UPX dump on OEP (original entry point)

Modifies AppInit DLL entries

UPX packed file

ACProtect 1.3x - 1.4x DLL software

Program crash

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-11 01:04

Signatures

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A

ACProtect 1.3x - 1.4x DLL software

Description Indicator Process Target
N/A N/A N/A N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 01:04

Reported

2024-06-11 01:06

Platform

win10v2004-20240508-en

Max time kernel

147s

Max time network

149s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59.dll,#1

Signatures

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4480 wrote to memory of 4220 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4480 wrote to memory of 4220 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4480 wrote to memory of 4220 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4220 -ip 4220

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4220 -s 712

Network

Country Destination Domain Proto
US 52.111.229.43:443 tcp

Files

memory/4220-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4220-1-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-11 01:04

Reported

2024-06-11 01:06

Platform

win7-20240221-en

Max time kernel

141s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59.dll,#1

Signatures

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Modifies AppInit DLL entries

persistence

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9b8333d4e8e160f2ff803411b82fa7ff3340d61e2c80feb425000e5ed80ffe59.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2912 -s 280

Network

N/A

Files

memory/2912-1-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2912-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2912-2-0x0000000010000000-0x0000000010030000-memory.dmp