b237d394239901d8c724faeca0c4163d61ef365f680dc491814929076dfe38aa

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2024, 03:33

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General

Target

2024-01-28_940bbbe16537cd9530880f6ddb301944_cryptolocker.exe
Size

41KB
MD5

940bbbe16537cd9530880f6ddb301944
SHA1

6a0716162dc968a3acbf820b15a20177093f059a
SHA256

b237d394239901d8c724faeca0c4163d61ef365f680dc491814929076dfe38aa
SHA512

efd321772c1099457005da59d9d307719090078b5b8dc32f2cfc14f7927de9fde6048f33b861af0c2cca3ed6851abfda9bc8ad5d9903fe7d0244199edf9279fd
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMRqB:bc/y2lkF0+BjB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231fa-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-01-28_940bbbe16537cd9530880f6ddb301944_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4836	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 4508 wrote to memory of 4836	4508	2024-01-28_940bbbe16537cd9530880f6ddb301944_cryptolocker.exe	88
PID 4508 wrote to memory of 4836	4508	2024-01-28_940bbbe16537cd9530880f6ddb301944_cryptolocker.exe	88
PID 4508 wrote to memory of 4836	4508	2024-01-28_940bbbe16537cd9530880f6ddb301944_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-28_940bbbe16537cd9530880f6ddb301944_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_940bbbe16537cd9530880f6ddb301944_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4508
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4836

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
e98ed5977a1db40fc32501a6cc5f9a70

SHA1
a975a0ea134f396382f3692737b93ee733557607

SHA256
5acc50f2f6a341971862a787160924a9f7cf2c60eb3e50854b3156f6c4604cd1

SHA512
8661bb6221c07e568b018ad2edc086c5fcde41d3e186e65e0511251fd49c407acc930500d48035498e430ed08eac18fdcde5f0a2eb65da3dea6efac3a992beee

Download Submit
memory/4508-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/4508-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/4508-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4836-20-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download