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ctf-osint

ctf-osint

github.com/wgpsecSecurity1.8k51 installsUpdated 5d ago
Repository

About ctf-osint

ctf-osint is a reference skill for CTF open-source intelligence tasks. It helps participants choose an investigation path from clues and provides common methods and commands.

Key features

  1. 01Classifies OSINT tasks by clue
  2. 02Username and social media investigation
  3. 03Geolocation and media analysis
  4. 04Web and DNS reconnaissance
  5. 05Reference for tools and commands

Use cases

  1. 01Trace usernames and social accounts
  2. 02Infer locations from image clues
  3. 03Inspect domains and archived pages

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/wgpsec/aboutsecurity --skill ctf-osint

After installing, type/ctf-osintin Claude Code to confirm it loaded.

Bundled files

References and scripts installed along with SKILL.md.

evals/
evals.json
recall.json
references/
geolocation-and-media.md
social-media.md
web-and-dns.md

Details

From the project README

CTF 开源情报 (OSINT)

深入参考

以下参考资料按需加载,根据识别出的具体方向选择对应文件:


分类决策树

OSINT 题目?
├─ 找人/找账号
│  ├─ 用户名 → whatsmyname.app / namechk.com (741+ 站点)
│  ├─ Twitter/X → 数字 User ID 持久追踪 / Snowflake 时间戳
│  ├─ Tumblr → curl -sI 检查 x-tumblr-user / avatar/512
│  └─ BlueSky → public.api.bsky.app (无需认证)
├─ 找位置(地理定位)
│  ├─ 图片 → Google Lens 裁剪搜索 / Yandex(人脸) / TinEye
│  ├─ 路标/铁路 → OpenRailwayMap / OpenInfraMap
│  ├─ MGRS 坐标 → 在线转换器 → Google Maps
│  ├─ Plus Codes → `XXXX+XXX` 格式 → Google Maps
│  └─ 街景匹配 → 特征提取 + 多指标相似度排序
├─ 找信息
│  ├─ DNS → dig TXT/CNAME/MX / zone transfer
│  ├─ Google Dorking → site: filetype: intitle:
│  ├─ Wayback Machine → 历史快照
│  ├─ WHOIS → 反向WHOIS / 历史WHOIS / IP/ASN
│  └─ GitHub → issue/PR/commit/wiki 分析
└─ 特殊场景
   ├─ Tor 中继 → metrics.torproject.org 指纹查询
   ├─ FEC 政治捐款 → FEC.gov
   └─ Unicode 同形字隐写 → ASCII=0, 同形字=1

快速命令

# 元数据提取
exiftool image.jpg
pdfinfo document.pdf

# DNS 侦察
dig -t txt domain.com
dig axfr @ns.domain.com domain.com

# IP 地理定位
curl "http://ip-api.com/json/IP_ADDR"

# Google Dorking
# site:example.com filetype:pdf
# intitle:"index of" password

# Flag 搜索
grep -rniE '(flag|ctf)\{' .

字符串识别

格式类型
40 hex charsSHA-1(Tor 指纹)
64 hex charsSHA-256
32 hex charsMD5

常用工具

工具用途
Shodan联网设备搜索
Censys证书和主机搜索
VirusTotal文件/URL 信誉
Wayback Machine历史网页快照
whatsmyname.app用户名跨平台枚举
Google Lens裁剪区域反向图搜

Google Dorking

  • 检查 robots.txt、sitemap、.git 等信息泄露源

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