e059bc121eaaf3bed9728352419e1f50b6c79b902901dd442bfb4fe1399a3582

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/01/2024, 22:55

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General

Target

2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe
Size

45KB
MD5

704af4484e70e67d63855603e0b8639c
SHA1

9f7a0df3b01a22a5bfe7ebad5b314bb1294dac32
SHA256

e059bc121eaaf3bed9728352419e1f50b6c79b902901dd442bfb4fe1399a3582
SHA512

295f3accf94101759270fdc9ae6c170119ff1b97d5ad22040e67eaf6718ca73479768aabab6d4616249c2563f119f4ce935a7b9b620e471327913dce40a2f651
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05WTBL:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6t

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e00000002317b-13.dat	CryptoLocker_rule2
behavioral2/memory/4804-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4324-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4804-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4324-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000e00000002317b-13.dat	UPX
behavioral2/memory/4804-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4324-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4324	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 4804 wrote to memory of 4324	4804	2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe	87
PID 4804 wrote to memory of 4324	4804	2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe	87
PID 4804 wrote to memory of 4324	4804	2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4804
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4324

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
46KB

MD5
7ccd13c6c80f9b82192ba93d6d56236a

SHA1
6c36cfafa9268eafe2cce840cd1575d64e1257dc

SHA256
1bfca39bc85dfae8d796d93f2be7d9f10e7ca32669085d964f3fe1c3d1a2fa34

SHA512
8d5ba1856a635b5c50769a374554a4be417b265966d34ea7a4da6a653c78e436495658e1ff69171875c85609d2da56b95fac483e879c57b72e7884e2de198b7b

Download Submit
memory/4324-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4804-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4804-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4804-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4804-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download