d5c8504b4703d11121f5b4bb384b6744003ef1e977c54c78248261a3ef064118

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 12:14

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General

Target

2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe
Size

41KB
MD5

acead2b433f1a84389c04925ece11cfc
SHA1

bcbb03c4f99cbea4ca8c6292b6dd13614acc175d
SHA256

d5c8504b4703d11121f5b4bb384b6744003ef1e977c54c78248261a3ef064118
SHA512

fbf65a93af2cc0901380a3349052524fe1bacffdb3b8045425e1dec22f1e98519a83d3e7c19d7bb98ac6a54b9c295df75b6b94d32c53c4e6c50910657a6fd118
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAC:b/pYayGig5HjS3NPAC

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000002321a-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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4328	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 1568 wrote to memory of 4328	1568	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe	84
PID 1568 wrote to memory of 4328	1568	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe	84
PID 1568 wrote to memory of 4328	1568	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1568
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4328

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
ed6a532ec0fef1e9d41d38df6da32df0

SHA1
4f8c770b3b8be88e9d4c963d4127652a9e6ff171

SHA256
86f0b0535813c6ab1f969d6b1018642c424a3773b8ad1dd78e4429de9481a942

SHA512
22a4cf6ab964c4ee4c479d979fe20515afa4fc6f965c1b2a0e1e939b4a3b4f1f75524b0afd59168ac7027fb6fee23b3b303fc2de9049ca1b1e90d9b837e49062

Download Submit
memory/1568-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1568-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1568-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4328-22-0x0000000002020000-0x0000000002026000-memory.dmp

Filesize
24KB

Download