a173b4a276fe1ee16e6e7bce888abd2ea0170407b7e875eab3b79bed1efef0b0

Analysis

max time kernel
149s
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
24-05-2024 04:27

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General

Target

2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe
Size

37KB
MD5

45351ee660f8ad6df78cbc62de3ceb53
SHA1

e64992bc032a1f99a9d1319c2c63a48b2db268ba
SHA256

a173b4a276fe1ee16e6e7bce888abd2ea0170407b7e875eab3b79bed1efef0b0
SHA512

5f65317107579f9f32f1a602c725c5bbc059536748c0cd449ef3538cc3f267658376219cc3b3d69854b601b6cdeb838d4b8e375b9abed623f6d21b53850523ae
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5ax+NE:qUmnpomddpMOtEvwDpjjaYar

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/660-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2596-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/660-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2596-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/660-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2596-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/660-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2596-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/660-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2596-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/660-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2596-27-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2596 asih.exe

pid	process
2596	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/660-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2596-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/660-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2596-27-0x0000000000500000-0x000000000050F000-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

Processes:

2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe

description	pid	process	target process
PID 660 wrote to memory of 2596	660	2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe	asih.exe
PID 660 wrote to memory of 2596	660	2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe	asih.exe
PID 660 wrote to memory of 2596	660	2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_45351ee660f8ad6df78cbc62de3ceb53_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:660

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2596

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
37KB

MD5
dda73f71d8be4aead82da238ad7eff9d

SHA1
712a4e3da11c9be56df02a7d52a43dc8beb6f28f

SHA256
3b9fb0a91d15b79c3a1c2a2c950753cb89cf7e6bb17583d9bbd019e289299b96

SHA512
5d8697b85e85b230de89327436fa6cad902d47486e5d538ac7833a8d64147d414d3118f3f7d0bd2e4eb27e7fadb5cb0eb28d55a8b95bd335446f9a44a7c57ff3

Download Submit
memory/660-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/660-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/660-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/660-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/660-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2596-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2596-20-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/2596-26-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/2596-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download