Individual skill
detecting-ntlm-relay-with-event-correlation
Detect NTLM relay attacks through Windows Security Event correlation by analyzing Event 4624 LogonType 3 for IP-to-hostname mismatches, identifying Responder/LLMNR poisoning artifacts, auditing SMB and LDAP signing enforcement across the domain, and detecting NTLM downgrade attacks from NTLMv2 to NTLMv1 using event log analysis.
internal/tools/skills/data/threat-hunting/detecting-ntlm-relay-with-event-correlation/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
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- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
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- Repository stars (not skill ratings)
- 1,313
- Repository last updated
- Nov 8, 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
- ntlm-relay Declared skill tag
- event-correlation Declared skill tag
- t1557.001 Declared skill tag
- event-4624 Declared skill tag
- responder Declared skill tag
- smb-signing Declared skill tag
- ldap-signing Declared skill tag
- ntlm-downgrade Declared skill tag
- petitpotam Declared skill tag
- active-directory Declared skill tag
- security Derived category
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# Detecting NTLM Relay with Event Correlation
> **Authorized Testing Disclaimer**: The offensive techniques and attack simulations described in this skill are intended exclusively for authorized penetration testing, red team engagements, purple team exercises, and security research conducted with explicit written permission from the system owner. Unauthorized use of these techniques against systems you do not own or have permission to test is illegal and unethical. Always operate within the scope of your engagement and comply with applicable laws and regulations.
## Overview
NTLM relay attacks intercept NTLM authentication messages and forward them to a target service to gain unauthorized access. Attackers use tools like Responder for LLMNR/NBT-NS/mDNS poisoning, ntlmrelayx (Fox-IT/Impacket) for multi-protocol relay, and coercion techniques like PetitPotam (MS-EFSRPC) and DFSCoerce to force authentication from high-value targets like domain controllers. This skill provides a comprehensive event correlation framework using Windows Security Event 4624 LogonType 3 analysis, IP-to-hostname mismatch detection, Responder traffic identification, SMB/LDAP signing audit, and NTLM downgrade detection to identify relay attacks across Active Directory environments.
## When to Use
- Hunting for credential relay activity in Active Directory environments where NTLM authentication is still in use
- Investigating alerts for authentication anomalies where the source IP does not match the expected workstation
- Auditing SMB signing and LDAP signing enforcement to assess exposure to relay attacks
- Detecting NTLM downgrade attacks where NTLMv2 is forced to NTLMv1 for easier offline cracking or relay