42056eb8c49d847f5940db553bb88a129d05ddc02ac2174b9d240180315c31fa

Analysis

max time kernel
143s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28-03-2024 04:47

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General

Target

2024-03-28_994fa312d3401e630bc0731c85176fab_cryptolocker.exe
Size

35KB
MD5

994fa312d3401e630bc0731c85176fab
SHA1

6e5ebacfb5b9c97c28ce287d250330602d08d0d3
SHA256

42056eb8c49d847f5940db553bb88a129d05ddc02ac2174b9d240180315c31fa
SHA512

8a8aed1dfaf244012e7db719e1afae8f17ab89b26ea25052188dd83dda64e8ec3e0d7d3e528acc5767e41a1662c8dc46e820a35d474bbea1036180c95bc6e851
SSDEEP

384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9/B1RU3q4aKWUn:b7o/2n1TCraU6GD1a4Xt9bRU64hTn

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002322e-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-28_994fa312d3401e630bc0731c85176fab_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4828	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 5020 wrote to memory of 4828	5020	2024-03-28_994fa312d3401e630bc0731c85176fab_cryptolocker.exe	88
PID 5020 wrote to memory of 4828	5020	2024-03-28_994fa312d3401e630bc0731c85176fab_cryptolocker.exe	88
PID 5020 wrote to memory of 4828	5020	2024-03-28_994fa312d3401e630bc0731c85176fab_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-28_994fa312d3401e630bc0731c85176fab_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_994fa312d3401e630bc0731c85176fab_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5020
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4828

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
35KB

MD5
8035888857b0ba59832590b29ddf4804

SHA1
ec6b2c8fb0670e649a44762453583c6825664009

SHA256
462893af6f064b2138803527a3afa9fb5c42023454fd524ab8a832b6b29d7ba8

SHA512
74c779a47d44aff27efc395a30530ce2a57f6152d0283ed062303879f596fb0a97024ed0a5825a01fc722d229bf564cb8a45632202c5a4fce97a1fd369a43cb7

Download Submit
memory/4828-21-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/5020-0-0x00000000022D0000-0x00000000022D6000-memory.dmp

Filesize
24KB

Download
memory/5020-1-0x00000000022D0000-0x00000000022D6000-memory.dmp

Filesize
24KB

Download
memory/5020-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download