645e4c1d998c9eca863ed9dcdef81f624d680b38513cab93c76c2f5d4703ce94

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-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
behavioral1/memory/1620-8-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2340-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2340-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1620-8-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2340-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2340-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1620-8-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2340-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2340-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2340 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe

pid process

1620 2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe

pid	process
2340	asih.exe

pid	process
1620	2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1620-8-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2340-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2340-26-0x0000000000500000-0x000000000050F000-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 4 IoCs

Processes:

2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe

description	pid	process	target process
PID 1620 wrote to memory of 2340	1620	2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe	asih.exe
PID 1620 wrote to memory of 2340	1620	2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe	asih.exe
PID 1620 wrote to memory of 2340	1620	2024-05-22_5697328c6d213238f82802f53ef82030_cryptolocker.exe	asih.exe
PID 1620 wrote to memory of 2340	1620	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⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1620

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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
69KB

MD5
eb15c187c4ec2f988c9036ea78bd4d8c

SHA1
b04b80600eedec9aaedb94abf9f9903ccae89ef4

SHA256
036c7924ff6494f62248c9b19753ad2d9ecbaf5390c9adab7ff200e57dbb14cc

SHA512
70df2c05713fbe9b69b3664f30ee61d572f5b8a893e5cfdf3a5823c6b616a87e1c3424732f022b27c22e22910a2c6299aeb90e2019fd6ecffcb0817654dc741c

Download Submit
memory/1620-0-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1620-1-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/1620-9-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1620-8-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2340-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2340-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2340-18-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2340-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download