Sub-Drill

Sub-Drill is a straightforward script designed for penetration testers and bug bounty hunters to discover subdomains for a given domain using free online services, eliminating the need for API keys. It provides a pipe-able solution that aggregates subdomain data from multiple sources such as ThreatCrowd, CRT.sh, and URLscan.io, and enables optional output to a specified file. This tool is particularly useful for enhancing reconnaissance efforts in security assessments.