Abnormal Security Threats

Abnormal Security Threats is a skill for Claude Code from WYRE-AI/msp-claude-plugins. It costs 47 tokens per session (3,281 once invoked), scanned B, original, Apache-2.0.

A security analysis guide for identifying email threats such as phishing, malware, business email compromise, and credential theft in Abnormal Security.

In plain words
What is it for?
Use it to investigate detected email threats, assess attack methods and severity, and plan remediation. It does not cover account takeover, message-header forensics, or quarantine release.
Why use it?
It helps distinguish different attack types, judge their severity, and choose investigation or response steps.

Skill for Claude Code

Written for Claude Code: when-to-use in frontmatter.

Part of the abnormal-security plugin — 3 skills, 3 commands, 2 agents shipped together

Good fit Use it to investigate detected email threats, assess attack methods and severity, and plan remediation. It does not cover account takeover, message-header forensics, or quarantine release.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wyre-ai/msp-claude-plugins/threats
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 WYRE-AI/msp-claude-plugins --skill threats
Clone the repo
git clone --depth 1 https://github.com/WYRE-AI/msp-claude-plugins

Made for: Claude Code.

Or install abnormal-security, the plugin that ships this one along with the rest of its 3 skills, 3 commands, 2 agents.

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 Abnormal Security Threats

README.md
[![agentmods](https://agentmods.dev/badge/skills/wyre-ai/msp-claude-plugins/threats/github.svg)](https://agentmods.dev/skills/wyre-ai/msp-claude-plugins/threats)
Your own site
<a href="https://agentmods.dev/skills/wyre-ai/msp-claude-plugins/threats"><img src="https://agentmods.dev/badge/skills/wyre-ai/msp-claude-plugins/threats/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Abnormal Security Threats

Your own site · 80×15
<a href="https://agentmods.dev/skills/wyre-ai/msp-claude-plugins/threats"><img src="https://agentmods.dev/badge/skills/wyre-ai/msp-claude-plugins/threats.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,281 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00047 $0.03281
Opus 5.5 $0.00019 $0.01312
Sonnet 5.5 $0.00009 $0.00656
Haiku 4.5 $0.00005 $0.00328

Measured 1mo ago against content hash 6b118fe3f1ee, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

Abnormal Security Threats scanned grade B with 1 finding 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 1mo 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.

Harvests environment variablesmediumData exfiltration

Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.

| **Credential Phishing** | Emails designed to harvest credentials via fake login pages | Medium - Critical |

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

msp-claude-plugins/abnormal/abnormal-security/skills/threats/SKILL.md · 299 lines

How it starts

The opening of the file, as written. The whole thing — 299 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Abnormal Security Threat Detection & Analysis

Overview

Abnormal Security uses behavioral AI to detect email threats that bypass traditional secure email gateways (SEGs). Unlike signature or rule-based detection, Abnormal profiles normal communication patterns and detects deviations indicative of attacks. This skill covers threat types, attack vectors, severity assessment, remediation, and investigation workflows.

Anti-triggers

  • An email a user reported to the abuse mailbox — those arrive as cases carrying their own AI judgment and action set; use Abnormal Security Cases.
  • A mailbox behaving strangely rather than an email arriving — impossible travel, new inbox rules, and lateral sending are account compromise, and this server exposes no account-takeover surface at all. Investigate identity in the M365 tenant instead; use cipp-users.
  • Header, SPF/DKIM/DMARC, or attachment forensics on one message — use Abnormal Security Messages.
  • Releasing something from a quarantine queue — Abnormal has no gateway queue. It inspects mail post-delivery through the M365 API and pulls it back out of inboxes. Anything sitting in a hold queue belongs to the gateway holding it: SpamTitan Quarantine, Mimecast Message Tracking, or Proofpoint Quarantine.
  • A threat the gateway already stopped — mail blocked before delivery never reaches the mailbox, so Abnormal never sees it. Search the gateway's own logs.
  • The same mail flagged by Check Point Harmony Email — Avanan is the other API-based, post-delivery platform on this stack and produces its own threat records; use avanan-threats.

Threat Types

Type Description Severity Range
BEC (Business Email Compromise) Impersonation of executives or trusted contacts to request financial actions High - Critical
Credential Phishing Emails designed to harvest credentials via fake login pages Medium - Critical
Malware Emails containing malicious attachments or links to malware downloads High - Critical
Extortion Threatening emails demanding payment (sextortion, DDoS threats) Medium - High
Social Engineering Manipulation attacks using urgency, authority, or trust Medium - Critical
Spam Unsolicited bulk email Low
Graymail Marketing, newsletters, and promotional content Low
Scam Advance-fee fraud, fake invoices, lottery scams Medium - High
Supply Chain Compromise Attacks from compromised vendor or partner email accounts Critical

Read the full file on GitHub · 299 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. 1mo ago First seen · 299 lines · 47 tokens per session scan B 6b118fe3f1ee

Subscribe to this mod's changes

Abnormal Security Threats is a skill published in the GitHub repository WYRE-AI/msp-claude-plugins (49 stars, last pushed 4d ago), licensed Apache-2.0. It adds 47 tokens to every session and 3,281 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it B with 1 finding (harvests environment variables). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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