Individual skill
detecting-kerberoasting-attacks
Detect Kerberoasting attacks by monitoring for anomalous Kerberos TGS requests targeting service accounts with SPNs for offline password cracking.
internal/tools/skills/data/threat-hunting/detecting-kerberoasting-attacks/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
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- Yes
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- Skill scan complete
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- Observed behavior
- Instructions only
- Last checked
- Nov 9, 2026
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- Repository stars (not skill ratings)
- 1,329
- Repository last updated
- Nov 9, 2026
- License
- Apache-2.0
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- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- threat-hunting Declared skill tag
- mitre-attack Declared skill tag
- kerberoasting Declared skill tag
- credential-access Declared skill tag
- kerberos Declared skill tag
- t1558 Declared skill tag
- proactive-detection Declared skill tag
- security Derived category
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SKILL.mdcore · 4,804 bytes
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# Detecting Kerberoasting Attacks
## When to Use
- When proactively hunting for indicators of detecting kerberoasting attacks in the environment
- After threat intelligence indicates active campaigns using these techniques
- During incident response to scope compromise related to these techniques
- When EDR or SIEM alerts trigger on related indicators
- During periodic security assessments and purple team exercises
## Detection Gaps & Validation
- **AES roasting evades RC4-only rules.** The classic signal is 4769 with `TicketEncryptionType=0x17` (RC4) and `TicketOptions=0x40810000`, but modern Rubeus supports `/aes` to request AES (0x12/0x11) tickets that bypass any RC4-only detection. Also alert when an account that normally authenticates with AES suddenly requests RC4.
- **Audit subcategory must be on.** No 4769 is produced unless "Audit Kerberos Service Ticket Operations" is enabled on DCs — verify with `auditpol /get /subcategory:"Kerberos Service Ticket Operations"`.