b53d863ce3c44f4f5dce292f7ab452aa3f50c811cc0ff71f0d330638d8d932c9

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
22-05-2024 02:27

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General

Target

2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe
Size

74KB
MD5

2eab676d9833ba238655c327eff894ee
SHA1

582701ce5ca73b64a5fefe501e0e9d3eae17cdb0
SHA256

b53d863ce3c44f4f5dce292f7ab452aa3f50c811cc0ff71f0d330638d8d932c9
SHA512

d3b52e1bff1d6ce7c7a355c77cffedde1edc8c1e05a2611e10c79cde48a1b8ec587c1437e1231fea4ec5539b8e7d7b05caedf6c224bd16d43ae3dddae7c38284
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81Gu:1nK6a+qdOOtEvwDpj3

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4808-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4808-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1888-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1888-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4808-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4808-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1888-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1888-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4808-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4808-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1888-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1888-27-0x0000000000500000-0x000000000050F311-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:

2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1888 asih.exe

pid	process
1888	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4808-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4808-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1888-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1888-27-0x0000000000500000-0x000000000050F311-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:

2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe

description	pid	process	target process
PID 4808 wrote to memory of 1888	4808	2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe	asih.exe
PID 4808 wrote to memory of 1888	4808	2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe	asih.exe
PID 4808 wrote to memory of 1888	4808	2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_2eab676d9833ba238655c327eff894ee_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4808

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1888

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
75KB

MD5
9d8c7d0df04bdb6108b6cc1728cbf7a0

SHA1
936e22b22bbb3284fbc6524f1b3838be6f312826

SHA256
2bf410f8e363158c63aa2921f07c21f277df68b01ab2ea33681b7687a089a3e0

SHA512
893f16475af1173e6b95ba6127394f21af58e21e8600bc0f29d6caffa1cec173a14790ccb70c95e27c559717b3f7c54b381bdcaab70b0e7899bcc495453dbb07

Download Submit
memory/1888-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1888-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/1888-26-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/1888-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4808-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4808-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4808-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4808-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4808-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download