066fc54d79acb5e4c2e55d494422d2650b8df2e0e5327cd4a0b7b932781f79fb

Analysis

max time kernel
148s
max time network
157s
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 15:36

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General

Target

2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe
Size

59KB
MD5

575f7f0102adcf4a00acd3efd8b05c5a
SHA1

b5a74f5855f8bfdeefd5005faff3ced0147219c0
SHA256

066fc54d79acb5e4c2e55d494422d2650b8df2e0e5327cd4a0b7b932781f79fb
SHA512

027332813efb56e33247b97518ce1105cad24e514e87105a166321f1d3fdefa4a5d1108b59826bb1968d2c7c58bec44306cd8f9af0ae4262966515f226896caa
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPjP:H6QFElP6n+gou9cvMOtEvwDpjCpVXu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3516-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3516-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4780-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4780-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3516-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3516-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4780-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4780-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3516-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3516-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4780-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4780-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_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_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4780 asih.exe

pid	process
4780	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3516-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3516-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4780-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4780-27-0x0000000000500000-0x0000000000510000-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_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe

description	pid	process	target process
PID 3516 wrote to memory of 4780	3516	2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe	asih.exe
PID 3516 wrote to memory of 4780	3516	2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe	asih.exe
PID 3516 wrote to memory of 4780	3516	2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_575f7f0102adcf4a00acd3efd8b05c5a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3516

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4780

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
60KB

MD5
56e4ca1ccf06777865758c1fccde79dc

SHA1
bd53804faed7f8dc585bdeabbd7f5c241c46d3ca

SHA256
18277a3aa38ed9c275f33847d2c035d16039286eb44f7d1e873972a16f28e794

SHA512
2f739496ec01d7d10c5a0f752817e30e4d732a2bcdb7ca800be1fbddbdb367e7cade818029c7e660c3b7a0019663913aaf59ea8efe4b2bf6ff0ee5f16497cbd8

Download Submit
memory/3516-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3516-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3516-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3516-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3516-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4780-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4780-21-0x0000000001F80000-0x0000000001F86000-memory.dmp

Filesize
24KB

Download
memory/4780-20-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/4780-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download