cryptolocker | 25f32a5b479f153bb5e009d97b1c67975ace08fc0a55c7672365d32296d9d6e1

Analysis

max time kernel
153s
max time network
158s
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 16:31

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General

Target

2024-03-02_1715bfa5f8e214c5ac3f2cab2126785f_cryptolocker.exe
Size

390KB
MD5

1715bfa5f8e214c5ac3f2cab2126785f
SHA1

0271c2fff5f9d0a509092727fae5eed0fc96faf5
SHA256

25f32a5b479f153bb5e009d97b1c67975ace08fc0a55c7672365d32296d9d6e1
SHA512

499f3c90288ed2a1aef9cafcf3047fceffdfdf878cf4f26fb0a0c8a25d7c7f53513b5e38c6b311eff9d8280a2df413d756f35665e12c2e8576da3ad801e4c351
SSDEEP

6144:HWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvCwd8IQ3:HWkEuCaNT85I2vCMX5l+ZRvZdfQ3

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

2128 {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

2128 {34184A33-0407-212E-3320-09040709E2C2}.exe
1600 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2128	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2128	{34184A33-0407-212E-3320-09040709E2C2}.exe
1600	{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-1-5-21-557049126-2506969350-2798870634-1000\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_1715bfa5f8e214c5ac3f2cab2126785f_cryptolocker.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 1092 wrote to memory of 2128	1092	2024-03-02_1715bfa5f8e214c5ac3f2cab2126785f_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1092 wrote to memory of 2128	1092	2024-03-02_1715bfa5f8e214c5ac3f2cab2126785f_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1092 wrote to memory of 2128	1092	2024-03-02_1715bfa5f8e214c5ac3f2cab2126785f_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2128 wrote to memory of 1600	2128	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2128 wrote to memory of 1600	2128	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2128 wrote to memory of 1600	2128	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\2024-03-02_1715bfa5f8e214c5ac3f2cab2126785f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-02_1715bfa5f8e214c5ac3f2cab2126785f_cryptolocker.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1092
- 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_1715bfa5f8e214c5ac3f2cab2126785f_cryptolocker.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2128
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w00000220
    3⤵
    - Executes dropped EXE
    PID:1600

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

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

Filesize
390KB

MD5
1715bfa5f8e214c5ac3f2cab2126785f

SHA1
0271c2fff5f9d0a509092727fae5eed0fc96faf5

SHA256
25f32a5b479f153bb5e009d97b1c67975ace08fc0a55c7672365d32296d9d6e1

SHA512
499f3c90288ed2a1aef9cafcf3047fceffdfdf878cf4f26fb0a0c8a25d7c7f53513b5e38c6b311eff9d8280a2df413d756f35665e12c2e8576da3ad801e4c351

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