Malware Analysis Report

2025-08-05 21:25

Sample ID 231222-cjwwrafbgn
Target 4f72edc93c9aa593c9c724dd9ee2a0c5
SHA256 370c712dd759ed8920ea8f60e4a0fcecd11a8cfa8642fb4c9e4f7df3ab05c107
Tags
vmprotect
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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
7/10

SHA256

370c712dd759ed8920ea8f60e4a0fcecd11a8cfa8642fb4c9e4f7df3ab05c107

Threat Level: Shows suspicious behavior

The file 4f72edc93c9aa593c9c724dd9ee2a0c5 was found to be: Shows suspicious behavior.

Malicious Activity Summary

vmprotect

VMProtect packed file

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-22 02:06

Signatures

VMProtect packed file

vmprotect
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

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 02:06

Reported

2023-12-22 06:10

Platform

win10v2004-20231215-en

Max time kernel

141s

Max time network

146s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4f72edc93c9aa593c9c724dd9ee2a0c5.dll,#1

Signatures

VMProtect packed file

vmprotect
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
N/A N/A N/A N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2732 wrote to memory of 4352 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2732 wrote to memory of 4352 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2732 wrote to memory of 4352 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\4f72edc93c9aa593c9c724dd9ee2a0c5.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4f72edc93c9aa593c9c724dd9ee2a0c5.dll,#1

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 148.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp

Files

memory/4352-0-0x00000000022F0000-0x00000000024A9000-memory.dmp

memory/4352-1-0x00000000022F0000-0x00000000024A9000-memory.dmp

memory/4352-2-0x00000000022F0000-0x00000000024A9000-memory.dmp

memory/4352-3-0x00000000022F0000-0x00000000024A9000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 02:06

Reported

2023-12-22 06:10

Platform

win7-20231215-en

Max time kernel

141s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4f72edc93c9aa593c9c724dd9ee2a0c5.dll,#1

Signatures

VMProtect packed file

vmprotect
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
N/A N/A N/A N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3016 wrote to memory of 2400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3016 wrote to memory of 2400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3016 wrote to memory of 2400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3016 wrote to memory of 2400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3016 wrote to memory of 2400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3016 wrote to memory of 2400 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3016 wrote to memory of 2400 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\4f72edc93c9aa593c9c724dd9ee2a0c5.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\4f72edc93c9aa593c9c724dd9ee2a0c5.dll,#1

Network

N/A

Files

memory/2400-0-0x0000000000A30000-0x0000000000BE9000-memory.dmp

memory/2400-1-0x0000000000A30000-0x0000000000BE9000-memory.dmp

memory/2400-2-0x0000000000A30000-0x0000000000BE9000-memory.dmp

memory/2400-3-0x0000000000A30000-0x0000000000BE9000-memory.dmp