4f9eb9f111321dc8822b004ab0c14ea525d17d64d5ce9592a5349e26f322859b

Analysis

max time kernel
150s
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
05/03/2024, 15:32

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General

Target

2024-03-05_63957ec72fa27ba6e1cea660bf863e8e_cryptolocker.exe
Size

69KB
MD5

63957ec72fa27ba6e1cea660bf863e8e
SHA1

7aa54f8939bbcdcf6dda7c58eb48469dcb4145dc
SHA256

4f9eb9f111321dc8822b004ab0c14ea525d17d64d5ce9592a5349e26f322859b
SHA512

b0526818d3419a5ada6fe9b17a47cb2bfd5371bb0300fbda8e8b88725abaf0c450cc52a425bab7231a594cefbecac774f724bd0d9a0d66f216141591e0a6eb04
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUJ9:DW60sllyWOtEvwDpjwF85t

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4364-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023332-13.dat	CryptoLocker_rule2
behavioral2/memory/560-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4364-19-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4364-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023332-13.dat	CryptoLocker_set1
behavioral2/memory/560-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4364-19-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-05_63957ec72fa27ba6e1cea660bf863e8e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
560	asih.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 4364 wrote to memory of 560	4364	2024-03-05_63957ec72fa27ba6e1cea660bf863e8e_cryptolocker.exe	97
PID 4364 wrote to memory of 560	4364	2024-03-05_63957ec72fa27ba6e1cea660bf863e8e_cryptolocker.exe	97
PID 4364 wrote to memory of 560	4364	2024-03-05_63957ec72fa27ba6e1cea660bf863e8e_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-03-05_63957ec72fa27ba6e1cea660bf863e8e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_63957ec72fa27ba6e1cea660bf863e8e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4364
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:560

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=3404 --field-trial-handle=2232,i,11267738607351977302,107266978269557304,262144 --variations-seed-version /prefetch:8
1⤵
PID:4500

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\asih.exe

Filesize
69KB

MD5
6f6381ccfd5cbf1f529b314e7e0ed74a

SHA1
51e6eebbdf4a7aae5e0d5b0d9155518d8faab113

SHA256
2a6ab50985af7ba74060db60569ebf70fe6835ddd4608424f157d0a7f35afa88

SHA512
c0facd8e7339bde78fb5f707691626c61a200b43077d0c950749e4af4e78b6cb71d06311a8ea250d6b66f76fc54415912d6c8569e0a8e96bc7243f4f81247e1a

Download Submit
memory/560-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/560-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/560-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4364-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4364-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4364-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4364-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4364-19-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download