Grim is a free and open-source tool available on GitHub. Grim is used to scanning websites for information gathering and finding vulnerabilities. Grim is written in PHP. It uses PHP script to do reconnaissance. Grim is so powerful that it can detect content management systems while scanning, it can detect IP addresses, it can detect webserver records, it can detect cloud flare information, and can detect robots.txt. Grim can detect WordPress, Drupal, Joomla, and Magento CMS. Grim looks for error-based SQL injections, WordPress sensitive files, and WordPress version-related vulnerabilities. Grim uses different modules for doing all the scanners. WHOIS data collection gives us information about Geo-IP lookup, Banner grabbing, DNS lookup, port scanning, sub-domain information, reverse IP, and MX records lookup.