Malware Analysis Report

2025-03-14 23:11

Sample ID 240406-3x6wzsfd58
Target a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2
SHA256 a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2
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

a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2

Threat Level: Likely malicious

The file a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2 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

2024-04-06 23:54

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-06 23:54

Reported

2024-04-06 23:57

Platform

win7-20240220-en

Max time kernel

146s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2.exe"

Signatures

Executes dropped EXE

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

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\wrvdfyg.exe C:\Users\Admin\AppData\Local\Temp\a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2356 wrote to memory of 3020 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\wrvdfyg.exe
PID 2356 wrote to memory of 3020 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\wrvdfyg.exe
PID 2356 wrote to memory of 3020 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\wrvdfyg.exe
PID 2356 wrote to memory of 3020 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\wrvdfyg.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2.exe

"C:\Users\Admin\AppData\Local\Temp\a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {56E6ED25-51DA-4FAF-83EF-545B65C8A49D} S-1-5-18:NT AUTHORITY\System:Service:

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

C:\PROGRA~3\Mozilla\wrvdfyg.exe -hzyjzia

Network

N/A

Files

memory/2200-0-0x0000000000400000-0x000000000045E000-memory.dmp

memory/2200-1-0x0000000000400000-0x000000000045E000-memory.dmp

memory/2200-2-0x0000000000400000-0x000000000045E000-memory.dmp

memory/2200-3-0x0000000000160000-0x0000000000161000-memory.dmp

memory/2200-7-0x0000000000400000-0x000000000045E000-memory.dmp

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

MD5 80c09fa6e221bd376fd11fccadc45a90
SHA1 010f2d6cbbdde4ce03c661be2ceba203e26e94ec
SHA256 d2d937200c3f6b78e06223ca31d1297783fa0d6c5f01fa285aad0b8a3dfac76f
SHA512 73988e4e32e6eb6e9e0b67da7fea09f4cd852aa835c643fa60d27b0e30b4cebf1f7074f12152d8eaa5fd297d1457980fc03d35c4afab5852349eaad5cdedecac

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 23:54

Reported

2024-04-06 23:57

Platform

win10v2004-20240226-en

Max time kernel

148s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2.exe"

Signatures

Modifies AppInit DLL entries

persistence

Executes dropped EXE

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

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\fwjctpb.exe C:\Users\Admin\AppData\Local\Temp\a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2.exe N/A
File created C:\PROGRA~3\Mozilla\jqvifpn.dll C:\PROGRA~3\Mozilla\fwjctpb.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2.exe

"C:\Users\Admin\AppData\Local\Temp\a1b0d5f0e0bea0fd91cf707ef2632433c7bdb2b86cbe7e94effa85314574c0b2.exe"

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

C:\PROGRA~3\Mozilla\fwjctpb.exe -qdcpmcc

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 98.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 137.71.105.51.in-addr.arpa udp

Files

memory/3176-0-0x0000000000400000-0x000000000045E000-memory.dmp

memory/3176-1-0x00000000009A0000-0x00000000009A1000-memory.dmp

memory/3176-2-0x0000000000400000-0x000000000045E000-memory.dmp

C:\ProgramData\Mozilla\fwjctpb.exe

MD5 8f237f0537289a18f07e444b75a8b677
SHA1 e3a29a438b264bccde4bd0e145adb7b567722e42
SHA256 bd39a0768164d478f9099a4f795e116a132be50ecbac556692b77371fc6d572b
SHA512 e0a03f9d6f06ebe64424bfe5981642544e8b3be4384b8518093c64f698316676b9c82bf988956714f1fa3d68c96c0b47cfcba5940d96c41c9a132736a8313287

memory/3176-8-0x0000000000400000-0x000000000045E000-memory.dmp

memory/4716-9-0x0000000000400000-0x000000000045E000-memory.dmp

memory/4716-10-0x0000000000400000-0x000000000045E000-memory.dmp

memory/4716-11-0x0000000000400000-0x000000000045E000-memory.dmp

memory/4716-15-0x0000000000400000-0x000000000045E000-memory.dmp