fea575ddb8a664aeb1d89d5276bd7878895f4895cb76219666dd74d4ba910eae

Analysis

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

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 10:31

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General

Target

2024-02-19_7c07ed03da907ae30bb8b17cb9842345_cryptolocker.exe
Size

41KB
MD5

7c07ed03da907ae30bb8b17cb9842345
SHA1

3a749f300253d6501513cde0cc99d82637affb3b
SHA256

fea575ddb8a664aeb1d89d5276bd7878895f4895cb76219666dd74d4ba910eae
SHA512

057cb74bab04ca2dd3d9f9e4e8cb6aa562457151f3ec18f384febe6ac9bf5ad6f067ddb691345454526b70afebaa67d4e9ce6d34604a877c330f0cf25ad344ba
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PADu:b/pYayGig5HjS3NPA6

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00080000000231b1-12.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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	2024-02-19_7c07ed03da907ae30bb8b17cb9842345_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5004	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 2460 wrote to memory of 5004	2460	2024-02-19_7c07ed03da907ae30bb8b17cb9842345_cryptolocker.exe	79
PID 2460 wrote to memory of 5004	2460	2024-02-19_7c07ed03da907ae30bb8b17cb9842345_cryptolocker.exe	79
PID 2460 wrote to memory of 5004	2460	2024-02-19_7c07ed03da907ae30bb8b17cb9842345_cryptolocker.exe	79

C:\Users\Admin\AppData\Local\Temp\2024-02-19_7c07ed03da907ae30bb8b17cb9842345_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_7c07ed03da907ae30bb8b17cb9842345_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:5004

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
355ce31c464393dafd6f50a11fbfa4f5

SHA1
4337ffd997c7778147d81ccbabca0c488e02fb22

SHA256
6da20fbd8845d9918fcbbc7e55167816b373448a6e4d41e07201fdb97c118ad7

SHA512
36f38fcf3874bbcc3e68be9159960e984214f6a8a750d976c2e0c2c575a6e962d71e1c5a8041c509cee62d20fcdd22b9bb1a5bb4f8c73f53d3b53e59c1621ba4

Download Submit
memory/2460-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2460-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2460-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5004-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download