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mukul975
cb8d79e068
- Add validated mitre_attack frontmatter to all 754 skills (286 distinct techniques), verified against MITRE ATT&CK v19.1 via the official mitreattack-python library: 0 revoked, deprecated, or invalid IDs - Curate precise per-skill technique IDs for forensics, malware-analysis, threat-intel, and red-team skills (e.g. DCSync -> T1003.006, Kerberoasting -> T1558.003, Pass-the-Ticket -> T1550.003) - Reconcile v19.1 tactic restructuring: Defense Evasion split into Stealth (TA0005) and Defense Impairment (TA0112); revoked T1562.* family and T1070.001/.002 remapped to active equivalents (T1685.*) - Normalize word-split tags across 35 skills (remove filename-derived stopword tags, add semantic cybersecurity tags) - Add api-reference.md for 3 skills that were missing it - Update README ATT&CK section with accurate v19.1 tactic distribution
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2.7 KiB
name, description, domain, subdomain, tags, version, author, license, d3fend_techniques, nist_csf, mitre_attack
| name | description | domain | subdomain | tags | version | author | license | d3fend_techniques | nist_csf | mitre_attack | |||||||||||||||||||||||
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| hunting-for-ntlm-relay-attacks | Detect NTLM relay attacks by analyzing Windows Event 4624 logon type 3 with NTLMSSP authentication, identifying IP-to-hostname mismatches, Responder traffic signatures, SMB signing status, and suspicious authentication patterns across the domain. | cybersecurity | threat-hunting |
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1.0 | mahipal | Apache-2.0 |
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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
Prerequisites
- Python 3.9+ with Windows Event Log access or exported logs
- Windows Security audit logging enabled (Event ID 4624, 4625, 5145)
- Network access for SMB signing status checks
Key Detection Areas
- IP-hostname mismatch — WorkstationName in Event 4624 does not resolve to the source IpAddress
- NTLMSSP authentication — logon events using NTLM instead of Kerberos from domain-joined hosts
- Machine account relay — computer accounts (ending in $) authenticating from unexpected IPs
- Rapid authentication — single account authenticating to multiple hosts within seconds
- Named pipe access — Event 5145 showing access to Spoolss, lsarpc, netlogon, samr pipes
- SMB signing disabled — hosts not enforcing SMB signing, enabling relay attacks
Output
JSON report with suspected relay events, IP-hostname correlation anomalies, SMB signing audit results, and MITRE ATT&CK mapping to T1557.001.