Wireshark is a free and open-source packet analyzer.

wireshark

Windows

MacOS

Linux

An advanced monitoring tool for Windows that shows real-time file system, Registry and process/thread activity.

procmon

Quietly and anonymously bruteforce Active Directory usernames at insane speeds from Domain Controllers by (ab)using LDAP Ping requests (cLDAP)

Ldapnomnom

dotPeek is a free-of-charge standalone tool based on ReSharper's bundled decompiler. It can reliably decompile any .NET assembly into equivalent C# or IL code.

dotPeek

Fuzz anything with Program Environment Fuzzing

RRFuzz

Unofficial revival of the well known .NET debugger and assembly editor, dnSpy.

dnSpyEx

DLL and PowerShell script to assist with finding DLL hijacks

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Discover the best Compiled Application pentesting and infosec tools, updated every day.