Malware Analysis Report

2024-11-30 12:35

Sample ID 231021-cndwqseb82
Target GraveYard.Client.rar
SHA256 c597e0fc16402b1e4d03969819fa2c30ecc1e9969da2f688251a7d32f9214e77
Tags
pyinstaller pysilon quasar
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

c597e0fc16402b1e4d03969819fa2c30ecc1e9969da2f688251a7d32f9214e77

Threat Level: Known bad

The file GraveYard.Client.rar was found to be: Known bad.

Malicious Activity Summary

pyinstaller pysilon quasar

Detect Pysilon

Quasar payload

Pysilon family

Quasar family

Detects Pyinstaller

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Modifies registry class

Opens file in notepad (likely ransom note)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-10-21 02:13

Signatures

Detect Pysilon

Description Indicator Process Target
N/A N/A N/A N/A

Pysilon family

pysilon

Quasar family

quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A

Detects Pyinstaller

pyinstaller
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
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N/A N/A N/A N/A
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Analysis: behavioral1

Detonation Overview

Submitted

2023-10-21 02:13

Reported

2023-10-21 02:15

Platform

win10-20231020-en

Max time kernel

28s

Max time network

22s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\GraveYard.Client\mods\flyapi.config

Signatures

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-459651055-4136032345-1270294931-1000_Classes\Local Settings C:\Windows\system32\cmd.exe N/A
Key created \REGISTRY\USER\S-1-5-21-459651055-4136032345-1270294931-1000_Classes\Local Settings C:\Windows\system32\OpenWith.exe N/A

Opens file in notepad (likely ransom note)

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\NOTEPAD.EXE N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\system32\OpenWith.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A
N/A N/A C:\Windows\system32\OpenWith.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2336 wrote to memory of 4480 N/A C:\Windows\system32\OpenWith.exe C:\Windows\system32\NOTEPAD.EXE
PID 2336 wrote to memory of 4480 N/A C:\Windows\system32\OpenWith.exe C:\Windows\system32\NOTEPAD.EXE

Processes

C:\Windows\system32\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\GraveYard.Client\mods\flyapi.config

C:\Windows\system32\OpenWith.exe

C:\Windows\system32\OpenWith.exe -Embedding

C:\Windows\system32\NOTEPAD.EXE

"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\GraveYard.Client\mods\flyapi.config

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-21 02:13

Reported

2023-10-21 02:19

Platform

win10v2004-20231020-en

Max time kernel

178s

Max time network

253s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\GraveYard.Client\mods\flyapi.config

Signatures

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1511405631-3522522280-778892991-1000_Classes\Local Settings C:\Windows\system32\OpenWith.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1511405631-3522522280-778892991-1000_Classes\Local Settings C:\Windows\system32\cmd.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\OpenWith.exe N/A

Processes

C:\Windows\system32\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\GraveYard.Client\mods\flyapi.config

C:\Windows\system32\OpenWith.exe

C:\Windows\system32\OpenWith.exe -Embedding

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 29.81.57.23.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 126.177.238.8.in-addr.arpa udp
US 8.8.8.8:53 23.173.189.20.in-addr.arpa udp

Files

N/A