2f996b6a3b63ff14611b65460b1f68f00b68356bb0e5730a8ff2192914455a3e

Analysis

max time kernel
51s
max time network
53s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
20-06-2024 13:46

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General

Target

wokwinlm/WorkWinLm.exe
Size

512KB
MD5

baf83b929fec027c369723bb3984c5d4
SHA1

8a47d98ab1c77dd2ae7760ce8768f4c74650024d
SHA256

8dbf648d10e62bbc801217201d0abbc232aad07005d93c5e82638b7f7dce8999
SHA512

daa430bf7b9349cfa90327de2d604c294beadc7994af1b9f3512f7851889702cd20cde16f1c8a3d377dc7d6f60ab54c5073d597dc169d830ad90ab28b351a5ca
SSDEEP

12288:h8IE2bGQtCIKLDoUqU+NNiDoxM9mISbENsfLdNFqEI/JKFS:qJZIkscqQeBtIxKF

Score

7^/10

Malware Config

Signatures

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	WorkWinLm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	WorkWinLm.exe

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EC646F5E-AB85-54B5-FC35-6C8158F71253}\ = "Immersive Hotkey Notification"	WorkWinLm.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EC646F5E-AB85-54B5-FC35-6C8158F71253}\InProcServer32	WorkWinLm.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EC646F5E-AB85-54B5-FC35-6C8158F71253}\InProcServer32\ = "%SystemRoot%\\SysWow64\\twinui.dll"	WorkWinLm.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EC646F5E-AB85-54B5-FC35-6C8158F71253}\InProcServer32\ThreadingModel = "Both"	WorkWinLm.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EC646F5E-AB85-54B5-FC35-6C8158F71253}	WorkWinLm.exe

C:\Users\Admin\AppData\Local\Temp\wokwinlm\WorkWinLm.exe
"C:\Users\Admin\AppData\Local\Temp\wokwinlm\WorkWinLm.exe"
1⤵
- Checks BIOS information in registry
- Modifies registry class
PID:2460

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2460-0-0x0000000000400000-0x00000000004E9000-memory.dmp

Filesize
932KB

Download
memory/2460-2-0x0000000000610000-0x0000000000657000-memory.dmp

Filesize
284KB

Download
memory/2460-7-0x0000000000610000-0x0000000000657000-memory.dmp

Filesize
284KB

Download
memory/2460-8-0x0000000000400000-0x00000000004E9000-memory.dmp

Filesize
932KB

Download
memory/2460-9-0x0000000000610000-0x0000000000657000-memory.dmp

Filesize
284KB

Download