9a50ae93ba96b526f5fb31f967c95944fe48b081fefd6d93fa50d5250ed71ac4

Analysis

max time kernel
152s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13/03/2024, 09:49

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General

Target

2024-03-13_af97c8b90069d05f808850ef9a5c39f3_cryptolocker.exe
Size

32KB
MD5

af97c8b90069d05f808850ef9a5c39f3
SHA1

62de8f99e63ed2a5abe0b85f503b218cf733115f
SHA256

9a50ae93ba96b526f5fb31f967c95944fe48b081fefd6d93fa50d5250ed71ac4
SHA512

ea0d152f7483399105dae7afd5f229935fc52e0a5b528b7310c5c8500e16c11853181f1bcad8df723d3a27f5c950fce3c310a9f9f10128fc26565ac66bcf51f8
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznUsso2:b/yC4GyNM01GuQMNXw2PSjWo2

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-12.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	2024-03-13_af97c8b90069d05f808850ef9a5c39f3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4332	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 4712 wrote to memory of 4332	4712	2024-03-13_af97c8b90069d05f808850ef9a5c39f3_cryptolocker.exe	96
PID 4712 wrote to memory of 4332	4712	2024-03-13_af97c8b90069d05f808850ef9a5c39f3_cryptolocker.exe	96
PID 4712 wrote to memory of 4332	4712	2024-03-13_af97c8b90069d05f808850ef9a5c39f3_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-13_af97c8b90069d05f808850ef9a5c39f3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_af97c8b90069d05f808850ef9a5c39f3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4712
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4332

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=3952 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
1⤵
PID:3744

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
32KB

MD5
40106219649a2e25f822f661eb7d45a0

SHA1
c6777530d1d93bd5085c20673b5951a98a347412

SHA256
41bedc650456ff375cc6446c92b715ff53da8583320d7557a22a6d397db5f7f2

SHA512
66905c04662751f559bc7c01315a4ab89da86920998cfce256bc5f49ccc705602dd724bae5116608863222b747a8bc4b73b44df62f33c738db7c207571e77134

Download Submit
memory/4332-20-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/4712-0-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/4712-1-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/4712-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download