27db1adedb259708b37f30499d9f9b0daf2702d6a9f64f8e04c15d8b4e1dc3cf

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 04:56

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General

Target

2024-04-20_fee6d2d24343cf827f5f1e5d298c4073_cryptolocker.exe
Size

35KB
MD5

fee6d2d24343cf827f5f1e5d298c4073
SHA1

0aaaf918fcaee22bcb9ec04ee19ae1eb8258d0ed
SHA256

27db1adedb259708b37f30499d9f9b0daf2702d6a9f64f8e04c15d8b4e1dc3cf
SHA512

568abc911eb52e598314e0085483705394f8a8676257d1fdc41cdbd7702bd28d2e42a02d976046e95984c3994ad193918b8a70b0404d0c2f69b07df5566b1bb2
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjxur:b/yC4GyNM01GuQMNXw2PSjH+PPxi

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e970-12.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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	2024-04-20_fee6d2d24343cf827f5f1e5d298c4073_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3476	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 1304 wrote to memory of 3476	1304	2024-04-20_fee6d2d24343cf827f5f1e5d298c4073_cryptolocker.exe	84
PID 1304 wrote to memory of 3476	1304	2024-04-20_fee6d2d24343cf827f5f1e5d298c4073_cryptolocker.exe	84
PID 1304 wrote to memory of 3476	1304	2024-04-20_fee6d2d24343cf827f5f1e5d298c4073_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-20_fee6d2d24343cf827f5f1e5d298c4073_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_fee6d2d24343cf827f5f1e5d298c4073_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1304
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3476

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
36KB

MD5
1a3d9c0b28924853bd3369435a38aa6a

SHA1
4ff3a0430a192f31cb7ed0e09dc854f5f6898bdc

SHA256
021466d1de25a0aa0286fc21d15338fef845c727d4309cf5c5dcd8d9fbde8bb6

SHA512
e7ad13c2168673567aef3ed53ceff6702ee43a5fc767b5e14d229bba2c786a02c34c53e6041c144aa4ca3d442dbae21a00b57744d1ec4daab1d5ef2e68ba9b6a

Download Submit
memory/1304-0-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/1304-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/1304-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3476-21-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download