55007f5e02c0be3515177478e9930981c94c59c89043708005c81f5aef84bae5

Analysis

max time kernel
149s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
20/10/2026, 11:03

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
libmupdf.dll
Size 3.3MB
Sample261020-m51ryabb66
SHA256 55007f5e02c0be3515177478e9930981c94c59c89043708005c81f5aef84bae5
MD5 a30312b7a63ce4fc454234f634ca21f9
SHA1 8dfe6b9ea2f4fa5a50be9bf678ac34e5966f8817
SHA512 3e19865f90bf270d12f566ceb29150d8004826d9d17d78f282118097c52b71f20c9608e0df8da8da3deab749517f27dec7c64946e9391744653b47c8b0886869
SSDEEP 49152:LqfFgKj+KOh4hvnv9v3blL03DF/sf3nyk8ZZeXIM1mTefLbIrApm6FjpuGqzYo:4+GKh4hiswUkQjpui
TLSH
T1D9F5D011E750D439F1E740FB8BBB927D9538AB62630A41CFA6C4B9C5EB216E03D3164B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

discovery

Malware Config

Signatures

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4896	1624	WerFault.exe	84

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 3336 wrote to memory of 1624	3336	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\libmupdf.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3336
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\libmupdf.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1624
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1624 -s 620
    3⤵
    - Program crash
    PID:4896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1624 -ip 1624
1⤵
PID:3752

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads