OSINT for the Lazy Part 18: Extracting Value from Wayback Machine Archives for Bug Bounty and Security Research
The article examines how OSINT practitioners can leverage web archives for practical security research, particularly in bug bounty programs. Among the many available tools, those that query historical snapshots of websites stand out for their ability to reveal forgotten resources without active scanning.
Common findings from archived copies include old API endpoints, admin and test panels such as /admin, /test, and /debug, configuration and backup files with extensions like .bak, .sql, .old, and .git, as well as JavaScript files containing sensitive parameters or hardcoded keys. Outdated versions of applications may also expose vulnerabilities that have since been patched in the live site.
The primary advantage of this approach is its passive nature: queries are made only against public archives, so the target organization receives no direct requests and detection risk remains minimal.
waybackurls
waybackurls, developed by tomnomnom, is a lightweight Go utility that pulls every indexed URL for a given domain from the Wayback Machine CDX API. It supports subdomains and reveals parameters that can later be tested for issues such as IDOR, open redirect, LFI, and XSS. Installation requires Go and is performed with a single command: go install github.com/tomnomnom/waybackurls@latest.
gau (getallurls)
gau, created by lc, extends coverage by querying four sources simultaneously: Wayback Machine, Common Crawl, AlienVault OTX, and URLScan. It accepts domains via stdin or arguments, supports multiple targets, and offers rich filtering flags including --blacklist, --fc, --mc, --from, --to, and --providers. Installation command: go install github.com/lc/gau/v2/cmd/gau@latest.
waymore
For users preferring Python, waymore by xnl_h4ck3r provides the widest coverage and the ability to download full archived responses. It supports additional sources including VirusTotal, GhostArchive, and Intelligence X. While slower than the Go tools, it excels at retrieving content that can be further analyzed with tools such as xnLinkFinder or trufflehog for secrets and additional links.
Security researchers are encouraged to combine these utilities according to their needs: waybackurls or gau for quick results and waymore when maximum coverage and archived content analysis are required. All discovered URLs must only be tested on assets within authorized scope.
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