0275c36961156e3dfb9d4ddf8f2053fd25a976d7c15a5cf2cb4ac2ed00f11557

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16-03-2024 10:30

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-16_483fe60da44fe208e6052ecee9e88a88_cryptolocker.exe
Size

49KB
MD5

483fe60da44fe208e6052ecee9e88a88
SHA1

2d59875bfafc000882ca80a6942006c8ffb6f77d
SHA256

0275c36961156e3dfb9d4ddf8f2053fd25a976d7c15a5cf2cb4ac2ed00f11557
SHA512

9e18ba972ac116a57958786a254bb1de488e1a0c3c3ef253c72aa3aa83430a3294aa85e0590825daee408e97b0e2657dc7535165b4edb13df1beb504ff3a84a1
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQPdUvK:BbdDmjr+OtEvwDpjMXn

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2532-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_rule2
behavioral2/memory/2532-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2940-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2532-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2940-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2532-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001e980-13.dat	UPX
behavioral2/memory/2532-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2940-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-03-16_483fe60da44fe208e6052ecee9e88a88_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2940	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 2532 wrote to memory of 2940	2532	2024-03-16_483fe60da44fe208e6052ecee9e88a88_cryptolocker.exe	89
PID 2532 wrote to memory of 2940	2532	2024-03-16_483fe60da44fe208e6052ecee9e88a88_cryptolocker.exe	89
PID 2532 wrote to memory of 2940	2532	2024-03-16_483fe60da44fe208e6052ecee9e88a88_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-16_483fe60da44fe208e6052ecee9e88a88_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-16_483fe60da44fe208e6052ecee9e88a88_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2532
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2940

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
50KB

MD5
eb8c292d61681580062486400ed0acd1

SHA1
d838985ce2b75817156f573148690ecdfe58b229

SHA256
66ed4b0ac277366d8f2e2389845e5981c4fd1e32c8884011af31cb6fd26aa048

SHA512
541c4617fbf4a3338da97d91b0cb105c793ff45823a2526d5985d7ec8c870e50fe823ceaae8b8f4e5742fb7485461366b88a21b3d055559bfd4a8938188db0cf

Download Submit
memory/2532-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2532-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2532-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2532-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2532-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2940-19-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/2940-20-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2940-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download