65c0a9fc5443682091d804236d2068791dda7fa90134494ec4cecef61044715f

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 01:36

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General

Target

2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe
Size

40KB
MD5

2c71ada3c343219a0543048cb6e4e709
SHA1

d33cfeddc3323ae5823bf23a59bd6e501ba6fd27
SHA256

65c0a9fc5443682091d804236d2068791dda7fa90134494ec4cecef61044715f
SHA512

e1ccf4ffae9c64d3c11389c8ae99e447f39086e572308d92045935f63b8a1879d8dc03851d7f2c9c1cc2066f39345ed2525871b4658f25bc1a0243b0b9601d8c
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBcK:qDdFJy3QMOtEvwDpjjWMl7TdB

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3628-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3628-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/640-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3628-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3628-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/640-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3628-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3628-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/640-27-0x0000000000500000-0x0000000000510000-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:

2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

640 asih.exe

pid	process
640	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3628-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3628-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/640-27-0x0000000000500000-0x0000000000510000-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:

2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe

description	pid	process	target process
PID 3628 wrote to memory of 640	3628	2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe	asih.exe
PID 3628 wrote to memory of 640	3628	2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe	asih.exe
PID 3628 wrote to memory of 640	3628	2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_2c71ada3c343219a0543048cb6e4e709_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3628

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:640

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
40KB

MD5
fd215c6521e00f27e593b269910677f0

SHA1
5d9bd32d0ef3bfc8f657135a811453932b25bc37

SHA256
13b415b17b2929a0813bb05d6c6bedddb8b4314daf7b2a4f4927a613ed992cc4

SHA512
958acd3a1708cab6df44a769472a54e4951212bf001d60c6adac7efcbe32bf0f373406151a74f003d1a8a9f598da772b1de4071f0ff68202f4e9c5dae2bc1e37

Download Submit
memory/640-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/640-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/640-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3628-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3628-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3628-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3628-9-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3628-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download