cryptolocker | 111a4a84fa7fac9d7fa7d86738e6a6605dd593d276335520edb59569c0c9e1e6

Analysis

max time kernel
151s
max time network
165s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02-03-2024 19:49

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General

Target

2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe
Size

384KB
MD5

c0af6d880a8c70a5839c5e639c2124e3
SHA1

5366c18cd68bbd7cc43247bffb8bdb91fb754601
SHA256

111a4a84fa7fac9d7fa7d86738e6a6605dd593d276335520edb59569c0c9e1e6
SHA512

2e406a6f55786d00e79aa53181b738c96a482dbe40704fc7ad7ae6ab5f7de217b8203b4f9c7a3ebfd1b2496b8f0d39476d347592a1e97d2330953a5b151e296d
SSDEEP

6144:xWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvChtj8:xWkEuCaNT85I2vCMX5l+ZRvctj8

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

2980 {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

2980 {34184A33-0407-212E-3320-09040709E2C2}.exe
2068 {34184A33-0407-212E-3320-09040709E2C2}.exe
Loads dropped DLL 2 IoCs

Processes:

2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

pid process

1048 2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe
2980 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2980	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2980	{34184A33-0407-212E-3320-09040709E2C2}.exe
2068	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
1048	2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe
2980	{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-1-5-21-3787592910-3720486031-2929222812-1000\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_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 1048 wrote to memory of 2980	1048	2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1048 wrote to memory of 2980	1048	2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1048 wrote to memory of 2980	1048	2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1048 wrote to memory of 2980	1048	2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2980 wrote to memory of 2068	2980	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2980 wrote to memory of 2068	2980	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2980 wrote to memory of 2068	2980	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2980 wrote to memory of 2068	2980	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-02_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1048
- 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_c0af6d880a8c70a5839c5e639c2124e3_cryptolocker.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2980
- - 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:2068

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
384KB

MD5
c0af6d880a8c70a5839c5e639c2124e3

SHA1
5366c18cd68bbd7cc43247bffb8bdb91fb754601

SHA256
111a4a84fa7fac9d7fa7d86738e6a6605dd593d276335520edb59569c0c9e1e6

SHA512
2e406a6f55786d00e79aa53181b738c96a482dbe40704fc7ad7ae6ab5f7de217b8203b4f9c7a3ebfd1b2496b8f0d39476d347592a1e97d2330953a5b151e296d

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