cryptolocker | 437a0d2bed2209bc137dd68d740ff0bb96300ed85e487499c8a22a5688677596

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 21:01

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General

Target

2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe
Size

406KB
MD5

dcb8b7138da61e6a19334de2634e1f37
SHA1

20a7adf65f3d726e55a5d3f7c80ef9f5a472ef80
SHA256

437a0d2bed2209bc137dd68d740ff0bb96300ed85e487499c8a22a5688677596
SHA512

e47adefe6a8a1e1e1fb556a49a9089be9289f4432e682bd882b21131d120d81cf07c1cbdce51ff99e220efa2d8eb0e3730db0fb416868044bec7899430e3c263
SSDEEP

6144:QWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvCI3i:QWkEuCaNT85I2vCMX5l+ZRvd

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

2284 {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

2284 {34184A33-0407-212E-3320-09040709E2C2}.exe
2464 {34184A33-0407-212E-3320-09040709E2C2}.exe
Loads dropped DLL 2 IoCs

Processes:

2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

pid process

2868 2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe
2284 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2284	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2284	{34184A33-0407-212E-3320-09040709E2C2}.exe
2464	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2868	2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe
2284	{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-1-5-21-1298544033-3225604241-2703760938-1000\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_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 2868 wrote to memory of 2284	2868	2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2868 wrote to memory of 2284	2868	2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2868 wrote to memory of 2284	2868	2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2868 wrote to memory of 2284	2868	2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2284 wrote to memory of 2464	2284	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2284 wrote to memory of 2464	2284	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2284 wrote to memory of 2464	2284	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2284 wrote to memory of 2464	2284	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-02_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2868

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_dcb8b7138da61e6a19334de2634e1f37_cryptolocker.exe"
2⤵
- Deletes itself
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2284

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:2464

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
406KB

MD5
dcb8b7138da61e6a19334de2634e1f37

SHA1
20a7adf65f3d726e55a5d3f7c80ef9f5a472ef80

SHA256
437a0d2bed2209bc137dd68d740ff0bb96300ed85e487499c8a22a5688677596

SHA512
e47adefe6a8a1e1e1fb556a49a9089be9289f4432e682bd882b21131d120d81cf07c1cbdce51ff99e220efa2d8eb0e3730db0fb416868044bec7899430e3c263

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