Malware Analysis Report

2025-08-10 14:52

Sample ID 241112-ppekwa1qdt
Target c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe
SHA256 c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1
Tags
discovery persistence privilege_escalation
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

c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1

Threat Level: Likely malicious

The file c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe was found to be: Likely malicious.

Malicious Activity Summary

discovery persistence privilege_escalation

Event Triggered Execution: AppInit DLLs

Executes dropped EXE

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-12 12:29

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-12 12:29

Reported

2024-11-12 12:32

Platform

win7-20241023-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe"

Signatures

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

Executes dropped EXE

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

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\grzejjh.exe C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe N/A
File created C:\PROGRA~3\Mozilla\clclgsb.dll C:\PROGRA~3\Mozilla\grzejjh.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\PROGRA~3\Mozilla\grzejjh.exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe N/A
N/A N/A C:\PROGRA~3\Mozilla\grzejjh.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2372 wrote to memory of 2112 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\grzejjh.exe
PID 2372 wrote to memory of 2112 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\grzejjh.exe
PID 2372 wrote to memory of 2112 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\grzejjh.exe
PID 2372 wrote to memory of 2112 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\grzejjh.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe

"C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {536E9526-578B-4673-97D0-BA253A57BA99} S-1-5-18:NT AUTHORITY\System:Service:

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

C:\PROGRA~3\Mozilla\grzejjh.exe -kaflank

Network

N/A

Files

memory/2144-2-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2144-1-0x0000000000280000-0x00000000002DC000-memory.dmp

memory/2144-0-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2144-4-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2144-5-0x0000000000280000-0x00000000002DC000-memory.dmp

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

MD5 8c98d2caf195282645b2792fcbc9a93b
SHA1 42e5635344d624c1eb8869ee1c1b1db65d180354
SHA256 ea5373f870aedec9f625afb56cf4e9ea19e3640ca39972d6a2013c5d7a176225
SHA512 65195f8b6ac7e07f5f5078e2059da3f275546d1bec7a406583806fa524a2bd15fa6ce0173b2be62fbc1795e4a6f17a673f6edaf29dec31c4eb61503cbc2c3cdd

memory/2112-8-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2112-9-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2112-10-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2112-12-0x0000000000400000-0x000000000045B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-12 12:29

Reported

2024-11-12 12:32

Platform

win10v2004-20241007-en

Max time kernel

91s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe"

Signatures

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

Executes dropped EXE

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

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\fchgaxm.exe C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe N/A
File created C:\PROGRA~3\Mozilla\jwkknvd.dll C:\PROGRA~3\Mozilla\fchgaxm.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\PROGRA~3\Mozilla\fchgaxm.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe

"C:\Users\Admin\AppData\Local\Temp\c0ffc0537b08f2b8e752a75e940c3a004021cb7d18b0511014b28a98273a09a1.exe"

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

C:\PROGRA~3\Mozilla\fchgaxm.exe -pjrnomj

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 100.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp

Files

memory/4804-0-0x0000000000400000-0x000000000045B000-memory.dmp

memory/4804-1-0x0000000002220000-0x000000000227C000-memory.dmp

memory/4804-2-0x0000000000400000-0x000000000045B000-memory.dmp

C:\ProgramData\Mozilla\fchgaxm.exe

MD5 b144eeb8b8e371e94ff3dd855e79be71
SHA1 5f02903de34db35201cde6631f0d2586b5118007
SHA256 c553abee7db1ee698c8b3d660e56dd88e107185060fe6423e16392b942b3206b
SHA512 97ba3db0cf1e94450e1352b529e8c3be2335d0971ef92ca620f6f5e03a97dfe31b944e86c1e3c32b02125e4c0815fa70767266d72aeb0eb4a34e25faa63c3dfe

memory/4804-9-0x0000000002220000-0x000000000227C000-memory.dmp

memory/4804-8-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2044-10-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2044-11-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2044-13-0x0000000000400000-0x000000000045B000-memory.dmp