1b35844d6d9a7478662ced47a32880881429099188c37a157e72af312028c659

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
22-05-2024 19:57

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General

Target

2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe
Size

39KB
MD5

7586af0b27c2facefbeb740da435ede3
SHA1

97b32764e22e1deb11080ecbc60ec7d2e6736c0c
SHA256

1b35844d6d9a7478662ced47a32880881429099188c37a157e72af312028c659
SHA512

6becb201136c3f4029346fd346b0c63e56d684e16081638210cc3c6c8fde1c3bd1fcee77c180b226d02e564713f49ffd42fe582d9237141a10371564d0d7aef9
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaaUr:qDdFJy3QMOtEvwDpjjWMl7TdaUr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2296-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3292-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2296-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2296-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3292-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2296-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2296-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3292-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2296-28-0x0000000000500000-0x0000000000510000-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:

2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2296 asih.exe

pid	process
2296	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2296-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3292-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2296-28-0x0000000000500000-0x0000000000510000-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:

2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe

description	pid	process	target process
PID 3292 wrote to memory of 2296	3292	2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe	asih.exe
PID 3292 wrote to memory of 2296	3292	2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe	asih.exe
PID 3292 wrote to memory of 2296	3292	2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_7586af0b27c2facefbeb740da435ede3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3292

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2296

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
39KB

MD5
134ef8527142e89e560e6600dc197e00

SHA1
275bef770b46f889d591d3e623a630365af7efc1

SHA256
1e400c29a78227b858722fde60863284303040bef69fc84f80edc1f81060af2e

SHA512
29b8b370c3fb832519ec4512e8089b0bd3178d0dfb39cdcb061caf809c7644c54896aa0e198c098929c74f8cb0794c703480c15c2bad0eed7a8d3567c0c11269

Download Submit
memory/2296-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2296-21-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/2296-27-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2296-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3292-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3292-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3292-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3292-2-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/3292-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download