4f6eac81491de19f2d50c8ffcd39b9175396285065fc6fc30e0382de52d40a08

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 03:34

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General

Target

2024-05-02_58e89e9a727299ff51df49d3f4573089_cryptolocker.exe
Size

42KB
MD5

58e89e9a727299ff51df49d3f4573089
SHA1

fff92d9ac9d2890964b506d4483b0aab1528e869
SHA256

4f6eac81491de19f2d50c8ffcd39b9175396285065fc6fc30e0382de52d40a08
SHA512

7dd094ae5e387d332ba40fe8f2bbb9d28178979a6b6b9aedc11fcf4e9fa4fe6d3ee36607a1b603d6427817baa8c06654b68c5c6636076d096305d2f21cff3d24
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uy7:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZM

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023444-12.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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-02_58e89e9a727299ff51df49d3f4573089_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2764	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 3360 wrote to memory of 2764	3360	2024-05-02_58e89e9a727299ff51df49d3f4573089_cryptolocker.exe	84
PID 3360 wrote to memory of 2764	3360	2024-05-02_58e89e9a727299ff51df49d3f4573089_cryptolocker.exe	84
PID 3360 wrote to memory of 2764	3360	2024-05-02_58e89e9a727299ff51df49d3f4573089_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-02_58e89e9a727299ff51df49d3f4573089_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-02_58e89e9a727299ff51df49d3f4573089_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3360
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2764

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
42KB

MD5
75ac5573c24f98fde61d7b234c6c5882

SHA1
747a29812bca716661f1eb46533cbdee4e575187

SHA256
570a0167bcfcb735f5195e47d5ffa0b61271b48931eccaa85107ee5d1b6ef661

SHA512
4c017e7b15ceda4a83d06090f347d9abf785d6cb2ec7200a0abb0fd9221eaa82c0399867b261dbb830eb06cefe8c68ea1c78900a7f4b990ee69af545392e4fbb

Download Submit
memory/2764-25-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/3360-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3360-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3360-8-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download