f5971f458df5ab5a358885d52c299036e5e5f0b5e8f15d8c4990cd65bacc8cc1

General

Target

2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe
Size

39KB
MD5

ef5c2253a927fd29b7850d5c7be75538
SHA1

a18ba1397394c8184a8fb54b7b05d0ecbed528c8
SHA256

f5971f458df5ab5a358885d52c299036e5e5f0b5e8f15d8c4990cd65bacc8cc1
SHA512

7f20d5b44b5c734d7d29c8d72bc022c3124b57e43a247cb24ffce6000de4116ca1f5b1906e35e0da9e85e80f4cad82db7fd324bd578168dcf1a6dbc46d337e62
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK3A4s:qUmnpomddpMOtEvwDpjjaYaQPs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1688-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2936-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2936-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1688-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2936-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2936-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1688-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2936-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2936-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2936 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe

pid process

1688 2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe

pid	process
2936	asih.exe

pid	process
1688	2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1688-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2936-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2936-27-0x0000000000500000-0x000000000050F000-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 4 IoCs

Processes:

2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe

description	pid	process	target process
PID 1688 wrote to memory of 2936	1688	2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe	asih.exe
PID 1688 wrote to memory of 2936	1688	2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe	asih.exe
PID 1688 wrote to memory of 2936	1688	2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe	asih.exe
PID 1688 wrote to memory of 2936	1688	2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_ef5c2253a927fd29b7850d5c7be75538_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1688

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
39KB

MD5
e4a128ee6898d014e78f179453dd4415

SHA1
8868a71b8d6215804125984e1cd98ef141610ac9

SHA256
897b9947fe5db3669e8d889e37858283ec455924b55553ec4c00f4446ca45258

SHA512
ba676ca513934ea2a5baddbb2233d6c5a98f4570b04a2f3f4cb645ba88da743daf7d90e7160b91f53706c30a7d6eb8b1a906118749fba02a311b6d3bee77b7e9

Download Submit
memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1688-1-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1688-9-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1688-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/1688-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2936-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2936-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2936-26-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2936-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads