af1308a0f02277ee4dfec31fe7599defd245ea30993273ff7bebceb6073d13bc

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
23-05-2024 00:28

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General

Target

2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe
Size

60KB
MD5

26f9eb22205b21dee337a91f3030e699
SHA1

22196e361a45d420adc663843e87b792259a5ec4
SHA256

af1308a0f02277ee4dfec31fe7599defd245ea30993273ff7bebceb6073d13bc
SHA512

7f2cf54ebf7cc7ba9f1b281e8474f00b4fd1573b893a927a8db40021b4a7a90973c70bc2777916681d353b1ef4327fa64d5e05c4256a69c2e965fe2cff8f91e6
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3J:z6a+CdOOtEvwDpjQ+

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4576-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4576-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3732-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3732-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4576-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4576-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3732-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3732-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4576-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4576-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3732-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3732-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3732 asih.exe

pid	process
3732	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4576-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4576-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3732-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3732-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe

description	pid	process	target process
PID 4576 wrote to memory of 3732	4576	2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe	asih.exe
PID 4576 wrote to memory of 3732	4576	2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe	asih.exe
PID 4576 wrote to memory of 3732	4576	2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_26f9eb22205b21dee337a91f3030e699_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4576

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3732

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
776268f74a35457cdff13ce5a70a5470

SHA1
47b33b92ee3f3b04ca648b41bc53e3f435ea9309

SHA256
ef2570d410c83036342248d5a516aa480fb8b182d6a309db700e9fc7e3ea7267

SHA512
1163510d9e125927b9158890f63afb44e7ff0bd266bfe736a5f6fc2d16d97834184a08298d3678d0fdb2bb3b2f000bd6faf78fe3971a5fd391bfad2702a81be5

Download Submit
memory/3732-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3732-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3732-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3732-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4576-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4576-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4576-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4576-9-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4576-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download