cryptolocker | 8c5a5efc1302ebe59ee2436ea5cd65694eba58c055b4fa94d7a06b910871e122

Analysis

max time kernel
29s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
10-01-2024 06:01

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General

Target

2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe
Size

338KB
MD5

c55dbd8b7162ec25f7e83e16cf1d57c5
SHA1

375eafc974ac75d7656982912c11bf67e46a2f99
SHA256

8c5a5efc1302ebe59ee2436ea5cd65694eba58c055b4fa94d7a06b910871e122
SHA512

971b2c69ffe147d1b4f6c12c128b5dc6b642a0d8c7f7a5410c1589a3f4839fbf0d9a9aa3664008b1d95fd7bcdeb7fc6603123e57e658ff59d3f2e026425283bc
SSDEEP

6144:sWmw04uCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWk4uCaNT85I2vCMX5l+ZRv

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Deletes itself 1 IoCs

pid	Process
2364	{34184A33-0407-212E-3320-09040709E2C2}.exe

Executes dropped EXE 3 IoCs

pid	Process
2364	{34184A33-0407-212E-3320-09040709E2C2}.exe
1908	{34184A33-0407-212E-3320-09040709E2C2}.exe
5008	{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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\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 9 IoCs

description	pid	Process	procid_target
PID 2712 wrote to memory of 2364	2712	2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe	24
PID 2712 wrote to memory of 2364	2712	2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe	24
PID 2712 wrote to memory of 2364	2712	2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe	24
PID 2364 wrote to memory of 1908	2364	{34184A33-0407-212E-3320-09040709E2C2}.exe	20
PID 2364 wrote to memory of 1908	2364	{34184A33-0407-212E-3320-09040709E2C2}.exe	20
PID 2364 wrote to memory of 1908	2364	{34184A33-0407-212E-3320-09040709E2C2}.exe	20
PID 1908 wrote to memory of 5008	1908	{34184A33-0407-212E-3320-09040709E2C2}.exe	104
PID 1908 wrote to memory of 5008	1908	{34184A33-0407-212E-3320-09040709E2C2}.exe	104
PID 1908 wrote to memory of 5008	1908	{34184A33-0407-212E-3320-09040709E2C2}.exe	104

C:\Users\Admin\AppData\Local\Temp\2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2712
- 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\2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2364

C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
"C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000021C
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1908
- C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
  "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000021C
  2⤵
  - Executes dropped EXE
  PID:5008
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000021C
    3⤵
    PID:1040
  - - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
      "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000021C
      4⤵
      PID:4844
    - - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
        
        "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000021C
        5⤵
        
        PID:4060
      - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
        
        "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w0000021C
        6⤵
        
        PID:1864

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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