b8f37630ddb2fbb57a813add4e3c6b315bb796d8bee3e9bfab1ec7d9569e4f82

Analysis

max time kernel
148s
max time network
154s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 02:16

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General

Target
CheckUpdate.dll
Size 1.1MB
Sample260804-cqeaaaen5v
SHA256 b8f37630ddb2fbb57a813add4e3c6b315bb796d8bee3e9bfab1ec7d9569e4f82
MD5 18c715cf106658ea7f963cb5323561a4
SHA1 f54342fb4950e2963c20afff2c915efc0d554f2e
SHA512 442d02ce35fb8506fcb968cec9ef1d0b4237b1c0faa99e833343be606d564752eb9755560778bff0234b1437ce208e77aff84dd70a46dc12176fdba4fe4c866a
SSDEEP 12288:xaCd374kDO8FXwOnYOoHw0Q2DLcM3Z/1dDmF2aJUBq9R5oh:xak374kDO8FAfOopD53ZneVJUq7oh
TLSH
T1B6359E5576E0C570C9BA327518A1873867FBEC39C77422E7BEC83F6949312D25A3821B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

discovery

Malware Config

Signatures

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 3400 wrote to memory of 716	3400	rundll32.exe	89

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\CheckUpdate.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3400
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\CheckUpdate.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:716

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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