Malware Analysis Report

2025-03-14 22:36

Sample ID 240406-1zlmqacd3t
Target 6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87
SHA256 6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87
Tags
upx persistence
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

6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87

Threat Level: Known bad

The file 6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87 was found to be: Known bad.

Malicious Activity Summary

upx persistence

UPX dump on OEP (original entry point)

UPX dump on OEP (original entry point)

Modifies AppInit DLL entries

UPX packed file

Executes dropped EXE

Drops file in Program Files directory

Unsigned PE

Program crash

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-06 22:05

Signatures

UPX dump on OEP (original entry point)

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 22:05

Reported

2024-04-06 22:07

Platform

win7-20240221-en

Max time kernel

119s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87.exe"

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

Executes dropped EXE

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

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

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\tbckyxk.exe C:\Users\Admin\AppData\Local\Temp\6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87.exe N/A
File created C:\PROGRA~3\Mozilla\newtrln.dll C:\PROGRA~3\Mozilla\tbckyxk.exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87.exe N/A
N/A N/A C:\PROGRA~3\Mozilla\tbckyxk.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1072 wrote to memory of 2900 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\tbckyxk.exe
PID 1072 wrote to memory of 2900 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\tbckyxk.exe
PID 1072 wrote to memory of 2900 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\tbckyxk.exe
PID 1072 wrote to memory of 2900 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\tbckyxk.exe

Processes

C:\Users\Admin\AppData\Local\Temp\6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87.exe

"C:\Users\Admin\AppData\Local\Temp\6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {C0809AE8-9C41-4144-A5D8-9BC7CB8FFBB5} S-1-5-18:NT AUTHORITY\System:Service:

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

C:\PROGRA~3\Mozilla\tbckyxk.exe -gqpcbye

Network

N/A

Files

memory/2240-0-0x0000000000400000-0x000000000045E000-memory.dmp

memory/2240-1-0x0000000000260000-0x00000000002BB000-memory.dmp

memory/2240-2-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2240-4-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2240-5-0x0000000000260000-0x00000000002BB000-memory.dmp

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

MD5 1a80d8e71d605667861b7426d7b0c870
SHA1 b5cbcd6c78efa62034c6ea1741ff41bd76f379ad
SHA256 521446db27ab2273c05e22409df77cc3b73f2cb96c62f910d9b04f40655bde5d
SHA512 6587af02d2ca8edc7adcc9845ec26bbc30bd9e3df5cebf47e2201129e33f7286aee99248f09c067b37b44ad9ef7b227b76b566e89e3655be0ed55ed9c4157382

memory/2900-8-0x0000000000400000-0x000000000045E000-memory.dmp

memory/2900-9-0x0000000000460000-0x00000000004BB000-memory.dmp

memory/2900-10-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2900-12-0x0000000000400000-0x000000000045B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 22:05

Reported

2024-04-06 22:08

Platform

win10v2004-20240226-en

Max time kernel

114s

Max time network

163s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87.exe"

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

UPX packed file

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

Processes

C:\Users\Admin\AppData\Local\Temp\6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87.exe

"C:\Users\Admin\AppData\Local\Temp\6c9b79983a0b1da3003d43969e5fd004efd05a09a5f6b6e9ab83d1572c3c1a87.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1080 -ip 1080

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1080 -s 448

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=2984 --field-trial-handle=2276,i,1205556100727695622,5044463180471657307,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 17.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

memory/1080-0-0x0000000000400000-0x000000000045E000-memory.dmp

memory/1080-1-0x0000000000610000-0x000000000066B000-memory.dmp

memory/1080-2-0x0000000000400000-0x000000000045E000-memory.dmp

memory/1080-3-0x0000000000610000-0x000000000066B000-memory.dmp