8bbd6b32d88137612d4c944aaa0cec90a13ffe4550a53aac0826304095ec68a5

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:29

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe
Size

66KB
MD5

5c998288d9291a67b44adc886a12d1e5
SHA1

fb036c8b03d8a7a5bf0f4529446f1f793207c6e7
SHA256

8bbd6b32d88137612d4c944aaa0cec90a13ffe4550a53aac0826304095ec68a5
SHA512

99632ba27fd7c1d0c31ed727bd9a0f9eb3fe3f41e9106b7e382779bca50b3fae4450dfaba96273189389f8669afd3dd0c10a3764c8b4cf512c52ad51fc3868b3
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDyf5:1nK6a+qdOOtEvwDpjG

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2148-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4332-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4332-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2148-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4332-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4332-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2148-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4332-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4332-27-0x0000000000500000-0x000000000050F311-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

Processes:

2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4332 asih.exe

pid	process
4332	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2148-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2148-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4332-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4332-27-0x0000000000500000-0x000000000050F311-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

Processes:

2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe

description	pid	process	target process
PID 2148 wrote to memory of 4332	2148	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe	asih.exe
PID 2148 wrote to memory of 4332	2148	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe	asih.exe
PID 2148 wrote to memory of 4332	2148	2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_5c998288d9291a67b44adc886a12d1e5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2148

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4332

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
66KB

MD5
6a6280cdfff7bd01481bb470e849feb3

SHA1
c46e455a9528b1408d7353c486f499a9da1d0400

SHA256
b7f25a1a3179d0c323e3666bd224ac8f3be6f0fbbd5663b2e84c0d586bbfe98b

SHA512
b7cff2f6f0cda40494568bb37a15d12d7553082622a38c8d079887797250df5f140c87f66914136192a18b387bbefcc73345964acb1b8e3456ccaceed52747f5

Download Submit
memory/2148-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2148-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2148-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2148-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2148-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4332-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4332-20-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4332-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4332-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download