Analysis
- user interaction
yes - max time kernel
18s - max time network
14s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows - submitted
02/11/2026, 21:41
Static task
static1
Behavioral task
behavioral1
Sample
nuclear_stealer.py
Resource
win10v2004-20260911-en
windows10-2004-x64
7 signatures
150 seconds
General
- Target nuclear_stealer.py
- Size 8KB
- Sample261102-1j3laszv8m
- SHA256 5ce51717566c164170fbc95fc428120fe357c990e5c84bb4cb192461009a55da
- MD5 fb5ad446a55f8e1ba358ae0115d96091
- SHA1 aabddc348f31aa513fb6c0e9bd2fcef86a025939
- SHA512 73d8c8e30b154593c900e11105426cb24eff96793052ea533963f49347ecf9ed1153c6f9b68e4762b318468a70002926c83c44a76fb43a86aa4c33642956a06f
- SSDEEP 192:3r//X/v/5nSSGgnib2UENFcb9by2+E6xZtCskwivC5nn/dnVwCCtiLXSjR7n:3r1lNFvcw66nFn2FRD
- TLSH T1FC12EA90ED5D1402C5F3ABCC0843C0E5E7167323562259263DFC56449FBA8B5E2E4ABE
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
3/10
Malware Config
Signatures
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
pid Process 3752 cmd.exe - Modifies registry class 18 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\py_auto_file\shell\open\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1" OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\Local Settings cmd.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\Local Settings OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\py_auto_file\shell\edit OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\py_auto_file\shell\open\command OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\py_auto_file OpenWith.exe Set value (str) \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\.py\ = "py_auto_file" OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\㡟샎㓺耀Ă OpenWith.exe Set value (str) \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\㡟샎㓺耀Ă\ = "py_auto_file" OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\㡞샏㔀蠀PVL OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\py_auto_file\shell OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\py_auto_file\shell\edit\command OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\㡙샌㘀踀 OpenWith.exe Set value (str) \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\㡙샌㘀踀\ = "py_auto_file" OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\.py OpenWith.exe Set value (str) \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\㡞샏㔀蠀PVL\ = "py_auto_file" OpenWith.exe Set value (str) \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\py_auto_file\shell\edit\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1" OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-240542094-4193773837-3211495583-1000_Classes\py_auto_file\shell\open OpenWith.exe - Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2420 NOTEPAD.EXE - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 724 OpenWith.exe - Suspicious use of SetWindowsHookEx 45 IoCs
pid Process 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe 724 OpenWith.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 724 wrote to memory of 2420 724 OpenWith.exe 94
Processes
-
C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\nuclear_stealer.py1⤵
- Executes a command shell one-liner
- Modifies registry class
PID:3752
-
C:\Windows\system32\OpenWith.exeC:\Windows\system32\OpenWith.exe -Embedding1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:724 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\nuclear_stealer.py2⤵
- Opens file in notepad (likely ransom note)
PID:2420
-