Spearphishing targets specific individuals using personalized, researched content that bypasses generic spam filters. Email security gateways (SEGs) like Microsoft Defender for Office 365, Proofpoint,
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Before installing skills in Cursor, ensure your development environment meets these requirements:
node --versiondetecting-spearphishing-with-email-gatewayExecute the skills CLI command in your project's root directory to begin installation:
Fetches detecting-spearphishing-with-email-gateway from mukul975/Anthropic-Cybersecurity-Skills and configures it for Cursor.
The CLI shows a list of agents. Use arrow keys and space to select Cursor:
Confirm successful installation by checking the skill directory location:
Restart Cursor to activate detecting-spearphishing-with-email-gateway. Access via /detecting-spearphishing-with-email-gateway in your agent's command palette.
We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.
Skills execute code in your environment. Always review source, verify the publisher, and test in isolation before production.
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| name | detecting-spearphishing-with-email-gateway |
| description | Spearphishing targets specific individuals using personalized, researched content that bypasses generic spam filters. Email security gateways (SEGs) like Microsoft Defender for Office 365, Proofpoint, |
| domain | cybersecurity |
| subdomain | phishing-defense |
| tags | - phishing - email-security - social-engineering - dmarc - awareness - spearphishing - email-gateway |
| version | '1.0' |
| author | mahipal |
| license | Apache-2.0 |
| nist_csf | - PR.AT-01 - DE.CM-09 - RS.CO-02 - DE.AE-02 |
Spearphishing targets specific individuals using personalized, researched content that bypasses generic spam filters. Email security gateways (SEGs) like Microsoft Defender for Office 365, Proofpoint, Mimecast, and Barracuda provide advanced detection capabilities including behavioral analysis, URL detonation, attachment sandboxing, and impersonation detection. This skill covers configuring these gateways to detect and block targeted phishing attacks.
Microsoft Defender for Office 365:
Security > Anti-phishing policies > Impersonation settings
- Enable user impersonation protection for VIPs
- Enable domain impersonation protection
- Add protected users (CEO, CFO, HR Director)
- Set action: Quarantine message
Proofpoint:
Email Protection > Impostor Classifier
- Enable display name spoofing detection
- Configure lookalike domain detection
- Set Impostor threshold sensitivity
Use the scripts/process.py to analyze email gateway logs, identify spearphishing patterns, and generate custom detection rules.
Prerequisites
Time Estimate
15-45 minutes depending on use case complexity
Steps
Common Pitfalls
✓ Do
✗ Don't
💡 Pro Tips
✓ Use when
Use when skill capabilities match your task, clear ROI on time saved, and you can validate outputs. Best for repetitive tasks, learning, and quality improvement.
✗ Avoid when
Avoid when task requires deep expertise you can't validate, involves sensitive decisions, or when learning process is more valuable than speed of completion.
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
We added detecting-spearphishing-with-email-gateway from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
Registry listing for detecting-spearphishing-with-email-gateway matched our evaluation — installs cleanly and behaves as described in the markdown.
I recommend detecting-spearphishing-with-email-gateway for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
Solid pick for teams standardizing on skills: detecting-spearphishing-with-email-gateway is focused, and the summary matches what you get after install.
Useful defaults in detecting-spearphishing-with-email-gateway — fewer surprises than typical one-off scripts, and it plays nicely with `npx skills` flows.
Solid pick for teams standardizing on skills: detecting-spearphishing-with-email-gateway is focused, and the summary matches what you get after install.
I recommend detecting-spearphishing-with-email-gateway for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
Registry listing for detecting-spearphishing-with-email-gateway matched our evaluation — installs cleanly and behaves as described in the markdown.
detecting-spearphishing-with-email-gateway reduced setup friction for our internal harness; good balance of opinion and flexibility.
Solid pick for teams standardizing on skills: detecting-spearphishing-with-email-gateway is focused, and the summary matches what you get after install.
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