Individual skill
hunting-for-spearphishing-indicators
Hunt for spearphishing campaign indicators across email logs, endpoint telemetry, and network data to detect targeted email attacks.
internal/tools/skills/data/threat-hunting/hunting-for-spearphishing-indicators/SKILL.md
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- Observed behavior
- Instructions only
- Last checked
- Nov 9, 2026
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- Repository last updated
- Nov 9, 2026
- License
- Apache-2.0
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- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- threat-hunting Declared skill tag
- mitre-attack Declared skill tag
- spearphishing Declared skill tag
- initial-access Declared skill tag
- email-security Declared skill tag
- t1566 Declared skill tag
- proactive-detection Declared skill tag
- security Derived category
- marketing Derived category
- data Derived category
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SKILL.mdcore · 4,380 bytes
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# Hunting For Spearphishing Indicators
## When to Use
- When proactively hunting for indicators of hunting for spearphishing indicators in the environment
- After threat intelligence indicates active campaigns using these techniques
- During incident response to scope compromise related to these techniques
- When EDR or SIEM alerts trigger on related indicators
- During periodic security assessments and purple team exercises
## Detection Gaps & Validation
- **Delivery variants gateways miss:** HTML smuggling (JS-built blob, nothing inbound to scan), ISO/IMG/VHD containers that strip MOTW, password-protected ZIPs (uninspectable), QR-code phish in PDFs, and OneNote `.one` attachments.
- **Endpoint pivot is the reliable signal:** hunt Office/Outlook spawning children — EID 1 where `ParentImage` is winword/excel/outlook.exe and child is powershell/wscript/mshta/cmd — plus EID 11 writes of `.iso`/`.lnk`/`.hta` to `%TEMP%`/Downloads.