Individual skill

recon-subdomain-enum

Enumerate subdomains and live hosts to build the attack surface for a bug-bounty program or external assessment. Load at engagement start, on "recon", a root domain in scope, "find subdomains", or before content discovery. Signals: wildcard scope (*.target.com), a program scope list, a new external target.

skills/recon/recon-subdomain-enum/SKILL.md

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Observed behavior: Instructions only
Last checked: Nov 11, 2026

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Repository stars (not skill ratings): 27
Repository last updated: Oct 14, 2026
License: MIT

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

agent-skills Repository topic
ai-agents Repository topic
ai-security Repository topic
application-security Repository topic
blue-team Repository topic
bug-bounty Repository topic
claude-code Repository topic
codex Repository topic
detection-engineering Repository topic
gemini Repository topic
writing Derived category

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SKILL.mdcore · 2,321 bytes

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# Subdomain & live-host enumeration

## When it applies
External, in-scope, wildcard programs where surface = subdomains. Do this before hunting;
most bugs live on forgotten hosts (staging, dev, legacy, acquisitions).

## Why it works
Organizations sprint faster than they inventory. Passive sources (CT logs, DNS aggregators)
plus permutation/brute-force surface hosts nobody remembers — and those skip the hardening
the flagship app got.

## Method
1. **Passive** (fast, quiet): `subfinder -d target.com -all -silent` and `amass enum -passive
   -d target.com`. Pulls CT logs, PassiveDNS, search engines — no packets to the target.