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yaklang/subdomain-takeover

서브도메인 탈취 탐지 및 익스플로잇 플레이북. 대상이 해제된 클라우드 리소스, 만료된 타사 서비스, 또는 공격자가 피해자 도메인 아래에서 콘텐츠를 제공하기 위해 등록할 수 있는 미청구 SaaS 테넌트를 가리키는 방치된 CNAME/NS/MX 레코드를 가지고 있을 때 사용합니다.

subdomain-takeover란 무엇인가요?

이 스킬은 서브도메인 탈취 취약점을 탐지하고 익스플로잇하기 위한 종합적인 플레이북입니다. 대상 도메인에 해제된 클라우드 리소스(예: AWS S3, Azure, GCP), 만료된 타사 서비스, 또는 공격자가 등록할 수 있는 미청구 SaaS 테넌트를 가리키는 방치된 CNAME, NS, MX 레코드가 있을 때 유용합니다. 이 스킬은 DNS 레코드를 분석하여 잠재적 취약점을 식별하고, 탈취 가능한 리소스를 찾기 위한 능동적 스캔을 수행하며, 실제 서브도메인 제어 권한을 획득하는 익스플로잇 절차를 안내합니다. 보안 연구원, 침투 테스터, 버그 바운티 헌터를 위해 설계되었으며, DNS 확인, HTTP 요청, 클라우드 서비스 프로비저닝 체크 등 다양한 방법을 통해 취약점을 검증합니다.

지원 대상~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/yaklang/hack-skills/tree/main/skills/subdomain-takeover

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문서

subdomain-takeover은(는) 무엇을 하나요?

서브도메인 탈취 탐지 및 익스플로잇 플레이북. 대상이 해제된 클라우드 리소스, 만료된 타사 서비스, 또는 공격자가 피해자 도메인 아래에서 콘텐츠를 제공하기 위해 등록할 수 있는 미청구 SaaS 테넌트를 가리키는 방치된 CNAME/NS/MX 레코드를 가지고 있을 때 사용합니다.

개요

이 플레이북은 다음 단계를 수행합니다:

  1. 탐지 - 대상 도메인의 DNS 레코드(CNAME, NS, MX)를 확인하고 해제된 리소스 또는 타사 서비스를 가리키는 레코드를 식별합니다.
  2. 검증 - 식별된 레코드가 실제로 탈취 가능한지 확인하기 위해 HTTP 요청, DNS 확인, 클라우드 서비스 프로비저닝 상태 체크를 수행합니다.
  3. 익스플로잇 - 가능한 경우, 서브도메인을 등록하거나 제어할 수 있는 방법을 시연합니다.

사용법

# 대상 도메인 스캔
yak subdomain-takeover scan --target example.com

# 특정 서브도메인 확인
yak subdomain-takeover check --subdomain test.example.com

# 전체 익스플로잇 실행
yak subdomain-takeover exploit --target example.com --auto

지원 서비스

이 플레이북은 다음 서비스를 지원합니다:

  • AWS (S3, CloudFront, Elastic Beanstalk)
  • Azure (App Service, Traffic Manager, CDN)
  • Google Cloud (Cloud Storage, App Engine, Cloud Run)
  • GitHub Pages
  • Heroku
  • Shopify
  • Squarespace
  • Tumblr
  • Wordpress.com
  • 기타 여러 SaaS 제공업체

탐지 방법

플레이북은 다음과 같은 기술을 사용합니다:

  • DNS 레코드 확인 및 분석
  • HTTP 응답 코드 및 본문 분석
  • 클라우드 제공업체 API 쿼리
  • 타사 서비스 등록 상태 확인

참고 사항

  • 이 플레이북은 합법적인 보안 테스트 목적으로만 사용하십시오.
  • 권한 없이 타사 시스템에 접근하는 것은 불법일 수 있습니다.
  • 발견된 취약점은 적절한 당국에 보고해야 합니다.

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

yaklang/401-403-bypass-techniques

401/403 bypass playbook. Use when encountering access-denied responses on admin panels, API endpoints, or restricted paths. Covers path manipulation, HTTP method tampering, header injection, protocol downgrade, and automated bypass tools.

yaklang/active-directory-acl-abuse

Active Directory ACL abuse playbook. Use when exploiting misconfigured AD permissions including GenericAll, WriteDACL, DCSync rights, shadow credentials, LAPS reading, GPO abuse, and BloodHound-guided attack paths.

yaklang/active-directory-certificate-services

AD Certificate Services attack playbook. Use when targeting misconfigured AD CS for privilege escalation via ESC1-ESC13 template abuse, NTLM relay to enrollment, CA officer abuse, and certificate-based persistence.

yaklang/active-directory-kerberos-attacks

Kerberos attack playbook for Active Directory. Use when targeting AD authentication via AS-REP roasting, Kerberoasting, golden/silver/diamond tickets, delegation abuse, or pass-the-ticket attacks.

yaklang/ai-ml-security

AI/ML security playbook. Use when assessing model supply chain attacks (pickle RCE, poisoned weights), adversarial examples, model poisoning, model stealing, data privacy attacks (membership inference, model inversion), and autonomous agent security risks.

yaklang/android-pentesting-tricks

Android pentesting playbook. Use when testing Android applications for SSL pinning bypass, exported component abuse, WebView vulnerabilities, intent redirection, root detection bypass, tapjacking, and backup extraction during authorized mobile security assessments.

yaklang/anti-debugging-techniques

Anti-debugging detection and bypass playbook. Use when reversing protected binaries that detect debuggers via ptrace, PEB flags, timing checks, or signal/exception handlers on Linux and Windows.

yaklang/api-auth-and-jwt-abuse

API authentication and JWT abuse playbook. Use when testing bearer tokens, API keys, claim trust, header spoofing, rate limits, and API auth boundary weaknesses.

yaklang/api-authorization-and-bola

API authorization and BOLA testing playbook. Use when APIs expose object identifiers, nested resources, hidden writable fields, or weak function-level authorization.

yaklang/api-recon-and-docs

API reconnaissance and documentation review playbook. Use when discovering endpoints, schemas, versions, OpenAPI specs, hidden docs, and surface area for API testing.

yaklang/api-sec

Entry P1 category router for API security. Use when choosing between API recon, authorization, token abuse, and hidden-parameter workflows before any deeper API topic skill.

yaklang/arbitrary-write-to-rce

Arbitrary write to RCE playbook. Use when you have an arbitrary write primitive (from heap exploitation, format string, or OOB write) and need to convert it into code execution by targeting GOT, hooks, _IO_FILE vtable, exit_funcs, TLS_dtor_list, modprobe_path, .fini_array, or C++ vtables.

yaklang/authbypass-authentication-flaws

Authentication bypass testing playbook. Use when assessing login flows, password reset logic, account recovery, MFA bypass, token predictability, brute-force resistance, and session boundary flaws.

yaklang/auth-sec

Entry P1 category router for authentication and authorization. Use when testing login flows, sessions, object authorization, JWT, OAuth, CORS, CSRF, and enterprise SSO weaknesses before any deeper auth topic skill.

yaklang/binary-protection-bypass

Binary protection bypass playbook. Use when identifying and bypassing ASLR, PIE, NX/DEP, stack canary, RELRO, FORTIFY_SOURCE, CET, and MTE protections in ELF binaries to enable exploitation.

yaklang/browser-exploitation-v8

Browser and V8 exploitation playbook. Use when exploiting JavaScript engine vulnerabilities including JIT type confusion, incorrect bounds elimination, and V8 sandbox bypass to achieve renderer RCE and sandbox escape in Chrome/Chromium.

yaklang/business-logic-vuln

Entry P1 category router for business logic testing. Use when workflow abuse, race conditions, pricing flaws, or multi-step state attacks matter more than parser-level input injection.

yaklang/business-logic-vulnerabilities

Business logic vulnerability playbook. Use when reasoning about workflows, race conditions, price manipulation, coupon abuse, state machines, and multi-step authorization gaps.

yaklang/classical-cipher-analysis

Classical cipher analysis playbook. Use when encountering substitution ciphers, Vigenere, transposition, XOR, or encoded text in CTF challenges that requires frequency analysis, Kasiski examination, or known-plaintext cryptanalysis.

yaklang/clickjacking

Clickjacking playbook. Use when testing whether target pages can be framed, whether X-Frame-Options or CSP frame-ancestors are properly configured, and whether UI redress attacks can trigger sensitive actions.

관련 스킬

steipete/notion

Notion CLI/API for pages, Markdown content, data sources, files, comments, search, Workers, and raw API calls.

community

langchain-ai/langchain

The agent engineering platform.

community

bytedance/podcast-generation

Use this skill when the user requests to generate, create, or produce podcasts from text content. Converts written content into a two-host conversational podcast audio format with natural dialogue.

community

composiohq/twitter-algorithm-optimizer

Analyze and optimize tweets for maximum reach using Twitter's open-source algorithm insights. Rewrite and edit user tweets to improve engagement and visibility based on how the recommendation system ranks content.

community

composiohq/competitive-ads-extractor

Extracts and analyzes competitors' ads from ad libraries (Facebook, LinkedIn, etc.) to understand what messaging, problems, and creative approaches are working. Helps inspire and improve your own ad campaigns.

community

upstash/context7

Context7 Platform -- Up-to-date code documentation for LLMs and AI code editors

community
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