645e4c1d998c9eca863ed9dcdef81f624d680b38513cab93c76c2f5d4703ce94

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 02:34

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General

Target

2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe
Size

69KB
MD5

5697328c6d213238f82802f53ef82030
SHA1

e3ca4fdf48fa5169fa9d8785b2097cdc245864d5
SHA256

645e4c1d998c9eca863ed9dcdef81f624d680b38513cab93c76c2f5d4703ce94
SHA512

ecd75c6cf1dee23d4fd53a0314bacf7b9d9f6e969d0293fa8ab23407327282fabb55ee24449a308e028838f695844617162b4a6f8178e82756ba2cfa21f50db8
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1Pa:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAa

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2060-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2396-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2060-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2396-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2060-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2396-27-0x0000000000500000-0x000000000050F000-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_5697328c6d213238f82802f53ef82030_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2396 asih.exe

pid	process
2396	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2060-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2396-27-0x0000000000500000-0x000000000050F000-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_5697328c6d213238f82802f53ef82030_cryptolocker.exe

description	pid	process	target process
PID 2060 wrote to memory of 2396	2060	2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe	asih.exe
PID 2060 wrote to memory of 2396	2060	2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe	asih.exe
PID 2060 wrote to memory of 2396	2060	2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2060

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2396

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
69KB

MD5
eb15c187c4ec2f988c9036ea78bd4d8c

SHA1
b04b80600eedec9aaedb94abf9f9903ccae89ef4

SHA256
036c7924ff6494f62248c9b19753ad2d9ecbaf5390c9adab7ff200e57dbb14cc

SHA512
70df2c05713fbe9b69b3664f30ee61d572f5b8a893e5cfdf3a5823c6b616a87e1c3424732f022b27c22e22910a2c6299aeb90e2019fd6ecffcb0817654dc741c

Download Submit
memory/2060-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2060-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2060-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2060-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2060-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2396-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2396-26-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/2396-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download