137f4335f6e09e27f1e1b52bcc7830859605d0ac203c2ba90793b924ec4a56be

Analysis

max time kernel
155s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07/03/2024, 08:23

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General

Target

2024-03-07_25a6a92a88e99c1649bc920fdc17083d_cryptolocker.exe
Size

42KB
MD5

25a6a92a88e99c1649bc920fdc17083d
SHA1

803c591e4986a775e42afd2d90381c3314a0bdf2
SHA256

137f4335f6e09e27f1e1b52bcc7830859605d0ac203c2ba90793b924ec4a56be
SHA512

9ae6a60b4945e891c073b8ff0c0c2f87b25e8124cbf57086efc2cea32c2f9427f2e493305c8bfda1c8710c28e2f861e365a28c58c6bf228ef77b54970c8f7c11
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMpheDgA:bc/y2lkF0+Be0gA

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231ff-11.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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-03-07_25a6a92a88e99c1649bc920fdc17083d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
900	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 3104 wrote to memory of 900	3104	2024-03-07_25a6a92a88e99c1649bc920fdc17083d_cryptolocker.exe	91
PID 3104 wrote to memory of 900	3104	2024-03-07_25a6a92a88e99c1649bc920fdc17083d_cryptolocker.exe	91
PID 3104 wrote to memory of 900	3104	2024-03-07_25a6a92a88e99c1649bc920fdc17083d_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-03-07_25a6a92a88e99c1649bc920fdc17083d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_25a6a92a88e99c1649bc920fdc17083d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3104
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:900

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
43KB

MD5
ec5b217d7b7e88bab33e61a53fced335

SHA1
4275ee585d325ad8a95d34300e9607a80ffec561

SHA256
c17bdb7352f13a51db81bfe7f5b64898c0ccf8421a186caf39594a3b7ef4f3a2

SHA512
f6c8e6e5dec76022a77bdfd6434ad2082df0e8aa9968a5d0dce53525b5c491f1ad629dec49c8b785a907888cb73905b05ad3084e9a4b980ab3248c7a75d50e3e

Download Submit
memory/900-22-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/3104-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3104-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3104-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download