357dc930fbe276ee14e28aa85a9b1b1932db9bf300204dfcb8a8ffa4c84c66ec

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 04:41

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General

Target

2024-04-19_f5db45cf1775e3fb8a86d4f37e092649_cryptolocker.exe
Size

30KB
MD5

f5db45cf1775e3fb8a86d4f37e092649
SHA1

ed238cb4906810dbc61dae4b47ebaf08e0f5f7f7
SHA256

357dc930fbe276ee14e28aa85a9b1b1932db9bf300204dfcb8a8ffa4c84c66ec
SHA512

1318d24f1a2da84a00fcc51f1b1504b611ea23a27f10a3deb1abf9de310b403cbc9b8df1ea5efa641ca958f4d10c1d372d7f23262b32e20c6892d28e6dec0ee4
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+U/h:b/yC4GyNM01GuQMNXum+4

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e97c-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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	2024-04-19_f5db45cf1775e3fb8a86d4f37e092649_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4976	retln.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 5104 wrote to memory of 4976	5104	2024-04-19_f5db45cf1775e3fb8a86d4f37e092649_cryptolocker.exe	85
PID 5104 wrote to memory of 4976	5104	2024-04-19_f5db45cf1775e3fb8a86d4f37e092649_cryptolocker.exe	85
PID 5104 wrote to memory of 4976	5104	2024-04-19_f5db45cf1775e3fb8a86d4f37e092649_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-19_f5db45cf1775e3fb8a86d4f37e092649_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_f5db45cf1775e3fb8a86d4f37e092649_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5104
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4976

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\retln.exe

Filesize
30KB

MD5
d03d59f9c1af9925dd462e6474c08f26

SHA1
c489a730aa359d7b788cabf782dabc8bc1e121fe

SHA256
e1e6b664815e3c6c3a6868fddbb45ffa602f9be5c2bb497f4d26c26fdf907408

SHA512
29ddfdd55bf10ed0fa371591da1dea629e3a5d650e1115b53374436cdfca32b00a3fa09a5e81ad3fddafb38e2a51b6ad6707fc19ddf8ad8b83b5ff4df012ff55

Download Submit
memory/4976-20-0x0000000002010000-0x0000000002016000-memory.dmp

Filesize
24KB

Download
memory/5104-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/5104-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/5104-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download