165a62682ec84da1e62ed5f7062b70b0c7d57270fd32144726fcaad93fc3a499

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
23/02/2024, 02:25

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General

Target

2024-02-23_2b2a495bb554fcad859a552a6688f95a_cryptolocker.exe
Size

38KB
MD5

2b2a495bb554fcad859a552a6688f95a
SHA1

60e001f5859e43bcc0ca98442f4f60dc898e802a
SHA256

165a62682ec84da1e62ed5f7062b70b0c7d57270fd32144726fcaad93fc3a499
SHA512

4a1921349774b1ad3ee711fffe40e53f51e7ed641ca58685b238a58afc209b6f42e7ee08f60688613a4280f4623312fe1d9211619d42fb6fc138f5056a9565b7
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxugfN:b/yC4GyNM01GuQMNXw2PSjHPbSuYlP

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00c300000001e848-12.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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation	2024-02-23_2b2a495bb554fcad859a552a6688f95a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4272	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 4600 wrote to memory of 4272	4600	2024-02-23_2b2a495bb554fcad859a552a6688f95a_cryptolocker.exe	90
PID 4600 wrote to memory of 4272	4600	2024-02-23_2b2a495bb554fcad859a552a6688f95a_cryptolocker.exe	90
PID 4600 wrote to memory of 4272	4600	2024-02-23_2b2a495bb554fcad859a552a6688f95a_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-02-23_2b2a495bb554fcad859a552a6688f95a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_2b2a495bb554fcad859a552a6688f95a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4600
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4272

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
38KB

MD5
77f88ed15633cb668ec1b1feec0bc69b

SHA1
a3fe2246f35ada0f611236a4604419134b621ffd

SHA256
9f59e5c40da9230cb5f88c3de14844d11d48f6807d973776134efbf71330bf16

SHA512
79ec5e28d0b904677c2d57217ff4ec7aed847e25bf6f9d22ef703303eea56bd1985ce302755e49ec79760bf7d6aca33bdccf011965f1d8997c64a747b1c988c4

Download Submit
memory/4272-25-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download
memory/4600-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4600-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/4600-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download