41b04927140c6e41051d8f2b18b89cec1210ce47d61b4dece463d59c5175c360

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
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
behavioral2/memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023383-13.dat	CryptoLocker_rule2
behavioral2/memory/2816-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1932-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1932-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023383-13.dat	CryptoLocker_set1
behavioral2/memory/2816-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1932-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1932-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000d000000023383-13.dat	UPX
behavioral2/memory/2816-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1932-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1932-28-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1932	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000d000000023383-13.dat	upx
behavioral2/memory/2816-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1932-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1932-28-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 2816 wrote to memory of 1932	2816	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe	85
PID 2816 wrote to memory of 1932	2816	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe	85
PID 2816 wrote to memory of 1932	2816	2024-06-02_63ba45a37b4bfc5ee5641d4ddc7d8736_cryptolocker.exe	85

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⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1932

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
39KB

MD5
91d1c0e802c9f18bde1e4db6e17f471e

SHA1
e4b6ebc7497ede1e72fc1f1ac9196df212374265

SHA256
353ef8c919a0b1fa28ef78c889983998fc70c0d96b61dafa27686b5c14bf43e5

SHA512
c247f61a505dd09e4eb418521690dc0c661287b361b6f1d17d9df60540ef500e77f75dafc80dc719ce71a072d075a34973cded646eb3c674f01a0d846a6702e0

Download Submit
memory/1932-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1932-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1932-22-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1932-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2816-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2816-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2816-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2816-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2816-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download