e2138ee1489bd8814ffda72ca316e5182411b75da240ad967dbd6fb0a49bcf3d

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/04/2024, 02:32

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General

Target

2024-04-06_3f87611f620fd7b3db23bcdc4f5ab441_cryptolocker.exe
Size

35KB
MD5

3f87611f620fd7b3db23bcdc4f5ab441
SHA1

e6945e146ea008c1a3e5c7ad8af2259a71b7b56b
SHA256

e2138ee1489bd8814ffda72ca316e5182411b75da240ad967dbd6fb0a49bcf3d
SHA512

e8b0fcaff9ff5d31aff1f0d304e739d204b4f07492d1c6b9ae68652f2231c2b0dfd2112e680e059392028e4b9265d37909cdfdd4c5b5cddae7a6e0db2c6bc706
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8INBjPO:b/yC4GyNM01GuQMNXw2PSj1Pqq8oBjW

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002321f-12.dat	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-04-06_3f87611f620fd7b3db23bcdc4f5ab441_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1976	retln.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2224 wrote to memory of 1976	2224	2024-04-06_3f87611f620fd7b3db23bcdc4f5ab441_cryptolocker.exe	87
PID 2224 wrote to memory of 1976	2224	2024-04-06_3f87611f620fd7b3db23bcdc4f5ab441_cryptolocker.exe	87
PID 2224 wrote to memory of 1976	2224	2024-04-06_3f87611f620fd7b3db23bcdc4f5ab441_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-06_3f87611f620fd7b3db23bcdc4f5ab441_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_3f87611f620fd7b3db23bcdc4f5ab441_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
35KB

MD5
e9783b4ad6ece1cccfc1dfc3c56e2ba9

SHA1
7cc2f1dbfec57bfad4da1a0385bdb4cb84347ed2

SHA256
15e90d2959c9fb6f1a86f5f49b4ca288876a7118ad786c0e5d19abb8bd0d6c60

SHA512
f3ec1ccfb1f2d055764069b735c2fcbd43ad356409e8176133454751b386763d7d3866fc9c11de2f9fb47034aeee98d9196e68aa339385ddfc398d38809e2c4a

Download Submit
memory/1976-19-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download
memory/2224-0-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/2224-1-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/2224-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download