cryptolocker | a2d30528b94d53630f0ba976b9c1013b98c2d441c0a851da7b0b09eaa97a04d2

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02-03-2024 19:47

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General

Target

2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe
Size

395KB
MD5

b220f4e1565e79783d72d20d72794af3
SHA1

b7bcdf1f9a967459746cfc77f9d80747a57cdae2
SHA256

a2d30528b94d53630f0ba976b9c1013b98c2d441c0a851da7b0b09eaa97a04d2
SHA512

fa8eab59e4115cb90b558b5ca120718d153ecccb1da360f9a8950dc9708fc1f41083a0bc9354ef158fda9ae60ab289aab0ff626370a14afdf6ec0d669cd824a3
SSDEEP

6144:wWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvChqAIQ3E2:wWkEuCaNT85I2vCMX5l+ZRvQqLQ3E2

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

2480 {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

2480 {34184A33-0407-212E-3320-09040709E2C2}.exe
2588 {34184A33-0407-212E-3320-09040709E2C2}.exe
Loads dropped DLL 2 IoCs

Processes:

2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

pid process

2208 2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe
2480 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2480	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2480	{34184A33-0407-212E-3320-09040709E2C2}.exe
2588	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2208	2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe
2480	{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-1-5-21-3452737119-3959686427-228443150-1000\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 8 IoCs

Processes:

2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 2208 wrote to memory of 2480	2208	2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2208 wrote to memory of 2480	2208	2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2208 wrote to memory of 2480	2208	2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2208 wrote to memory of 2480	2208	2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2480 wrote to memory of 2588	2480	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2480 wrote to memory of 2588	2480	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2480 wrote to memory of 2588	2480	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2480 wrote to memory of 2588	2480	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-02_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2208
- 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_b220f4e1565e79783d72d20d72794af3_cryptolocker.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2480
- - 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
    PID:2588

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

Replay Monitor

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Downloads

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

Filesize
395KB

MD5
b220f4e1565e79783d72d20d72794af3

SHA1
b7bcdf1f9a967459746cfc77f9d80747a57cdae2

SHA256
a2d30528b94d53630f0ba976b9c1013b98c2d441c0a851da7b0b09eaa97a04d2

SHA512
fa8eab59e4115cb90b558b5ca120718d153ecccb1da360f9a8950dc9708fc1f41083a0bc9354ef158fda9ae60ab289aab0ff626370a14afdf6ec0d669cd824a3

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