33743ebaf50fc6aed826fac05a48d8a5f61701c73e40cb6104b45235e56f10b0

Analysis

max time kernel
126s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 04:31

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General

Target

2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe
Size

42KB
MD5

3b05b83bad2ea449253c73fc6f96d0d2
SHA1

260b3ffbc4a527215dd4eeb42284c6097989e01d
SHA256

33743ebaf50fc6aed826fac05a48d8a5f61701c73e40cb6104b45235e56f10b0
SHA512

5e41eca41835e59b2491079fe65a163489146abc4d928744fc9008953d9b155636e0a66715e127c8c112ff19aa81688dc1e34d2e9d78e8f02daa5da4b6114ba0
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uye/:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZL/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002325a-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1248	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 3184 wrote to memory of 1248	3184	2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe	90
PID 3184 wrote to memory of 1248	3184	2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe	90
PID 3184 wrote to memory of 1248	3184	2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3184
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1248

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3020 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:1768

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
42KB

MD5
c3e9f910712dffc03177ee543f13af6e

SHA1
8e8cc8954c6988d4dc24221b136dda1f731ed6c9

SHA256
56f5ccd7b3d30af0518fc13a6696bac3bb9d623ab40349a627258e75af918d2a

SHA512
b4ea554c7469355895ba5e9a5382230be856d4283f51370a216b3b3b4d2131ad24f8179b9fceff7b5a69553823cc17b27c5125d44b7aa5b78e0b43aed365127a

Download Submit
memory/1248-17-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/3184-0-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3184-1-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3184-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download