Malware Analysis Report

2025-03-14 22:36

Sample ID 240406-1z7j7acd4w
Target 6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d
SHA256 6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d
Tags
persistence upx
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

6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d

Threat Level: Known bad

The file 6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d was found to be: Known bad.

Malicious Activity Summary

persistence upx

UPX dump on OEP (original entry point)

UPX dump on OEP (original entry point)

Modifies AppInit DLL entries

Executes dropped EXE

UPX packed file

Drops file in Program Files directory

Unsigned PE

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-06 22:06

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 22:06

Reported

2024-04-06 22:08

Platform

win7-20231129-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.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\anhxrcb.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\anhxrcb.exe C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.exe N/A
File created C:\PROGRA~3\Mozilla\fqurfhn.dll C:\PROGRA~3\Mozilla\anhxrcb.exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.exe N/A
N/A N/A C:\PROGRA~3\Mozilla\anhxrcb.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3016 wrote to memory of 3044 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\anhxrcb.exe
PID 3016 wrote to memory of 3044 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\anhxrcb.exe
PID 3016 wrote to memory of 3044 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\anhxrcb.exe
PID 3016 wrote to memory of 3044 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\anhxrcb.exe

Processes

C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.exe

"C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {9A5AE5AF-AECA-4007-85F1-1C4C022A808D} S-1-5-18:NT AUTHORITY\System:Service:

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

C:\PROGRA~3\Mozilla\anhxrcb.exe -wxojhrj

Network

N/A

Files

memory/1752-0-0x0000000000400000-0x000000000045E000-memory.dmp

memory/1752-2-0x00000000004D0000-0x000000000052B000-memory.dmp

memory/1752-1-0x0000000000400000-0x000000000045B000-memory.dmp

memory/1752-4-0x0000000000400000-0x000000000045B000-memory.dmp

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

MD5 acc7243b22ca7c26453c786e5ce31ab2
SHA1 96026ab8e51e65c6c2017f098f1b13d5cd276f49
SHA256 caba03379f6bdebea5cf00c54f1ca1b5997be89c9b4d028c7fce24e1c7385e31
SHA512 c5668f7ce4e3cb17b772f7131586a5a82b76eb425e0510d21d354c073ed384a7706f96d254465fe827204c377fc85f4e4d99579a2b5c44676377a528aebc3482

memory/3044-7-0x0000000000400000-0x000000000045E000-memory.dmp

memory/3044-8-0x0000000000460000-0x00000000004BB000-memory.dmp

memory/3044-9-0x0000000000400000-0x000000000045B000-memory.dmp

memory/3044-11-0x0000000000400000-0x000000000045B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 22:06

Reported

2024-04-06 22:08

Platform

win10v2004-20240226-en

Max time kernel

91s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.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

Modifies AppInit DLL entries

persistence

Executes dropped EXE

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

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\kzlcazd.dll C:\PROGRA~3\Mozilla\gfuniul.exe N/A
File created C:\PROGRA~3\Mozilla\gfuniul.exe C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.exe

"C:\Users\Admin\AppData\Local\Temp\6d52522198afacd48a2ddf3a89f5a1d8cea5701bc76d1c06414ac6036f22239d.exe"

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

C:\PROGRA~3\Mozilla\gfuniul.exe -lfdzfzd

Network

Country Destination Domain Proto
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

memory/5048-0-0x0000000000400000-0x000000000045E000-memory.dmp

memory/5048-1-0x00000000008F0000-0x000000000094B000-memory.dmp

memory/5048-2-0x0000000000400000-0x000000000045B000-memory.dmp

memory/5048-6-0x0000000000400000-0x000000000045B000-memory.dmp

C:\ProgramData\Mozilla\gfuniul.exe

MD5 bb32d87aa892a4d75dff0f071456a0b6
SHA1 dae6e23e61fe31ee33dc78a15804c713dd522828
SHA256 79dae61e073f1995c13608cea51a6b4e68e41eddb64e423d8ad5df95bacdced2
SHA512 e9f38c36bc50adc055dfd112ab1e636c205e45b3d0ab96054191c5f419375f06bff209044962b09374d168fa138727c857ef1f946b0683d1bf91e29233266536

memory/4036-8-0x0000000000DA0000-0x0000000000DFB000-memory.dmp

memory/4036-9-0x0000000000400000-0x000000000045B000-memory.dmp

memory/4036-12-0x0000000000400000-0x000000000045B000-memory.dmp