4babcb8b10817b15c2afd1f56357ba366cb66c1694f4b6fc6df19e537fea05ca

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23/05/2024, 01:23

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

2024-05-23_31e4fa0b1031669fcf132dfbaa171875_cryptolocker.exe
Size

67KB
MD5

31e4fa0b1031669fcf132dfbaa171875
SHA1

bd480e0b04d88196f19195ae4b4117c7b9d58683
SHA256

4babcb8b10817b15c2afd1f56357ba366cb66c1694f4b6fc6df19e537fea05ca
SHA512

1ac1502bc04e5d0b5755922881bd44481bdfb17e6f684ee7a606f432ae76bc0b85a374854b616d80cd7bcc575377f670b36782ce786e2b40a901ddae8ddec81f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRQ:1nK6a+qdOOtEvwDpj9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023278-13.dat	CryptoLocker_rule2
behavioral2/memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4524-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023278-13.dat	CryptoLocker_set1
behavioral2/memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4524-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0006000000023278-13.dat	UPX
behavioral2/memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4524-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-05-23_31e4fa0b1031669fcf132dfbaa171875_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4524	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0006000000023278-13.dat	upx
behavioral2/memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4524-26-0x0000000000500000-0x000000000050F311-memory.dmp	upx

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 3668 wrote to memory of 4524	3668	2024-05-23_31e4fa0b1031669fcf132dfbaa171875_cryptolocker.exe	83
PID 3668 wrote to memory of 4524	3668	2024-05-23_31e4fa0b1031669fcf132dfbaa171875_cryptolocker.exe	83
PID 3668 wrote to memory of 4524	3668	2024-05-23_31e4fa0b1031669fcf132dfbaa171875_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-23_31e4fa0b1031669fcf132dfbaa171875_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_31e4fa0b1031669fcf132dfbaa171875_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3668
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4524

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
67KB

MD5
4cfb4509349bdd1ba0bc8c9887ac33ad

SHA1
2157c9e6b27b149bff018560d0c398237995a2f0

SHA256
ef17edbb3f447b11834dce1cf56e5ed06cae3064c54356794b3cb70e4c45d92a

SHA512
1799930f5cfd096db667903745fdadcce13f505e0efe695164b1fd9b101613a2e55ec6ca99e473a1ccb4be702b0cf2564c6bdb6939b7f3f4a8331926abaf7258

Download Submit
memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3668-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3668-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3668-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4524-25-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/4524-19-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4524-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download