M Captcha is a GitHub repository or organization with source code, releases, documentation, or project resources.
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Malimite is a GitHub repository or organization with source code, releases, documentation, or project resources.
MalShare is a community-driven public malware repository that provides free access to malware samples and tooling for the information security community. The site lists recently added samples with SHA256 hashes, file types and submission sources, and offers upload, search, download and API sections along with registration.
masscan is a GitHub repository or organization with source code, releases, documentation, or project resources.
mCaptcha is a proof-of-work based captcha system described as privacy focused and fully automated. It states that it does not track or profile users and does not use IP addresses for rate limiting. The project offers an xCaptcha drop-in replacement, and its APIs are described as compatible with reCAPTCHA and hCaptcha. A guide covers installing the captcha on a website.
Mess with dns is a site for hands-on DNS experiments, offering a subdomain at {{ domain }}.messwithdns.com where records can be added and edited. A live updating list shows requests for the subdomain's records, presented as a low-consequence way to learn by experimenting and breaking things.
Mess With DNS is a GitHub repository or organization with source code, releases, documentation, or project resources.
Metasploit is a penetration testing framework developed as a collaboration between the open source community and Rapid7. It is used to find security issues, verify vulnerability mitigations and manage security assessments. The Metasploit Framework is open source, and Metasploit Pro is a commercial product with support. Documentation and community channels are available for help.
mitmproxy is a free and open source interactive HTTPS proxy. It can be used to intercept, inspect, modify and replay web traffic, including HTTP/1, HTTP/2, HTTP/3, WebSockets and other SSL/TLS-protected protocols. It offers a command line interface, a graphical web interface, and a Python API for writing addons and scripts. Downloads are available for Windows, Linux, macOS and Docker.
Mitmproxy is a GitHub repository or organization with source code, releases, documentation, or project resources.
MITRE ATT&CK is a knowledge base of adversary tactics and techniques based on real-world observations. It is used as a foundation for threat models and methodologies in the private sector, government and cybersecurity community, and is available for use at no charge.
mkcert is a GitHub repository or organization with source code, releases, documentation, or project resources.
MobileApp-Pentest-Cheatsheet is a GitHub repository or organization with source code, releases, documentation, or project resources.
MSTG is a developer resource for coding, documentation, communities, security research, or software tools.
My Infosec Awesome is a GitHub repository or organization with source code, releases, documentation, or project resources.
Nmap is a free open source security scanner and network exploration tool available for Linux, Windows, UNIX and FreeBSD. Its documentation includes a reference guide covering command-line arguments, port scanning techniques, firewall and IDS evasion, and timing and performance, with the man page translated into 15 languages.
NSLookup is a developer resource for coding, documentation, communities, security research, or software tools.
ntop is a developer resource for coding, documentation, communities, security research, or software tools.
Nuclei is a GitHub repository or organization with source code, releases, documentation, or project resources.
NVD is a developer resource for coding, documentation, communities, security research, or software tools.
Observatory is a developer resource for coding, documentation, communities, security research, or software tools.
Open Bug Bounty is a developer resource for coding, documentation, communities, security research, or software tools.
Open Source Security Software is a developer resource for coding, documentation, communities, security research, or software tools.
OpenCVE is a searchable database of CVEs and security vulnerabilities, showing results with vendor, product, update date and CVSS scores. It also offers example searches such as CVEs in KEV and CVEs with high EPSS scores.