1f8b780ba0abadc0487f7360a1f777427cd7b5f9dd16fb4f89b3c440e3c29ae4

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 01:48

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General

Target

2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe
Size

54KB
MD5

6f4d35b5004e187041f3d108804d9c9d
SHA1

68c3050d8cd2d851515bd64b33ed8f3a56fb7310
SHA256

1f8b780ba0abadc0487f7360a1f777427cd7b5f9dd16fb4f89b3c440e3c29ae4
SHA512

52ca5a73d4938d16f42d0fe0fd48fb8487a3314c6bade6cce5f0b50f622f5dfde61e0c91dd8ba4d178b736ebf73718285193dfe85185572c8323aef5fa5f35a8
SSDEEP

768:b7o/2n1TCraU6GD1a4Xcn62tH/1/Lp17zJIfeVEuUr61:bc/y2lm6iH/NLp17zrV9j

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

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

Processes:

2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

rewok.exe

pid process

1512 rewok.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1512	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe

description	pid	process	target process
PID 2600 wrote to memory of 1512	2600	2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe	rewok.exe
PID 2600 wrote to memory of 1512	2600	2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe	rewok.exe
PID 2600 wrote to memory of 1512	2600	2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe	rewok.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_6f4d35b5004e187041f3d108804d9c9d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2600

C:\Users\Admin\AppData\Local\Temp\rewok.exe
"C:\Users\Admin\AppData\Local\Temp\rewok.exe"
2⤵
- Executes dropped EXE
PID:1512

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\rewok.exe
Filesize
55KB

MD5
ec18851ab5dd5961efe9d74699a84c2f

SHA1
894aa78b5e67a658345b2d1f7a2ae99736452742

SHA256
352df23d4e783c067744bcb01688a5c15cf8aaea7497ed01b872f48504111eb1

SHA512
c28a0ff0697cc38454879623fe3f7a82659d3553a45253a8dddb02e4a4c58e959629276a6fc0ff3247c3d32fd054197d26de275071124b6977c670ceb8de51c3

Download Submit
memory/1512-25-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download
memory/2600-0-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/2600-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2600-8-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download