a81ab28d9bb0c0c99d5a93ea70711ebd7a25da6300e527b57fc8e0d80acc437a

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 12:28

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General

Target

2024-05-01_2517490a50f52adf5fd3506e33a88914_cryptolocker.exe
Size

55KB
MD5

2517490a50f52adf5fd3506e33a88914
SHA1

712db91bd47ba39d35aeccbd9bb9dfd1b75cdee5
SHA256

a81ab28d9bb0c0c99d5a93ea70711ebd7a25da6300e527b57fc8e0d80acc437a
SHA512

d251954f44b993e2a96a4070cea987a8fd62278e01c7d1031f2af041b2eefef8747028b32ff35163acdb3c3ad8d9c22476ffacf95ab4836362fbb8195a916d08
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6ImpyM:BbdDmjr+OtEvwDpjM/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3296-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b41-13.dat	CryptoLocker_rule2
behavioral2/memory/628-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3296-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/628-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3296-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/628-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3296-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/628-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3296-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b41-13.dat	UPX
behavioral2/memory/628-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3296-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/628-28-0x0000000000500000-0x0000000000510000-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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-05-01_2517490a50f52adf5fd3506e33a88914_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
628	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 3296 wrote to memory of 628	3296	2024-05-01_2517490a50f52adf5fd3506e33a88914_cryptolocker.exe	83
PID 3296 wrote to memory of 628	3296	2024-05-01_2517490a50f52adf5fd3506e33a88914_cryptolocker.exe	83
PID 3296 wrote to memory of 628	3296	2024-05-01_2517490a50f52adf5fd3506e33a88914_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-01_2517490a50f52adf5fd3506e33a88914_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-01_2517490a50f52adf5fd3506e33a88914_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3296
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:628

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
55KB

MD5
157d17cffd44e338604867553107e63c

SHA1
495bd067dd10551dc449906b9bcbb8963d914ca6

SHA256
8fa7bd02b2f0223533e4a5e4fb7cd5a578cdf681c7db4516ea79edae315e044f

SHA512
4467e08d5316f573ceba4e72c3461d37b2632dcee5de716e84f4e27c125df4d131df771b7bc89119a7958d31cf4f556cb877092102901f68a7f20de78938f590

Download Submit
memory/628-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/628-21-0x0000000000820000-0x0000000000826000-memory.dmp

Filesize
24KB

Download
memory/628-27-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/628-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3296-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3296-1-0x0000000000810000-0x0000000000816000-memory.dmp

Filesize
24KB

Download
memory/3296-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3296-9-0x0000000000810000-0x0000000000816000-memory.dmp

Filesize
24KB

Download
memory/3296-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download