aeeec75ef46850285c445b48f0ff0beb8c32072697c461f27271704d97c40495

Analysis

max time kernel
149s
max time network
118s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
22/05/2026, 02:47

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General

Target
libs/avutil-vgmstream-56.dll
Size 603KB
Sample260522-daa4csfy2t
SHA256 aeeec75ef46850285c445b48f0ff0beb8c32072697c461f27271704d97c40495
MD5 bb9c3ba330ccb60ae00cc4d558d8ecfd
SHA1 8236f33df89a4000c82ecc9af28fa471dc61e931
SHA512 74b60192d7a001c1723349ad39149c31f44149488c077a06846830ceb6c857e476016463b7081af3168520662dd15d225e19282f8cb33aaf06aa6e714c9a95ab
SSDEEP 12288:q+GEfQi5S3oLaw4jazJnceCiV96cyImabaUYXrf8Bh3Att4+Rlkix6Ib:q+3oi5SYOw4EV96cyImabaUYXboh3Atz
TLSH
T159D45C81FAC724F2F66749369557E77FA7309F024131EE72EB49EB4AF833A122429105
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

discovery

Malware Config

Signatures

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3740	4848	WerFault.exe	80

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 5112 wrote to memory of 4848	5112	rundll32.exe	80

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\libs\avutil-vgmstream-56.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5112
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\libs\avutil-vgmstream-56.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4848
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4848 -s 468
    3⤵
    - Program crash
    PID:3740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4848 -ip 4848
1⤵
PID:4408

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

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Downloads

memory/4848-0-0x0000000074C10000-0x0000000074CBF000-memory.dmp

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