Detect data-staging activity (MITRE ATT&CK T1074) by analyzing EDR/Sysmon process-creation and file-system telemetry (Event ID 4688, Sysmon 1/11) for 7-Zip/RAR/tar archive creation, unusual temp or hidden folder access, and anomalous consolidation of files from multiple directories.
Install
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-data-staging-before-exfiltrationnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-data-staging-before-exfiltration -a claude-code -gnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill hunting-for-data-staging-before-exfiltration -a codex -ggemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/hunting-for-data-staging-before-exfiltrationgh skill install mukul975/Anthropic-Cybersecurity-Skills hunting-for-data-staging-before-exfiltrationgit 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-data-staging-before-exfiltration ~/.claude/skills/hunting-for-data-staging-before-exfiltration # Claude Code
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/hunting-for-data-staging-before-exfiltration ~/.agents/skills/hunting-for-data-staging-before-exfiltration # Codex, Cursor, Gemini CLI, Copilot, OpenCode