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.
Install
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-ntlm-relay-attacksnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-ntlm-relay-attacks -a claude-code -gnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-ntlm-relay-attacks -a codex -ggemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/hunting-for-ntlm-relay-attacksgh skill install mukul975/Anthropic-Cybersecurity-Skills hunting-for-ntlm-relay-attacksgit 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/hunting-for-ntlm-relay-attacks ~/.claude/skills/hunting-for-ntlm-relay-attacks # Claude Code
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/hunting-for-ntlm-relay-attacks ~/.agents/skills/hunting-for-ntlm-relay-attacks # Codex, Cursor, Gemini CLI, Copilot, OpenCode