Malware Analysis Report

2025-06-15 20:19

Sample ID 241217-dya39szncj
Target noifyy.exe
SHA256 b86dfa689d1acc6652361e3b3f86d61839f859201d625f5c8d6ccbe21538ddd8
Tags
pyinstaller pysilon
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 Overview

score
10/10

SHA256

b86dfa689d1acc6652361e3b3f86d61839f859201d625f5c8d6ccbe21538ddd8

Threat Level: Known bad

The file noifyy.exe was found to be: Known bad.

Malicious Activity Summary

pyinstaller pysilon

Pysilon family

Detect Pysilon

Detects Pyinstaller

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Modifies registry class

Opens file in notepad (likely ransom note)

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-17 03:24

Signatures

Detect Pysilon

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

Pysilon family

pysilon

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-17 03:24

Reported

2024-12-17 03:26

Platform

win10ltsc2021-20241211-en

Max time kernel

74s

Max time network

69s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\discord_token_grabber.pyc

Signatures

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1411052346-3904498293-150013998-1000_Classes\Local Settings C:\Windows\system32\cmd.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1411052346-3904498293-150013998-1000_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 WriteProcessMemory

Description Indicator Process Target
PID 4724 wrote to memory of 2380 N/A C:\Windows\system32\OpenWith.exe C:\Windows\system32\NOTEPAD.EXE
PID 4724 wrote to memory of 2380 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\discord_token_grabber.pyc

C:\Windows\system32\OpenWith.exe

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --string-annotations=is-enterprise-managed=no --field-trial-handle=5056,i,13034162257960464555,14563862583435181672,262144 --variations-seed-version --mojo-platform-channel-handle=4084 /prefetch:8

C:\Windows\system32\NOTEPAD.EXE

"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\discord_token_grabber.pyc

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --lang=en-US --service-sandbox-type=service --string-annotations=is-enterprise-managed=no --field-trial-handle=3224,i,13034162257960464555,14563862583435181672,262144 --variations-seed-version --mojo-platform-channel-handle=5068 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
GB 2.20.12.74:80 msedge.b.tlu.dl.delivery.mp.microsoft.com tcp
US 8.8.8.8:53 edge.microsoft.com udp
US 8.8.8.8:53 edge.microsoft.com udp
US 204.79.197.239:443 edge.microsoft.com tcp
US 8.8.8.8:53 edgeassetservice.azureedge.net udp
US 8.8.8.8:53 edgeassetservice.azureedge.net udp
US 13.107.246.64:443 edgeassetservice.azureedge.net tcp
US 13.107.21.239:443 edge.microsoft.com tcp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 edge.microsoft.com udp
US 8.8.8.8:53 edge.microsoft.com udp
US 13.107.21.239:443 edge.microsoft.com tcp
US 8.8.8.8:53 msedge.b.tlu.dl.delivery.mp.microsoft.com udp
US 199.232.214.172:80 msedge.b.tlu.dl.delivery.mp.microsoft.com tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

N/A