c26f2edf86555e23ccfeb0664744f1da32446310d50d9439edb9080d8bea562a

Analysis

max time kernel
140s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/03/2024, 08:18

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General

Target

b43c94a54e52b246139d70534a3321d7.exe
Size

34KB
MD5

b43c94a54e52b246139d70534a3321d7
SHA1

46899569f33d9682c8f48a92cc0d73e59f72b9fd
SHA256

c26f2edf86555e23ccfeb0664744f1da32446310d50d9439edb9080d8bea562a
SHA512

9a96fcdc6f94950b39e6f03a19d198f2697a67ce9d2eb6e70958a61778c206ae001f549ef3b0fca61057eb7794e451f7823b4738c8ea96f775a819991ab0ab0e
SSDEEP

768:m/tYCIW/YZGtv0zbN2D664B6PEUrC+GvPVLc:eFIWgGCzbN2mr6PrJGvi

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\userinit = "C:\\Windows\\system32\\81893b3c.exe,"	b43c94a54e52b246139d70534a3321d7.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	b43c94a54e52b246139d70534a3321d7.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4228 wrote to memory of 1324	4228	b43c94a54e52b246139d70534a3321d7.exe	92
PID 4228 wrote to memory of 1324	4228	b43c94a54e52b246139d70534a3321d7.exe	92
PID 4228 wrote to memory of 1324	4228	b43c94a54e52b246139d70534a3321d7.exe	92

C:\Users\Admin\AppData\Local\Temp\b43c94a54e52b246139d70534a3321d7.exe
"C:\Users\Admin\AppData\Local\Temp\b43c94a54e52b246139d70534a3321d7.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4228
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\B43C94~1.EXE >> NUL
  2⤵
  PID:1324

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4228-0-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/4228-1-0x00000000005A0000-0x00000000005A5000-memory.dmp

Filesize
20KB

Download
memory/4228-2-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/4228-5-0x00000000005A0000-0x00000000005A5000-memory.dmp

Filesize
20KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads