seikaikyo/detecting-golden-ticket-forgery
external/anthropic-cybersecurity-skills/skills/detecting-golden-ticket-forgery/SKILL.md
Detect Kerberos Golden Ticket forgery (e.g. Mimikatz-forged tickets) by analyzing Windows Event ID 4769 for RC4 encryption downgrades (0x17), abnormal ticket lifetimes, and krbtgt account anomalies using Splunk and Elastic SIEM queries. Use when investigating suspected forged Kerberos tickets or krbtgt credential theft in Active Directory.
$ install --global
skillsauthnpx skillsauth add seikaikyo/dash-skills detecting-golden-ticket-forgeryInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Aug 6, 2026, 3:04 AM125.8s3 files scanned
SKILL.md
- name:
- detecting-golden-ticket-forgery
- description:
- Detect Kerberos Golden Ticket forgery (e.g. Mimikatz-forged tickets) by analyzing
- domain:
- cybersecurity
- subdomain:
- threat-detection
- version:
- 1.0
- author:
- mahipal
- license:
- Apache-2.0
Detecting Golden Ticket Forgery
Overview
A Golden Ticket attack (MITRE ATT&CK T1558.001) involves forging a Kerberos Ticket Granting Ticket (TGT) using the krbtgt account NTLM hash, granting unrestricted access to any service in the Active Directory domain. This skill detects Golden Ticket usage by analyzing Event ID 4769 for RC4 encryption type (0x17) in environments enforcing AES, identifying tickets with abnormal lifetimes exceeding domain policy, correlating TGS requests with missing corresponding TGT requests (Event ID 4768), and detecting krbtgt password age anomalies.
When to Use
- When investigating security incidents that require detecting golden ticket forgery
- When building detection rules or threat hunting queries for this domain
- When SOC analysts need structured procedures for this analysis type
- When validating security monitoring coverage for related attack techniques
Prerequisites
- Windows Domain Controller with Kerberos audit logging enabled
- Splunk or Elastic SIEM ingesting Windows Security event logs
- Python 3.8+ for offline event log analysis
- Knowledge of domain Kerberos encryption policy (AES vs RC4)
Steps
- Audit domain Kerberos encryption policy to establish AES-only baseline
- Forward Event IDs 4768 and 4769 to SIEM platform
- Detect RC4 (0x17) encryption in TGS requests where AES is enforced
- Identify TGS requests without corresponding TGT requests (forged ticket indicator)
- Alert on ticket lifetimes exceeding MaxTicketAge domain policy
- Monitor krbtgt account password age and last reset date
- Correlate findings with host/user context for risk scoring
Expected Output
JSON report with Golden Ticket indicators including RC4 downgrades, orphaned TGS requests, abnormal ticket lifetimes, and risk-scored alerts with MITRE ATT&CK technique mapping.
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