Detects DNS tunneling and covert-channel data exfiltration by analyzing Zeek dns.log for high-entropy subdomain queries, excessive query volume, abnormally long query lengths, and unusual DNS record types (TXT/NULL/CNAME). Use when hunting for DNS-based data exfiltration or C2 covert channels in network traffic, or when triaging suspicious DNS query volume/patterns surfaced by Zeek logs.
Install
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-dns-tunneling-with-zeeknpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-dns-tunneling-with-zeek -a claude-code -gnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-dns-tunneling-with-zeek -a codex -ggemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/hunting-for-dns-tunneling-with-zeekgh skill install mukul975/Anthropic-Cybersecurity-Skills hunting-for-dns-tunneling-with-zeekgit 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-dns-tunneling-with-zeek ~/.claude/skills/hunting-for-dns-tunneling-with-zeek # Claude Code
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/hunting-for-dns-tunneling-with-zeek ~/.agents/skills/hunting-for-dns-tunneling-with-zeek # Codex, Cursor, Gemini CLI, Copilot, OpenCode