cryptolocker | 17849d3bf40f1d6833c538664ac843f728aba013c965e3ccb38b273c5f5c7e79

Analysis

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

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02-03-2024 16:51

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General

Target

2024-03-02_57075198c87ac0e2936355d2736b1164_cryptolocker.exe
Size

404KB
MD5

57075198c87ac0e2936355d2736b1164
SHA1

059d97a1bbce7eaabfd357348518ee9895e507cb
SHA256

17849d3bf40f1d6833c538664ac843f728aba013c965e3ccb38b273c5f5c7e79
SHA512

1cc1360eaceb241f4bf3ff5acbd13c1b1ce91945ce002f570ff1d0742206522557f651e4285bcedc38375732aec1fed2b03633fa60227619b5a8f1b7999abf00
SSDEEP

12288:gWkEuCaNT85I2vCMX5l+ZRvjfQ3AoMQ3:gEuCalMpCjfQ3AoMQ3

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
Deletes itself 1 IoCs

Processes:

{34184A33-0407-212E-3320-09040709E2C2}.exe

pid process

960 {34184A33-0407-212E-3320-09040709E2C2}.exe
Executes dropped EXE 2 IoCs

Processes:

{34184A33-0407-212E-3320-09040709E2C2}.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

pid process

960 {34184A33-0407-212E-3320-09040709E2C2}.exe
3880 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
960	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
960	{34184A33-0407-212E-3320-09040709E2C2}.exe
3880	{34184A33-0407-212E-3320-09040709E2C2}.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

{34184A33-0407-212E-3320-09040709E2C2}.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3270530367-132075249-2153716227-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe"	{34184A33-0407-212E-3320-09040709E2C2}.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

2024-03-02_57075198c87ac0e2936355d2736b1164_cryptolocker.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 3760 wrote to memory of 960	3760	2024-03-02_57075198c87ac0e2936355d2736b1164_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3760 wrote to memory of 960	3760	2024-03-02_57075198c87ac0e2936355d2736b1164_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3760 wrote to memory of 960	3760	2024-03-02_57075198c87ac0e2936355d2736b1164_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 960 wrote to memory of 3880	960	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 960 wrote to memory of 3880	960	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 960 wrote to memory of 3880	960	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\2024-03-02_57075198c87ac0e2936355d2736b1164_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-02_57075198c87ac0e2936355d2736b1164_cryptolocker.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3760
- C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
  "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" "/rC:\Users\Admin\AppData\Local\Temp\2024-03-02_57075198c87ac0e2936355d2736b1164_cryptolocker.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:960
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w00000224
    3⤵
    - Executes dropped EXE
    PID:3880

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe

Filesize
404KB

MD5
57075198c87ac0e2936355d2736b1164

SHA1
059d97a1bbce7eaabfd357348518ee9895e507cb

SHA256
17849d3bf40f1d6833c538664ac843f728aba013c965e3ccb38b273c5f5c7e79

SHA512
1cc1360eaceb241f4bf3ff5acbd13c1b1ce91945ce002f570ff1d0742206522557f651e4285bcedc38375732aec1fed2b03633fa60227619b5a8f1b7999abf00

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