# Awesome Offsec Advanced Recon

> Elite methodology for discovering maximum attack surface with minimal detection (5-Layer Approach).

- Skill: `netvar1337/awesome-offsec-advanced-recon` (Agent Skill)
- Install (CLI): `npx skillmds@latest add netvar1337/awesome-offsec-advanced-recon`
- Raw SKILL.md: https://api.skillmd.com/api/skills/netvar1337/awesome-offsec-advanced-recon/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: GPLv3
- Author: netvar1337 (https://skillmd.com/u/netvar1337)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/netvar1337/awesome-offsec-advanced-recon

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# Advanced Reconnaissance

## Skill Overview

**Prerequisites**: DNS, HTTP, command-line tools  
**Goal**: Discover maximum attack surface with minimal detection

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## Core Philosophy
Breadth → Depth → Exploitation
Wide net → Focus → Attack

**Key Principle**: 80% of bugs come from assets others miss.

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## The 5-Layer Approach
1.  **Layer 1: Organization Intelligence** (scope understanding)
2.  **Layer 2: Passive Subdomain Discovery** (no target contact)
3.  **Layer 3: Active Discovery** (DNS queries, brute-forcing)
4.  **Layer 4: Asset Enumeration** (ports, services, tech stack)
5.  **Layer 5: Deep Content Discovery** (endpoints, parameters)

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## Layer 1: Organization Intelligence

### ASN & IP Range Discovery
- Use `whois` and `amass intel` to find ASNs and IP ranges.
- **Reference**: Use results to feed into `active_discovery` workflows.

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## Layer 2: Passive Subdomain Discovery

### Certificate Transparency & DNS Aggregators
- Tools: `subfinder`, `amass`, `crt.sh`.
- **Goal**: Build a seed list for active resolution.

### Search Engine Dorking
- Google/GitHub dorks to find shadow IT and dev environments.

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## Layer 3: Active Subdomain Discovery

### DNS Brute-Forcing
- Tools: `puredns`, `shuffledns`.
- **Strategy**: Use massive wordlists (Jhaddix/SecLists) + Permutations (`altdns`).

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## Layer 4: Asset Discovery

### Port Scanning & Service Enumeration
- Tools: `naabu`, `nmap`.
- **Output**: `live.txt` (Httpx results)
- **Integration**: Feed live web services to `web_application_security` skills.

### Technology Detection
- Tools: `nuclei -t technologies`, `whatweb`.
- Identify WAFs early (refer to `waf_bypass` skill if blocked).

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## Layer 5: Deep Content Discovery

### Crawling & JavaScript Analysis
- Tools: `katana`, `hakrawler`.
- **Action**: Extract API endpoints from JS files (refer to `javascript_analysis` skill for deobfuscation).

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## Cloud Asset Discovery
- **AWS/Azure/GCP**: Bucket enumeration and cloud-specific pattern scanning.

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## Automation
- Build pipelines using `tmux` or `axiom` for distributed scanning.
- **Continuous Monitoring**: Alert on new subdomains (Cron + Subfinder).

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## Data Organization
Maintain a standardized directory structure (`recon/target/subdomains`, `recon/target/web`, etc.) as defined in the overarching methodology.