8e09d37569170e2798d05120f1cc61d45548bcb6a388fa467c46ea2fa437d02d

Analysis

max time kernel
91s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01-12-2022 21:21

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General

Target

8e09d37569170e2798d05120f1cc61d45548bcb6a388fa467c46ea2fa437d02d.dll
Size

23KB
MD5

439f88bea8f29148cd4caf720f531840
SHA1

5d5232bd07c58810eea4965eb04ed47e34b093da
SHA256

8e09d37569170e2798d05120f1cc61d45548bcb6a388fa467c46ea2fa437d02d
SHA512

af9e90c706737cbc317a3f8a6c3222de9a602f32c0e655e560f99066cb801fe5070b9920073762453710e35afb4254db9c756c6211534858fba4ff33a3ed5d92
SSDEEP

384:KA/aKe1URKrnt38RW5EUnLGp1hPYXBGaBTi9xIzDVJ5zG:C1URUXuULeaw2fVJ4

Score

7^/10

persistence

Malware Config

Signatures

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ChkDisk.lnk	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ChkDisk.dll	rundll32.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\autochk = "rundll32.exe C:\\Windows\\system32\\autochk.dll,_IWMPEvents@16"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\autochk = "rundll32.exe C:\\Users\\Admin\\protect.dll,_IWMPEvents@16"	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\autochk.dll	rundll32.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3428	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 3428	3052	rundll32.exe	78
PID 3052 wrote to memory of 3428	3052	rundll32.exe	78
PID 3052 wrote to memory of 3428	3052	rundll32.exe	78

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8e09d37569170e2798d05120f1cc61d45548bcb6a388fa467c46ea2fa437d02d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8e09d37569170e2798d05120f1cc61d45548bcb6a388fa467c46ea2fa437d02d.dll,#1
  2⤵
  - Drops startup file
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of SetWindowsHookEx
  PID:3428

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3428-135-0x0000000010000000-0x000000001000A000-memory.dmp

Filesize
40KB

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