6ca9909d57350a102ab33ac5d31f68f4f2369de83297ed31ab93ec9d0e1a6d0b

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 09:51

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General

Target

2024-02-22_881d5895d2f4d7075735acb478b95074_cryptolocker.exe
Size

44KB
MD5

881d5895d2f4d7075735acb478b95074
SHA1

121045e0b311aeb76e0a8045e1103d94de7630bf
SHA256

6ca9909d57350a102ab33ac5d31f68f4f2369de83297ed31ab93ec9d0e1a6d0b
SHA512

69833fc62cbfaa374ba0355761ae4489fbb093b7eb826a71a3199f8e84a2c94326c751c2302c057c6bf5abfc2aa374e1f9a1a420dc6050cee8542d7be3f08c96
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMRqmz4kmmIPTMx:bc/y2lkF0+BjjIIbQ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023112-12.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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	2024-02-22_881d5895d2f4d7075735acb478b95074_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1408	rewok.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 2684 wrote to memory of 1408	2684	2024-02-22_881d5895d2f4d7075735acb478b95074_cryptolocker.exe	87
PID 2684 wrote to memory of 1408	2684	2024-02-22_881d5895d2f4d7075735acb478b95074_cryptolocker.exe	87
PID 2684 wrote to memory of 1408	2684	2024-02-22_881d5895d2f4d7075735acb478b95074_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-02-22_881d5895d2f4d7075735acb478b95074_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_881d5895d2f4d7075735acb478b95074_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2684
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:1408

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\rewok.exe

Filesize
44KB

MD5
f4cf4b7780f2c43903f0bb060c533b21

SHA1
6a4afea2e0c0e2663b3ba7a19e439c6e8104d68c

SHA256
52703a7e0338375ed99c705a7b3bc9b7a995e0a81a86cc0f6cb60c6567097520

SHA512
c5f19fe94c74f206b2b67a64547d94cdc1d02bd166e6d1c96458a2346ce5db0f4e94f09c290b2070ddcae6755aabddf9286579d9541c56e8cb1e8992c47451a3

Download Submit
memory/1408-19-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/2684-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2684-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2684-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download