c9be42ac696b454d042458a92c90e666ad78ef98c21f726de5aa3ea58b64a274

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 12:42

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General

Target

2024-02-14_0ffc9e071b6f61cf8a6571f8b61459b7_cryptolocker.exe
Size

40KB
MD5

0ffc9e071b6f61cf8a6571f8b61459b7
SHA1

26428c6f542a93af5d3238fea33775b0f200d9b0
SHA256

c9be42ac696b454d042458a92c90e666ad78ef98c21f726de5aa3ea58b64a274
SHA512

62a82afea3af393c26e2e48702d75da2e2d61159a94d285d04847d0a020bfb2359a4c2237e38ec3eed043dbcceb5b8d3b5f101b8dd05cbdac78d500c05a5e64d
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAsX:b/pYayGig5HjS3NPAsX

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231ea-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-14_0ffc9e071b6f61cf8a6571f8b61459b7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1896	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 2284 wrote to memory of 1896	2284	2024-02-14_0ffc9e071b6f61cf8a6571f8b61459b7_cryptolocker.exe	83
PID 2284 wrote to memory of 1896	2284	2024-02-14_0ffc9e071b6f61cf8a6571f8b61459b7_cryptolocker.exe	83
PID 2284 wrote to memory of 1896	2284	2024-02-14_0ffc9e071b6f61cf8a6571f8b61459b7_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-14_0ffc9e071b6f61cf8a6571f8b61459b7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_0ffc9e071b6f61cf8a6571f8b61459b7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1896

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
41KB

MD5
87293239ab4f5f8462041207efdb261c

SHA1
ede15f09f23fff56563e7e8c08b01e5e334f0937

SHA256
1c709d530c5ba89c8840ad696c1592bcf007d5db586a92fc206b63a22e9dd973

SHA512
95a8fda940a95c3b7d2cb12daa32ebffa22c97bab8db2a6e1766d6d279c6f8ad5fb3b8295eb3ef191b3288f71a15b01a4e11c61aaa7a335ecd91201fdea402aa

Download Submit
memory/1896-22-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/2284-0-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/2284-1-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/2284-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download