Skip to content
cccskills
FreePublished on GitHub

competition-kerberos-delegation

Investigate Kerberos delegation, which lets services act on another identity, in a CTF sandbox. Trace delegation settings, issued tickets, and service acceptance to document a reproducible trust path and the privileges it actually grants.

OriginalShow the original description

Internal downstream skill for ctf-sandbox-orchestrator. CTF-sandbox workflow for Kerberos delegation, SPN trust edges, S4U abuse, RBCD, constrained or unconstrained delegation, and service-ticket acceptance. Use when the user asks about constrained delegation, unconstrained delegation, RBCD, S4U, SPNs, ticket acceptance, or how a Kerberos trust edge turns into effective privilege under sandbox assumptions. Use only after `$ctf-sandbox-orchestrator` has already established sandbox assumptions and routed here.

See how to install

Good for

  • Identifying constrained, unconstrained, or resource-based delegation
  • Tracing S4U steps and issued authentication tickets
  • Verifying ticket acceptance and resulting privileges
  • Documenting delegation paths with service-side evidence

Files included (3)

  • SKILL.md2.8 KB
  • agents/openai.yaml363 B
  • references/kerberos-delegation.md792 B

SKILL.md (original)

Review the instructions the agent will receive before you install.

Competition Kerberos Delegation

Use this skill only as a downstream specialization after $ctf-sandbox-orchestrator is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to $ctf-sandbox-orchestrator first.

Use this skill when the hard part is not "is there Kerberos here," but which delegation edge exists, which ticket is being minted, and which service really accepts it.

Reply in Simplified Chinese unless the user explicitly requests English.

Quick Start

  1. Write the trust chain first: principal -> delegation edge -> ticket type -> target SPN -> accepting service -> resulting privilege.
  2. Separate ticket possession from accepted privilege.
  3. Keep SPNs, delegation mode, PAC/group data, encryption type, and service acceptance in one compact evidence block.
  4. Reproduce one minimal delegation chain before broadening into variants.
  5. Tie every privilege claim to a specific accepted ticket or service-side effect.

Workflow

1. Identify The Delegation Edge

  • Determine whether the path is constrained delegation, unconstrained delegation, resource-based constrained delegation, protocol transition, or another trust edge.
  • Inspect SPNs, ACLs, service accounts, SIDHistory, certificate templates, and replication rights only when they affect the active path.

2. Trace Ticket Minting And Acceptance

  • Record TGT/TGS type, S4U steps when relevant, delegation flags, PAC or group data, encryption type, cache location, and target SPN.
  • Prove which service actually accepts the ticket and what capability appears after acceptance.

3. Report The Effective Edge

  • Compress the chain into one replayable path, not a vague "domain compromise" statement.
  • Separate candidate edges from the edge that really lands privilege.

Read This Reference

  • Load references/kerberos-delegation.md for the delegation checklist, ticket fields to preserve, and common proof mistakes.

What To Preserve

  • SPN, ticket type, delegation mode, PAC/group data, encryption type, cache location, accepting service
  • Service-side logs, event IDs, logon session changes, or group changes proving effective privilege
  • The exact trust edge that makes the ticket replayable

Reviews

No reviews yet. Tell others what you thought.

Comments

No login needed. Share how it worked for you, ask a question, or note where it did not run.

No comments yet. Be the first to write one.

Comments are published right away. Do not include personal information such as email addresses or phone numbers. Up to 2 URLs.

0 / 1,000 characters

This form is protected by reCAPTCHA, and the Google Privacy Policy and Terms of Service apply.

More skills from this repository

api-security

FreeSummary

Assess authorized APIs through a ten-stage workflow covering endpoint discovery, authentication, access permissions, input handling, and request limits. Collect reproducible evidence and turn findings into regression checks that can run in a development pipeline.

  • Review API authentication and access permissions
  • Assess GraphQL and WebSocket security
  • Check request limits and unintended data exposure
zhaoxuya520/reverse-skill42.6KUpdated Sep 22, 2026

apk-reverse

FreeSummary

Inspect Android APKs from the command line to understand app logic, permissions, and components. Supports Java decompilation, low-level code edits, rebuilding and signing, plus Frida observation of running methods and routing to native code analysis.

  • Inspecting APK entry points, components, and permissions
  • Locating login, signing, and certificate checks
  • Editing smali code and rebuilding an APK
zhaoxuya520/reverse-skill42.6KUpdated Sep 22, 2026

attack-chain

FreeSummary

Plan and coordinate authorized penetration tests across multiple stages, from reconnaissance to access, privilege escalation, movement between systems, and impact assessment. Assign specialist skills, revise blocked paths, and maintain evidence and progress records for the final report.

  • Plan a penetration test across multiple stages
  • Assess how far a vulnerability could lead
  • Replan from existing credentials or system access
zhaoxuya520/reverse-skill42.6KUpdated Sep 22, 2026

binary-diff

FreeSummary

Transfer known function and variable names from an older binary to a newer version. Compare disassembly and pseudocode with an LLM, produce structured mappings, and apply names and comments in IDA.

  • Migrate known function names after a software update
  • Locate kernel functions when the new PDB is unavailable
  • Find updated function addresses and structure offsets
zhaoxuya520/reverse-skill42.6KUpdated Sep 22, 2026

Inspect compiled programs in Binary Ninja using strings, function references, and intermediate representations—views of program logic at different levels. Trace data flow and report findings with addresses, supporting evidence, confidence, and reproduction steps.

  • Tracing function calls and data flow in Binary Ninja
  • Cross-checking findings from other disassemblers
  • Automating binary analysis with the Python API
zhaoxuya520/reverse-skill42.6KUpdated Sep 22, 2026

Automate website navigation, form filling, content collection, and Windows desktop interactions. The skill selects browser or desktop tools for the task and guides screenshot capture and desktop network traffic observation when needed.

  • Automating website login and form entry
  • Collecting page content and screenshots
  • Operating Windows desktop applications
zhaoxuya520/reverse-skill42.6KUpdated Sep 22, 2026

See all skills by zhaoxuya520

Report a problem with this skill