Malware Analysis Report

2025-08-11 08:19

Sample ID 241112-n1l9es1lhz
Target 9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe
SHA256 9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e
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

9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e

Threat Level: Likely malicious

The file 9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.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

System Location Discovery: System Language Discovery

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of UnmapMainImage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-12 11:51

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-12 11:51

Reported

2024-11-12 11:54

Platform

win7-20240708-en

Max time kernel

118s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.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\yofzeuh.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\yofzeuh.exe C:\Users\Admin\AppData\Local\Temp\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe N/A
File created C:\PROGRA~3\Mozilla\mkkxkvk.dll C:\PROGRA~3\Mozilla\yofzeuh.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\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\PROGRA~3\Mozilla\yofzeuh.exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe N/A
N/A N/A C:\PROGRA~3\Mozilla\yofzeuh.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2488 wrote to memory of 1976 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\yofzeuh.exe
PID 2488 wrote to memory of 1976 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\yofzeuh.exe
PID 2488 wrote to memory of 1976 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\yofzeuh.exe
PID 2488 wrote to memory of 1976 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\yofzeuh.exe

Processes

C:\Users\Admin\AppData\Local\Temp\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe

"C:\Users\Admin\AppData\Local\Temp\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {4D8C61EE-3338-4361-AB22-73D376A9C833} S-1-5-18:NT AUTHORITY\System:Service:

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

C:\PROGRA~3\Mozilla\yofzeuh.exe -qmgjyzc

Network

N/A

Files

memory/388-0-0x0000000000400000-0x000000000045B000-memory.dmp

memory/388-1-0x0000000000460000-0x00000000004BC000-memory.dmp

memory/388-2-0x0000000000400000-0x000000000045B000-memory.dmp

memory/388-4-0x0000000000400000-0x000000000045B000-memory.dmp

memory/388-5-0x0000000000460000-0x00000000004BC000-memory.dmp

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

MD5 5c6d56caf5b651f2c38af4bb5b4335c0
SHA1 d7a139c7a68de491cf7c04332b5303e3eb5b8bc6
SHA256 58d00238ea6ad7aee2d5697f66419eb4804dffbe0f1ea5fbeb4e0f2f4f6c66f7
SHA512 91e88004001eec09f91d3026ce1b4e4485f3d6bcff1acb5739d9142ef4fd879d04c72958fbeee59bbfb0dd926f73c7a4629fe658c6172faf94e343391c1aaa10

memory/1976-8-0x0000000000400000-0x000000000045B000-memory.dmp

memory/1976-9-0x0000000000400000-0x000000000045B000-memory.dmp

memory/1976-11-0x0000000000400000-0x000000000045B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-12 11:51

Reported

2024-11-12 11:54

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe"

Signatures

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\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe

"C:\Users\Admin\AppData\Local\Temp\9e5a41afa9428ac0083d29a5b08c1ef7e6ad8f589f28631ba759bb97c9143d6e.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1900 -ip 1900

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1900 -s 460

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 100.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

memory/1900-0-0x0000000000400000-0x000000000045B000-memory.dmp

memory/1900-1-0x00000000021D0000-0x000000000222C000-memory.dmp

memory/1900-2-0x0000000000400000-0x000000000045B000-memory.dmp

memory/1900-3-0x00000000021D0000-0x000000000222C000-memory.dmp