e0bb6f1a8606fd8988f93255a5c69e89970da6a30ff60be22d3f90ac5d20e56b

Analysis

max time kernel
150s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
10/10/2026, 04:19

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General

Target
AuthWebhook/ucrtbase.dll
Size 1.1MB
Sample261010-exynlsfe86
SHA256 e0bb6f1a8606fd8988f93255a5c69e89970da6a30ff60be22d3f90ac5d20e56b
MD5 359a14ce507a0d0ada72127ae5e7d439
SHA1 951b1fbc667ffed0b9961bc14a5e7c37bae52afc
SHA512 d6151dc504aa469a275e2ffc25a014995c72dbcf6509e33a679202a5c3f0f4e8f7fe283ca46120cfe53f13cf0b2548e040ac1840fdb615986a9ca7497f7edec0
SSDEEP 24576:th84y2E/fKgq25i20+cQAKEtP1zEaoBX8mcvIZPoy4EM2jk9i:P84vmZNAKEtP1wlbMjc
TLSH
T18F358C10BB88C0B7DCA971BD079DF67E09AD72900B28A8C37BF44BEED42C1C1A576559
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 4624 wrote to memory of 2408	4624	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\AuthWebhook\ucrtbase.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4624
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\AuthWebhook\ucrtbase.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2408

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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