Individual skill
hunting-for-ntlm-relay-attacks
Detects NTLM relay attacks (MITRE T1557.001) by analyzing Windows Event ID 4624 logon type 3 with NTLMSSP authentication, flagging IP-to-hostname mismatches, Responder/LLMNR poisoning signatures, SMB signing status, and anomalous cross-domain authentication patterns. Use when investigating credential-relay activity in Active Directory or building detections for NTLM relay and coercion-based attacks.
skills/hunting-for-ntlm-relay-attacks/SKILL.md
Source commit 54a798831d2266a3ca61ce68a7acb80b81160d57
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- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
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Repository context
- Repository stars (not skill ratings)
- 35,887
- Repository last updated
- Aug 31, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- ntlm-relay Declared skill tag
- windows-events Declared skill tag
- event-4624 Declared skill tag
- ntlmssp Declared skill tag
- responder Declared skill tag
- smb-signing Declared skill tag
- credential-access Declared skill tag
- t1557.001 Declared skill tag
- active-directory Declared skill tag
- security Derived category
Files and excerpt
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LICENSEasset · 11,255 bytesSKILL.mdcore · 2,881 bytesSKILL.mdcore · 2,881 bytesSKILL.mdcore · 2,881 bytesreferences/api-reference.mddoc · 4,305 bytesscripts/agent.pyruns · 13,018 bytes
Read excerpt
# Hunting for NTLM Relay Attacks
## Overview
NTLM relay attacks intercept and forward NTLM authentication messages to gain unauthorized access to network resources. Attackers use tools like Responder for LLMNR/NBT-NS poisoning and ntlmrelayx for credential relay. This skill detects relay activity by querying Windows Security Event 4624 (successful logon) for type 3 network logons with NTLMSSP authentication, identifying mismatches between WorkstationName and source IpAddress, detecting rapid multi-host authentication from single accounts, and auditing SMB signing configuration across domain hosts.
## When to Use
- When investigating security incidents that require hunting for ntlm relay attacks
- 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
