ac59dbdded8b11a7511dc44252160dd9e6cb5779098404cdbc25748a9fb2c7f9

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21/02/2024, 16:46

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General

Target

2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe
Size

88KB
MD5

749c8c00f4217a2eb80c22131c511a43
SHA1

5ea3361f9c6835b50a9c71746e7af35e6c63ea48
SHA256

ac59dbdded8b11a7511dc44252160dd9e6cb5779098404cdbc25748a9fb2c7f9
SHA512

948db032d31e6cb23877bb931481cee15aeb8be68c2d4133ec133aee15c6ba79684ad29eb54666c632926b6fd6bb12dc86f4b742cd1350c6739ea9f84986c4f6
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgdPq:AnBdOOtEvwDpj6zQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4288-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000231df-13.dat	CryptoLocker_rule2
behavioral2/memory/4288-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5068-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4288-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000231df-13.dat	CryptoLocker_set1
behavioral2/memory/4288-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5068-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4288-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00090000000231df-13.dat	UPX
behavioral2/memory/4288-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/5068-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5068	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4288-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00090000000231df-13.dat	upx
behavioral2/memory/4288-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/5068-26-0x0000000000500000-0x000000000050F000-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 4288 wrote to memory of 5068	4288	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe	84
PID 4288 wrote to memory of 5068	4288	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe	84
PID 4288 wrote to memory of 5068	4288	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4288
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5068

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
89KB

MD5
66f10ac9dace5b27cf155f407a4d7a4d

SHA1
dfd2267ec7292c1bd65dc968a90303adbb2798ee

SHA256
f6b1b36871d15e0163e7d13cf25a2f189d5eea991c473d76df7867403cd9cc29

SHA512
22de73521c5a30e663bf3847e3b87b7d44189fd4b9ce1daf2d6b23722fe6ec4f8ff09de4ddb2c31e9438154d6aaaeb449acf1a7d03f293e99c81fe9ca04d2916

Download Submit
memory/4288-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4288-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4288-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4288-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4288-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5068-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/5068-25-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/5068-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download