150f4f30ee5437c517ffa80998c06a8279fcbebc87848e83b607efb37e19e0a7

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 01:41

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General

Target

2024-05-31_8b0fb0f03f72b17329e7dc26d2c16d72_cryptolocker.exe
Size

31KB
MD5

8b0fb0f03f72b17329e7dc26d2c16d72
SHA1

c9950eedfed9b3eb38fc9ab069916b01a140271d
SHA256

150f4f30ee5437c517ffa80998c06a8279fcbebc87848e83b607efb37e19e0a7
SHA512

6c8746a892f4567f695487d9fe08c8476ae0b25519a64e8fb0ea0791f212150b24a4a470326a673dc1abc57553b62ffd2c8f367ee0b6403cb244a53c5f03750f
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+U8Ss87vhD:b/yC4GyNM01GuQMNXum+NSnD

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002328e-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-31_8b0fb0f03f72b17329e7dc26d2c16d72_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5044	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 2692 wrote to memory of 5044	2692	2024-05-31_8b0fb0f03f72b17329e7dc26d2c16d72_cryptolocker.exe	82
PID 2692 wrote to memory of 5044	2692	2024-05-31_8b0fb0f03f72b17329e7dc26d2c16d72_cryptolocker.exe	82
PID 2692 wrote to memory of 5044	2692	2024-05-31_8b0fb0f03f72b17329e7dc26d2c16d72_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-31_8b0fb0f03f72b17329e7dc26d2c16d72_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_8b0fb0f03f72b17329e7dc26d2c16d72_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:5044

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
31KB

MD5
15e322949f7d5f82c0ca156cf8f5838f

SHA1
3bdd51a804397d9ea9acb8a128859ecd58a70c23

SHA256
df095f9730d2aab78b3827201d67cccd35589798a5b1ca4d9fec8eff83ac74cb

SHA512
2f929180650fadbeb28dee242ccbfcf42e4183be770e131b416ce1e52cc89442a8d31a54ac422b267592ddeb66c1e3b282e089bfc3652368447e20a4d170f178

Download Submit
memory/2692-0-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2692-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-8-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/5044-25-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download