Action : Use a tool like CyberChef with the "From Base64" and "Remove Null bytes" recipes.
Based on the specific phrasing of your request, this write-up covers the analysis of a common or CTF forensic challenge involving an obfuscated script typically delivered via a file named top code.txt . Challenge Overview Download new top code txt
If the code starts with something like powershell -e or eval() , the content is likely Base64 encoded . Action : Use a tool like CyberChef with
: Identifiable by the == padding or character set A-Z, a-z, 0-9, +, / . Download new top code txt
Check if the script adds a Registry Key ( HKCU\Software\Microsoft\Windows\CurrentVersion\Run ) or a Scheduled Task.
Opening the top code.txt file usually reveals a mess of characters, often using:
The script may use ASCII decimal codes.