Malware Analysis Report

2025-03-14 23:11

Sample ID 240407-aaqx2aeg6v
Target a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1
SHA256 a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1
Tags
persistence
score
8/10

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
8/10

SHA256

a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1

Threat Level: Likely malicious

The file a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1 was found to be: Likely malicious.

Malicious Activity Summary

persistence

Modifies AppInit DLL entries

Executes dropped EXE

Drops file in Program Files directory

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-07 00:00

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-07 00:00

Reported

2024-04-07 00:03

Platform

win7-20240221-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1.exe"

Signatures

Modifies AppInit DLL entries

persistence

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\PROGRA~3\Mozilla\gjsfhjk.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\gjsfhjk.exe C:\Users\Admin\AppData\Local\Temp\a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1.exe N/A
File created C:\PROGRA~3\Mozilla\eurgebe.dll C:\PROGRA~3\Mozilla\gjsfhjk.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1700 wrote to memory of 2612 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\gjsfhjk.exe
PID 1700 wrote to memory of 2612 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\gjsfhjk.exe
PID 1700 wrote to memory of 2612 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\gjsfhjk.exe
PID 1700 wrote to memory of 2612 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\gjsfhjk.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1.exe

"C:\Users\Admin\AppData\Local\Temp\a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {9492E525-2B16-4E65-AAD9-2D5B0F235069} S-1-5-18:NT AUTHORITY\System:Service:

C:\PROGRA~3\Mozilla\gjsfhjk.exe

C:\PROGRA~3\Mozilla\gjsfhjk.exe -tuxiydl

Network

N/A

Files

memory/1632-0-0x0000000000400000-0x0000000000427000-memory.dmp

memory/1632-1-0x0000000000250000-0x00000000002AB000-memory.dmp

memory/1632-7-0x0000000000400000-0x0000000000427000-memory.dmp

C:\PROGRA~3\Mozilla\gjsfhjk.exe

MD5 3e95480efa3aaa7cf693a1159a5b7c28
SHA1 92995ab5d90c382891e1faee1229dd45340acf6f
SHA256 350f5f1da67631d40c237a61834333dc46948d40721db83cf5aad00ceed7e9c3
SHA512 dd57cb9c0862cedbd28f0f757e406f2ac96c630479964c4bb943f0fee27c2fe110eab4416473124e047e687237e85bc32e8f32ee93b9761c4b01363ce908a287

memory/2612-10-0x0000000000400000-0x0000000000427000-memory.dmp

memory/2612-11-0x0000000000D40000-0x0000000000D9B000-memory.dmp

memory/2612-17-0x0000000000400000-0x0000000000427000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 00:00

Reported

2024-04-07 00:03

Platform

win10v2004-20240226-en

Max time kernel

112s

Max time network

162s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1.exe"

Signatures

Modifies AppInit DLL entries

persistence

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\PROGRA~3\Mozilla\xrwomfe.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\xblkzla.dll C:\PROGRA~3\Mozilla\xrwomfe.exe N/A
File created C:\PROGRA~3\Mozilla\xrwomfe.exe C:\Users\Admin\AppData\Local\Temp\a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1.exe

"C:\Users\Admin\AppData\Local\Temp\a4c9765694c14c76a16840d6d85733007009e6b0f34fc496411ae50fbe2e18b1.exe"

C:\PROGRA~3\Mozilla\xrwomfe.exe

C:\PROGRA~3\Mozilla\xrwomfe.exe -cybdupc

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3700 --field-trial-handle=2284,i,2771196087253062161,8107167670425198948,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 145.83.221.88.in-addr.arpa udp

Files

memory/2604-0-0x0000000000400000-0x0000000000427000-memory.dmp

memory/2604-1-0x0000000002190000-0x00000000021EB000-memory.dmp

memory/2604-7-0x0000000000400000-0x0000000000427000-memory.dmp

C:\ProgramData\Mozilla\xrwomfe.exe

MD5 0566d7fd717b1e45599c756e8b8a2a1e
SHA1 a6730354db4be56454caa57451a76dc8cca9a701
SHA256 1d5fd5f192bab062be835765dfc3b836e734de13ba3ef1579cd8726bfad90b65
SHA512 65b9ecb4ac0e537e1d3e799ffee780341c079ff4cc6a401be20a37f80a3624b56b243d1a46f9d1f66017dc8abdddaa751795cb26f92ff3e5215f08df29a2047c

memory/1812-10-0x0000000000400000-0x0000000000427000-memory.dmp

memory/1812-11-0x0000000000D40000-0x0000000000D9B000-memory.dmp

memory/1812-17-0x0000000000400000-0x0000000000427000-memory.dmp