a228900b0ad8d1d33b0346dcac58fc742ee9316fc4e05912a4aee3db6fa8f592

Analysis

max time kernel
149s
max time network
153s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
11/05/2026, 22:24

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General

Target
Updater/VkLayer_steam_fossilize.dll
Size 505KB
Sample260511-2bmqjsbs4s
SHA256 a228900b0ad8d1d33b0346dcac58fc742ee9316fc4e05912a4aee3db6fa8f592
MD5 0d4129135587858163a93b60c1a5e15a
SHA1 d1997d721ba30846c6d803e0118d2c7fd52946ec
SHA512 4e1c5af6f01676935c86f646049dd509ce53a1c90b5525b5d799be709d5d9d79288d16ef22d11a120c45308283c3e5b2719196389b95b4af486fe1bef6cff121
SSDEEP 12288:AYFDxvgKTRhifRx/0rfcYun7ibcV/SfP+T6qkTLQ8BV4u3U:jFDxIBxsrfc9ucV/Sf2T6qkTLdV4F
TLSH
T1BAB49E32F040C171D19E02B1297AAB712B7EA670077828CB778459FDA9B19D39B35B4F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

discovery

Malware Config

Signatures

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4904	3536	WerFault.exe	79

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 5776 wrote to memory of 3536	5776	rundll32.exe	79

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\Updater\VkLayer_steam_fossilize.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5776
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\Updater\VkLayer_steam_fossilize.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3536
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3536 -s 448
    3⤵
    - Program crash
    PID:4904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3536 -ip 3536
1⤵
PID:3744

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

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