triage-suspicious-login

triage-suspicious-login is a skill for Claude Code, Codex from dandye/ai-runbooks. It costs 50 tokens per session (1,022 once invoked), scanned A, original, Apache-2.0.

A guide for investigating alerts about unusual account sign-ins, such as a login from an unexpected location or many failed attempts. A security operations center (SOC) is a team that monitors and investigates these events.

In plain words
What is it for?
Use it to examine suspicious-login cases, identify the account, source IP, and hostname involved, review recent activity, and enrich the IP address with reputation and geolocation information.
Why use it?
It organizes the early investigation by gathering case details, account history, login activity, IP-address reputation, location, and related alerts, then deciding whether the case needs escalation.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to examine suspicious-login cases, identify the account, source IP, and hostname involved, review recent activity, and enrich the IP address with reputation and geolocation information.

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Install with agentmods
npx agentmods add skills/dandye/ai-runbooks/triage-suspicious-login
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add dandye/ai-runbooks --skill triage-suspicious-login
Clone the repo
git clone --depth 1 https://github.com/dandye/ai-runbooks

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for triage-suspicious-login

README.md
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Your own site
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Your own site · 80×15
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Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,022 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00050 $0.01022
Opus 5 $0.00025 $0.00511
Sonnet 5 $0.00010 $0.00204
Haiku 4.5 $0.00005 $0.00102

Measured 13d ago against content hash bd45371b70d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

triage-suspicious-login scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/triage-suspicious-login/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Suspicious Login Triage Skill

Guide initial triage of suspicious login alerts (impossible travel, untrusted location, multiple failed logins) for Tier 1 SOC Analysts.

Inputs

  • CASE_ID - SOAR case ID containing the alert(s)
  • ALERT_GROUP_IDENTIFIERS - Alert group identifiers from the case
  • (Optional) USER_ID - The user ID if known upfront
  • (Optional) SOURCE_IP - The source IP if known upfront

Workflow

Step 1: Get Case Context

secops-soar.get_case_full_details(case_id=CASE_ID)

Step 2: Extract Key Entities

secops-soar.list_events_by_alert(case_id=CASE_ID, alert_id=ALERT_ID)

Parse events to extract:

  • USER_ID - The user account
  • SOURCE_IP - The login source IP
  • HOSTNAME - The target/source hostname (if available)

Step 3: User Context (SIEM)

secops-mcp.lookup_entity(entity_value=USER_ID)

Record: Recent activity, first/last seen, related alerts.

Step 4: Source IP Enrichment

Use /enrich-ioc with IOC_TYPE="IP Address":

  • GTI reputation and geolocation
  • SIEM entity summary
  • IOC match status

Step 5: Hostname Context (if available)

secops-mcp.lookup_entity(entity_value=HOSTNAME)

Step 6: Recent Login Activity

Search for login patterns over the last 96 hours:

secops-mcp.search_security_events(
    text='metadata.event_type IN ("USER_LOGIN", "AUTH_ATTEMPT") AND principal.user.userid = "USER_ID"',
    hours_back=96
)

Analyze for:

  • Logins from unusual IPs
  • Successful logins after failures
  • Geographic anomalies (impossible travel)
  • Concurrent sessions from different locations

Step 7: Check Related Cases

Use /find-relevant-case with search terms: [USER_ID, SOURCE_IP, HOSTNAME]

Step 8: (Optional) Identity Provider Check

If IDP tools available (e.g., Okta):

  • Account status
  • MFA enrollment
  • Recent legitimate logins
  • Password change history

Step 9: Synthesize & Document

Use /document-in-case with findings summary:

Suspicious Login Triage for USER_ID from SOURCE_IP:
- User SIEM Summary: [...]
- Source IP GTI: [reputation, geo]
- Login Pattern: [normal/anomalous]
- Related Cases: [...]
- Recommendation: [Close as FP | Escalate to Tier 2]

Read the full file on GitHub · 147 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 13d ago First seen · 147 lines · 50 tokens per session scan A bd45371b70d1

Subscribe to this mod's changes

triage-suspicious-login is a skill published in the GitHub repository dandye/ai-runbooks (126 stars, last pushed 29d ago), licensed Apache-2.0. It adds 50 tokens to every session and 1,022 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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