33b5af081e460ef2f61b810dc7eab8dd716d414a4b7916ec30d02b11cdf13860

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28-05-2024 15:44

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General

Target

2024-05-28_e8f449e58be3b56429fb7aa80a56a2a2_cryptolocker.exe
Size

38KB
MD5

e8f449e58be3b56429fb7aa80a56a2a2
SHA1

07cd1acbeecd2f109cd8c86a5d03258db7b865d0
SHA256

33b5af081e460ef2f61b810dc7eab8dd716d414a4b7916ec30d02b11cdf13860
SHA512

c4cc29471aa60579da6065c2799537d3a4e40d46756bff1d7e8cc838c97e63a2f5d3648eb1168a59a60f680e8730754b4a407c135c9e9dc0b8df41c89a85d255
SSDEEP

768:b7o/2n1TCraU6GD1a4Xt9bRU6zA6o36mrD:bc/y2lLRU6zA6q/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00090000000233c1-12.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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-28_e8f449e58be3b56429fb7aa80a56a2a2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4804	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 1020 wrote to memory of 4804	1020	2024-05-28_e8f449e58be3b56429fb7aa80a56a2a2_cryptolocker.exe	82
PID 1020 wrote to memory of 4804	1020	2024-05-28_e8f449e58be3b56429fb7aa80a56a2a2_cryptolocker.exe	82
PID 1020 wrote to memory of 4804	1020	2024-05-28_e8f449e58be3b56429fb7aa80a56a2a2_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-28_e8f449e58be3b56429fb7aa80a56a2a2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_e8f449e58be3b56429fb7aa80a56a2a2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1020
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4804

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
38KB

MD5
99bee5667f853b3e165c519ae62d07e5

SHA1
eb5a4b45c67f41743f00b4b8e50f74288ebfcf32

SHA256
162bd83750d10eee3d92f3acf0c297c81ef26c48bc97c5447df80f31834b4ff4

SHA512
873154a5a4be4e37b104d435e1b466f910241e53508b926fdb3103ec7ccb1161bac4ac3dcf39ca425a960e1dfa02e50c171ad0e2177d3b3546a3a57a9c5de36f

Download Submit
memory/1020-0-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/1020-1-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/1020-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4804-25-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download