ff9fbcb633417dbf0c9db756664f797ee9b60ccba2c440021b34f8f2d3d96a72

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
24/01/2024, 12:34

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-01-24_c4d9ead2d7bb6cc1b88966bd6b9f233a_cryptolocker.exe
Size

42KB
MD5

c4d9ead2d7bb6cc1b88966bd6b9f233a
SHA1

07f9bb1c3a17dac3475254655b4705c3c84f66c3
SHA256

ff9fbcb633417dbf0c9db756664f797ee9b60ccba2c440021b34f8f2d3d96a72
SHA512

caab11e21d69258b13403e3c6e2638e9994f025e1eda52dedde2f7b26efe9ce82476470c37f8ee5d7de990ec6ccd002d9ad3f9d9d069cfe1c93c5427bb9ab700
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMRqmz4kmi:bc/y2lkF0+Bjj4

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000900000002320b-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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-01-24_c4d9ead2d7bb6cc1b88966bd6b9f233a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3164	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 1572 wrote to memory of 3164	1572	2024-01-24_c4d9ead2d7bb6cc1b88966bd6b9f233a_cryptolocker.exe	89
PID 1572 wrote to memory of 3164	1572	2024-01-24_c4d9ead2d7bb6cc1b88966bd6b9f233a_cryptolocker.exe	89
PID 1572 wrote to memory of 3164	1572	2024-01-24_c4d9ead2d7bb6cc1b88966bd6b9f233a_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-24_c4d9ead2d7bb6cc1b88966bd6b9f233a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-24_c4d9ead2d7bb6cc1b88966bd6b9f233a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1572
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:3164

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\rewok.exe

Filesize
42KB

MD5
20a20514d6005e39facdd86e146b3287

SHA1
36ee2e89331efa8ecce816778cc7fe02184ce17e

SHA256
4a19bf52fc88c7a9e8d89dd01604b4093835d8bccb2a59c852b013e5be8cff77

SHA512
0e811705cc0a4401d450e3c9647b033bfa757c6936c97638bd0b0ab6913167bd9f8aa2cebc18f7735eb05db6a6145bafb116f561bacdde3200b252074dfcdb43

Download Submit
memory/1572-0-0x00000000020B0000-0x00000000020B6000-memory.dmp

Filesize
24KB

Download
memory/1572-1-0x00000000020B0000-0x00000000020B6000-memory.dmp

Filesize
24KB

Download
memory/1572-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3164-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download