91d7bd1e350d571def7a53910440752ad046c7c6ccca67024386a106850e4f4a

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15-03-2024 11:53

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General

Target

cb58239ae98ca965490821a8c21a52a0.dll
Size

36KB
MD5

cb58239ae98ca965490821a8c21a52a0
SHA1

c1b4b128e1e14fe9d4694bd50af43b59df075fa7
SHA256

91d7bd1e350d571def7a53910440752ad046c7c6ccca67024386a106850e4f4a
SHA512

a2bb478b6942c75246025cd5d7cdf04a2241ee51d833eda29b0d2ed42c0f9608d2873f4c3941e55afed6ddeda4f083273f62b019ee8a3cf94a11ae93f31de626
SSDEEP

768:TjgiGxy+iC146BDRK97J3+ZFWo2iU+DaLW:nMy+hQYFWuaLW

Score

8^/10

persistence

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	cmd.exe

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

System Information Discovery
T1082

Modifies registry class 2 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\regfile\shell\open\command\ = "regedit.exe /s \"%1\""	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000_Classes\Local Settings	cmd.exe

Runs .reg file with regedit 1 IoCs

pid	Process
4948	regedit.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
392	rundll32.exe
392	rundll32.exe
392	rundll32.exe
392	rundll32.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3292 wrote to memory of 392	3292	rundll32.exe	87
PID 3292 wrote to memory of 392	3292	rundll32.exe	87
PID 3292 wrote to memory of 392	3292	rundll32.exe	87
PID 392 wrote to memory of 4356	392	rundll32.exe	91
PID 392 wrote to memory of 4356	392	rundll32.exe	91
PID 392 wrote to memory of 4356	392	rundll32.exe	91
PID 4356 wrote to memory of 4948	4356	cmd.exe	94
PID 4356 wrote to memory of 4948	4356	cmd.exe	94
PID 4356 wrote to memory of 4948	4356	cmd.exe	94

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cb58239ae98ca965490821a8c21a52a0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3292
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\cb58239ae98ca965490821a8c21a52a0.dll,#1
  2⤵
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:392
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\a.reg
    3⤵
    - Checks computer location settings
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:4356
  - - C:\Windows\SysWOW64\regedit.exe
      "regedit.exe" /s "C:\Users\Admin\AppData\Local\Temp\a.reg"
      4⤵
      Runs .reg file with regedit
      PID:4948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

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

C:\Users\Admin\AppData\Local\Temp\a.reg

Filesize
152B

MD5
b100f5324ef74ded0b998e64d07a2e19

SHA1
40b0d7f51bf2dd8451f1b723d21355c471a5fa46

SHA256
3db613d24a75ae220891698c055e1c580a42e58564f568a0510db87581cc2042

SHA512
c12391bb37c334074f7d7e1257b6364fd5cbce848e0a8fe15b8326f54fd9568fe3baec58618c4334027a774a06a08ec249cb71db925c1f85feee6a3d3a816c04

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