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passive-recon

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Passive intelligence gathering without touching the target — DNS, WHOIS, subdomain enumeration, Certificate Transparency, technology fingerprinting, ASN mapping.

packages/decepticon/decepticon/skills/standard/recon/passive-recon/SKILL.md

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Nov 7, 2026
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# Passive Reconnaissance Knowledge Base

Passive reconnaissance gathers intelligence **without directly interacting with the target's systems**. This leaves no logs, no alerts, and no fingerprints on the target. Always exhaust passive methods before transitioning to active techniques.

## Quick Reference — Copy-Paste Commands
```bash
# Full passive workflow for <TARGET>
whois <TARGET>
dig <TARGET> ANY +noall +answer
subfinder -d <TARGET> -o subdomains.txt
amass enum -passive -d <TARGET> -o amass_subs.txt
curl -s "https://crt.sh/?q=%25.<TARGET>&output=json" | python3 -c "import sys,json; [print(x['name_value']) for x in json.load(sys.stdin)]" | sort -u
httpx -l subdomains.txt -sc -cl -ct -title -tech-detect -o httpx_<TARGET>.txt
curl -sI https://<TARGET>