41b04927140c6e41051d8f2b18b89cec1210ce47d61b4dece463d59c5175c360

Analysis

max time kernel
141s
max time network
144s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02/06/2024, 20:58

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General

Target

2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe
Size

38KB
MD5

63ba45a37b4bfc5ee5641d4ddc7d8736
SHA1

8565292d192ef670e9b31b65722706c83b033eb2
SHA256

41b04927140c6e41051d8f2b18b89cec1210ce47d61b4dece463d59c5175c360
SHA512

6d0449e4ee121b2f4cf6803ecd30439d71e21529c95e099520142ec4d69e90fac36e1b4b326d919fa0e558754c5e4365305d4f44e51539c599540ac765eba86d
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK38noa:qUmnpomddpMOtEvwDpjjaYaQ8b

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2180-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122b8-11.dat	CryptoLocker_rule2
behavioral1/memory/2180-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2180-13-0x00000000025C0000-0x00000000025CF000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2504-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2180-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d0000000122b8-11.dat	CryptoLocker_set1
behavioral1/memory/2180-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2180-13-0x00000000025C0000-0x00000000025CF000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2504-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2180-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000d0000000122b8-11.dat	UPX
behavioral1/memory/2180-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2180-13-0x00000000025C0000-0x00000000025CF000-memory.dmp	UPX
behavioral1/memory/2504-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2504	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2180	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2180-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000d0000000122b8-11.dat	upx
behavioral1/memory/2180-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2180-13-0x00000000025C0000-0x00000000025CF000-memory.dmp	upx
behavioral1/memory/2504-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 2180 wrote to memory of 2504	2180	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe	28
PID 2180 wrote to memory of 2504	2180	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe	28
PID 2180 wrote to memory of 2504	2180	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe	28
PID 2180 wrote to memory of 2504	2180	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2504

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

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

Filesize
39KB

MD5
91d1c0e802c9f18bde1e4db6e17f471e

SHA1
e4b6ebc7497ede1e72fc1f1ac9196df212374265

SHA256
353ef8c919a0b1fa28ef78c889983998fc70c0d96b61dafa27686b5c14bf43e5

SHA512
c247f61a505dd09e4eb418521690dc0c661287b361b6f1d17d9df60540ef500e77f75dafc80dc719ce71a072d075a34973cded646eb3c674f01a0d846a6702e0

Download Submit
memory/2180-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2180-1-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2180-9-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2180-2-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/2180-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2180-13-0x00000000025C0000-0x00000000025CF000-memory.dmp

Filesize
60KB

Download
memory/2504-19-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/2504-26-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/2504-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download