590f7c2a93ce8628abf9013dbf48324da51370626480dfc2f4dcc67e7055365d

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2024, 06:35

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General

Target

2024-02-04_9352f1a25b7eb11b56edd67379a438fd_cryptolocker.exe
Size

43KB
MD5

9352f1a25b7eb11b56edd67379a438fd
SHA1

e70ded9db8057f2e9127574429b012263a7bd6f9
SHA256

590f7c2a93ce8628abf9013dbf48324da51370626480dfc2f4dcc67e7055365d
SHA512

b5ac210c8557868b59bcec36cf13aa889fa350f69c1ee69225f6497e50ecc3d963b985fd8a3d8963c73ac116876f591c2d73a5ef93e775ea27f55765def4a609
SSDEEP

384:e/4wODQkzonAYsju5N/surDQtOOtEvwDpjqIGROqS/WccJVJwi2B5oCCM8CLV:79inqyNR/QtOOtEvwDpjBKccJVODvy34

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2204-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231f2-13.dat	CryptoLocker_rule2
behavioral2/memory/2204-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2204-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000231f2-13.dat	CryptoLocker_set1
behavioral2/memory/2204-17-0x0000000000500000-0x000000000050F000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-04_9352f1a25b7eb11b56edd67379a438fd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2108	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 2204 wrote to memory of 2108	2204	2024-02-04_9352f1a25b7eb11b56edd67379a438fd_cryptolocker.exe	42
PID 2204 wrote to memory of 2108	2204	2024-02-04_9352f1a25b7eb11b56edd67379a438fd_cryptolocker.exe	42
PID 2204 wrote to memory of 2108	2204	2024-02-04_9352f1a25b7eb11b56edd67379a438fd_cryptolocker.exe	42

C:\Users\Admin\AppData\Local\Temp\2024-02-04_9352f1a25b7eb11b56edd67379a438fd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_9352f1a25b7eb11b56edd67379a438fd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2108

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
43KB

MD5
51ff7eb44ee5844590ad03b7beb25fa6

SHA1
f5fd5dd723fe766317c242d70d1589a679dba7af

SHA256
3b131611959a69d420a79744decb0a4638cd41689905ae8f9d00e2d5c5387d90

SHA512
82c925f05993081c7a77c0ffc3cedd902bcb9ce03a771a8997b16f504fa450134418167946273ef4e4a5c6f33b611b593f6d4f754c415f91a0d6d8849d57a9a6

Download Submit
memory/2108-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/2108-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2204-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2204-1-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/2204-2-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/2204-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/2204-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download