Open Source PowerShell Cybersecurity Tools

Deffend.net Otus aims to help small companies and individuals to avoid cyber security threats through cyber hygiene. It runs on Windows desktop and looks for misconfigurations that may result in cyber security risks. Ensuring cyber hygiene is the first step of preventing cyber security threats. Otus will help to individuals who lack cyber security knowledge and to companies who can not afford getting cyber security consultancy.

Deffend.net Sihas aims to help small companies and individuals to avoid cyber security threats through cyber hygiene. It runs on Windows desktop and looks for misconfigurations that may result in cyber security risks. Ensuring cyber hygiene is the first step of preventing cyber security threats. Sihas will help to individuals who lack cyber security knowledge and to companies who can not afford getting cyber security consultancy.

reverse-skill is a cybersecurity skill router for AI coding agents working on authorized reverse engineering, penetration testing, CTF, and security research tasks. It analyzes the target type and directs the agent to an appropriate methodology instead of relying on improvised commands. Its playbooks cover Android and iOS applications, native binaries, .NET, JavaScript, firmware, malware, APIs, supply chains, and other specialized scenarios. The package checks locally available tools and can bootstrap supporting scripts, MCP servers, and utilities when needed. Scope gates, case initialization, timelines, evidence chains, reports, and field journals encourage repeatable and auditable work. It supports clients such as Claude Code, Codex CLI, Cursor, and Cline across Windows, Linux, macOS, and Kali Linux. The repository also preserves reusable lessons so later investigations can avoid previously documented mistakes.