Detect NTLM relay attacks (T1557.001) by correlating Windows Event 4624 LogonType 3 for IP-to-hostname mismatches, identifying Responder/LLMNR poisoning artifacts, auditing SMB/LDAP signing, and flagging NTLMv2-to-NTLMv1 downgrades.
Install
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-ntlm-relay-with-event-correlationnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-ntlm-relay-with-event-correlation -a claude-code -gnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-ntlm-relay-with-event-correlation -a codex -ggemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/detecting-ntlm-relay-with-event-correlationgh skill install mukul975/Anthropic-Cybersecurity-Skills detecting-ntlm-relay-with-event-correlationgit clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills /tmp/mukul975__Anthropic-Cybersecurity-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/detecting-ntlm-relay-with-event-correlation ~/.claude/skills/detecting-ntlm-relay-with-event-correlation # Claude Code
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/detecting-ntlm-relay-with-event-correlation ~/.agents/skills/detecting-ntlm-relay-with-event-correlation # Codex, Cursor, Gemini CLI, Copilot, OpenCode