cryptolocker | 8c5a5efc1302ebe59ee2436ea5cd65694eba58c055b4fa94d7a06b910871e122

Analysis

max time kernel
151s
max time network
151s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-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
3052	{34184A33-0407-212E-3320-09040709E2C2}.exe

Executes dropped EXE 7 IoCs

pid	Process
3052	{34184A33-0407-212E-3320-09040709E2C2}.exe
2756	{34184A33-0407-212E-3320-09040709E2C2}.exe
2572	{34184A33-0407-212E-3320-09040709E2C2}.exe
1960	{34184A33-0407-212E-3320-09040709E2C2}.exe
2036	{34184A33-0407-212E-3320-09040709E2C2}.exe
800	{34184A33-0407-212E-3320-09040709E2C2}.exe
2264	{34184A33-0407-212E-3320-09040709E2C2}.exe

Loads dropped DLL 1 IoCs

pid	Process
2240	2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.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-1-5-21-3427588347-1492276948-3422228430-1000\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 28 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 3052	2240	2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe	28
PID 2240 wrote to memory of 3052	2240	2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe	28
PID 2240 wrote to memory of 3052	2240	2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe	28
PID 2240 wrote to memory of 3052	2240	2024-01-09_c55dbd8b7162ec25f7e83e16cf1d57c5_cryptolocker.exe	28
PID 3052 wrote to memory of 2756	3052	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 3052 wrote to memory of 2756	3052	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 3052 wrote to memory of 2756	3052	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 3052 wrote to memory of 2756	3052	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 2756 wrote to memory of 2572	2756	{34184A33-0407-212E-3320-09040709E2C2}.exe	32
PID 2756 wrote to memory of 2572	2756	{34184A33-0407-212E-3320-09040709E2C2}.exe	32
PID 2756 wrote to memory of 2572	2756	{34184A33-0407-212E-3320-09040709E2C2}.exe	32
PID 2756 wrote to memory of 2572	2756	{34184A33-0407-212E-3320-09040709E2C2}.exe	32
PID 2572 wrote to memory of 1960	2572	{34184A33-0407-212E-3320-09040709E2C2}.exe	33
PID 2572 wrote to memory of 1960	2572	{34184A33-0407-212E-3320-09040709E2C2}.exe	33
PID 2572 wrote to memory of 1960	2572	{34184A33-0407-212E-3320-09040709E2C2}.exe	33
PID 2572 wrote to memory of 1960	2572	{34184A33-0407-212E-3320-09040709E2C2}.exe	33
PID 1960 wrote to memory of 2036	1960	{34184A33-0407-212E-3320-09040709E2C2}.exe	34
PID 1960 wrote to memory of 2036	1960	{34184A33-0407-212E-3320-09040709E2C2}.exe	34
PID 1960 wrote to memory of 2036	1960	{34184A33-0407-212E-3320-09040709E2C2}.exe	34
PID 1960 wrote to memory of 2036	1960	{34184A33-0407-212E-3320-09040709E2C2}.exe	34
PID 2036 wrote to memory of 800	2036	{34184A33-0407-212E-3320-09040709E2C2}.exe	35
PID 2036 wrote to memory of 800	2036	{34184A33-0407-212E-3320-09040709E2C2}.exe	35
PID 2036 wrote to memory of 800	2036	{34184A33-0407-212E-3320-09040709E2C2}.exe	35
PID 2036 wrote to memory of 800	2036	{34184A33-0407-212E-3320-09040709E2C2}.exe	35
PID 800 wrote to memory of 2264	800	{34184A33-0407-212E-3320-09040709E2C2}.exe	36
PID 800 wrote to memory of 2264	800	{34184A33-0407-212E-3320-09040709E2C2}.exe	36
PID 800 wrote to memory of 2264	800	{34184A33-0407-212E-3320-09040709E2C2}.exe	36
PID 800 wrote to memory of 2264	800	{34184A33-0407-212E-3320-09040709E2C2}.exe	36

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⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2240
- 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:3052
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:2756
  - - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
      "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:2572
    - - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
        
        "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:1960
      - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
        
        "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
        6⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:2036
        
        C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
        
        "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
        7⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:800
        
        C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
        
        "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
        8⤵
        Executes dropped EXE
        
        PID:2264

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

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

Filesize
338KB

MD5
c55dbd8b7162ec25f7e83e16cf1d57c5

SHA1
375eafc974ac75d7656982912c11bf67e46a2f99

SHA256
8c5a5efc1302ebe59ee2436ea5cd65694eba58c055b4fa94d7a06b910871e122

SHA512
971b2c69ffe147d1b4f6c12c128b5dc6b642a0d8c7f7a5410c1589a3f4839fbf0d9a9aa3664008b1d95fd7bcdeb7fc6603123e57e658ff59d3f2e026425283bc

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads