cryptolocker | d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

Analysis

max time kernel
37s
max time network
39s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
17-02-2024 22:11

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General

Target

CryptoLocker.exe
Size

338KB
MD5

04fb36199787f2e3e2135611a38321eb
SHA1

65559245709fe98052eb284577f1fd61c01ad20d
SHA256

d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9
SHA512

533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444
SSDEEP

6144:sWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWkEuCaNT85I2vCMX5l+ZRv

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

3020 {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

3020 {34184A33-0407-212E-3320-09040709E2C2}.exe
2712 {34184A33-0407-212E-3320-09040709E2C2}.exe
Loads dropped DLL 2 IoCs

Processes:

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

pid process

1700 CryptoLocker.exe
3020 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
3020	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
3020	{34184A33-0407-212E-3320-09040709E2C2}.exe
2712	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
1700	CryptoLocker.exe
3020	{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-1-5-21-1603059206-2004189698-4139800220-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe"	{34184A33-0407-212E-3320-09040709E2C2}.exe

Runs .reg file with regedit 1 IoCs

Processes:

regedit.exe

pid process

2284 regedit.exe

pid	process
2284	regedit.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

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

description	pid	process	target process
PID 1700 wrote to memory of 3020	1700	CryptoLocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1700 wrote to memory of 3020	1700	CryptoLocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1700 wrote to memory of 3020	1700	CryptoLocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1700 wrote to memory of 3020	1700	CryptoLocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3020 wrote to memory of 2712	3020	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3020 wrote to memory of 2712	3020	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3020 wrote to memory of 2712	3020	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 3020 wrote to memory of 2712	3020	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\CryptoLocker.exe
"C:\Users\Admin\AppData\Local\Temp\CryptoLocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1700
- 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\CryptoLocker.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:3020
- - 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:2712

C:\Windows\regedit.exe
"regedit.exe" "C:\Users\Admin\Desktop\WriteGrant.reg"
1⤵
- Runs .reg file with regedit
PID:2284

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
338KB

MD5
04fb36199787f2e3e2135611a38321eb

SHA1
65559245709fe98052eb284577f1fd61c01ad20d

SHA256
d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

SHA512
533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444

Download Submit
memory/2284-9-0x0000000001CA0000-0x0000000001CA1000-memory.dmp

Filesize
4KB

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