Attack Surface Recon

Build a complete external attack-surface picture from public sources.

1. Root Domain Discovery

• Start from known brands/domains; expand via certificate transparency (crt.sh), ASN lookups, WHOIS reverse lookups, acquisition history
• Identify cloud ranges: enumerate owned netblocks (bgp.he.net, ipinfo)

2. Subdomain Enumeration

• Passive sources: CT logs, DNS datasets (SecurityTrails-style), web archives
• Active: DNS bruteforce, permutation generation (alterations of known hosts: -dev, -staging, -old)
• Resolve; probe HTTP(S) for live services; fingerprint technologies (httpx/wappalyzer)

3. Exposed Services

• Port scan in-scope IPs (top ports minimum, full range on high-value hosts)
• Flag: exposed admin panels, databases (3306/5432/27017), RDP/SMB, Redis/Memcached, Kubernetes API, VPN portals, file shares
• Takeover checks: dangling CNAMEs pointing at deprecated cloud services

4. Credential and Code Leaks

• Breach data for corporate domains (report presence; never view more than proof)
• Public code search (GitHub/gists) for org domains, tokens, internal hostnames in commits
• Exposed storage: open S3 buckets/azure blobs matching org naming patterns

5. People and Brand

• Employee enumeration via LinkedIn for phishing-simulation scoping (policy permitting)
• Lookalike domains registered recently (typosquats), abuse of brand in app stores

Rules

• Passive sources preferred; active scanning only within authorization
• Found leaked credentials: report immediately, do not log in with them

Output

Ranked asset inventory: exposed services by risk, credential leak notifications, takeover-prone records, and monitoring recommendations.