Malware Analysis Report

2025-03-14 23:13

Sample ID 240406-3tn7rsfc68
Target 9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb
SHA256 9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb
Tags
persistence upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb

Threat Level: Known bad

The file 9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb was found to be: Known bad.

Malicious Activity Summary

persistence upx

UPX dump on OEP (original entry point)

UPX dump on OEP (original entry point)

Modifies AppInit DLL entries

ACProtect 1.3x - 1.4x DLL software

UPX packed file

Unsigned PE

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-06 23:48

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: behavioral1

Detonation Overview

Submitted

2024-04-06 23:48

Reported

2024-04-06 23:51

Platform

win7-20231129-en

Max time kernel

140s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb.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\9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2900 -s 304

Network

N/A

Files

memory/2900-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2900-1-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2900-3-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2900-2-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 23:48

Reported

2024-04-06 23:51

Platform

win10v2004-20240226-en

Max time kernel

93s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb.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

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

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 1172 wrote to memory of 4128 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1172 wrote to memory of 4128 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1172 wrote to memory of 4128 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\9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9e3d3e4d38a3339e877b3c7b2876dbedeb5a5e2d364440494f9896a6c710bddb.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 4128 -ip 4128

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4128 -s 704

Network

Country Destination Domain Proto
US 8.8.8.8:53 105.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/4128-0-0x0000000010000000-0x0000000010030000-memory.dmp

memory/4128-1-0x0000000010000000-0x0000000010030000-memory.dmp