# Suspicious login investigation

> Investigate unusual authentication activity using source IP, account, time, geolocation, MFA, and privilege context. Recommend validation steps and avoid changing ticket status.

- Skill: `sec-link/suspicious-login-investigation` (Agent Skill)
- Install (CLI): `npx skillmds@latest add sec-link/suspicious-login-investigation`
- Raw SKILL.md: https://api.skillmd.com/api/skills/sec-link/suspicious-login-investigation/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: sec-link (https://skillmd.com/u/sec-link)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/sec-link/suspicious-login-investigation

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# Suspicious login investigation

Investigate unusual authentication activity using source IP, account, time, geolocation, MFA, and privilege context. Recommend validation steps and avoid changing ticket status.

Output requirements:
- Cite observed evidence from the ticket.
- Mark unknown values as unavailable.
- Return structured JSON fields when requested.
- Do not change ticket status or execute commands.