a2c7bb78b7210bef61e3af859d650054ccb7e32a322ebcbe62db303a0c48d239

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
23/02/2024, 16:56

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General

Target

2024-02-23_fb3d07fd5f7ba731c198a6253fa338be_cryptolocker.exe
Size

41KB
MD5

fb3d07fd5f7ba731c198a6253fa338be
SHA1

e3ca3c09b430b18df8ef24f0f640dea2fd553d95
SHA256

a2c7bb78b7210bef61e3af859d650054ccb7e32a322ebcbe62db303a0c48d239
SHA512

b850b2bb3fe58955aa5d714d40a30a350481b710c17d56ab4b5a35bfa41a7ac1f79b391a422b95b31e3b8def7b7148d0569da72101dd5a29700f4a1fb1ac1512
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMpheY:bc/y2lkF0+BeF

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002303a-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-1-5-21-1392040655-2056082574-619088944-1000\Control Panel\International\Geo\Nation	2024-02-23_fb3d07fd5f7ba731c198a6253fa338be_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4032	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 3816 wrote to memory of 4032	3816	2024-02-23_fb3d07fd5f7ba731c198a6253fa338be_cryptolocker.exe	86
PID 3816 wrote to memory of 4032	3816	2024-02-23_fb3d07fd5f7ba731c198a6253fa338be_cryptolocker.exe	86
PID 3816 wrote to memory of 4032	3816	2024-02-23_fb3d07fd5f7ba731c198a6253fa338be_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-23_fb3d07fd5f7ba731c198a6253fa338be_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_fb3d07fd5f7ba731c198a6253fa338be_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3816
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4032

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
41KB

MD5
a084a5ba6c751cb7c1a927370cb4a77e

SHA1
5833281843876ee7b0aaea17534701d3be137d98

SHA256
7bfd08fc9cf8f727d637da96230c4c5281a1e00cf5c40ae019f03d705af39aac

SHA512
00189224a2d9f13a788dd2fe9b0b1021b3df1803f726ae807d41cf5ec40a8f67d90ded87b2a7e7cbbda074b0609148b33cae818e221fc99f577edd4260882f59

Download Submit
memory/3816-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3816-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3816-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4032-25-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download