31f5a7dc6c30af9540a4dfc4aba62855e8a1e77ec94d281043fa694ff21bc75a

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 20:51

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General

Target

2024-02-28_c74e6d34f7500848d1196d329376116d_cryptolocker.exe
Size

40KB
MD5

c74e6d34f7500848d1196d329376116d
SHA1

0db5d27d48ab2eee0116ccc76e7901d840362951
SHA256

31f5a7dc6c30af9540a4dfc4aba62855e8a1e77ec94d281043fa694ff21bc75a
SHA512

ba0fc1b7662644bfa71bee4b6db658d042baa4a80ffe2c335af521dd39c9a001c2cba94f0ea227b6aef05b70289835d6d4b6b8a2b9a9b9ffff46b21e244bcc54
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlE2PcE:b/pYayGig5HjS3+2kE

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002322b-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-1-5-21-2727153400-192325109-1870347593-1000\Control Panel\International\Geo\Nation	2024-02-28_c74e6d34f7500848d1196d329376116d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1688	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 4236 wrote to memory of 1688	4236	2024-02-28_c74e6d34f7500848d1196d329376116d_cryptolocker.exe	90
PID 4236 wrote to memory of 1688	4236	2024-02-28_c74e6d34f7500848d1196d329376116d_cryptolocker.exe	90
PID 4236 wrote to memory of 1688	4236	2024-02-28_c74e6d34f7500848d1196d329376116d_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-02-28_c74e6d34f7500848d1196d329376116d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_c74e6d34f7500848d1196d329376116d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1688

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
40KB

MD5
9ae129123e3ce8b0668c2bfc3becfbc4

SHA1
5c322c06d692c017118246dffdbb3fd56bdd7b93

SHA256
d088154f6c2a3a64063f602600c7b2884a3b626d6f01bcc85657f54e4d631d0b

SHA512
e2162f70cb2ebd13d5d3e56ff754466ae95a22c7802ee6475e4c4982c38d09d2d253c428e5e81ff1acc33465a7f0f90795fb75dd9345f98671fad4014a6458a2

Download Submit
memory/1688-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4236-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4236-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4236-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download