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email-security

email-security

github.com/zhaoxuya520Security43.7k1.1k installsUpdated 5w ago
Repository

About email-security

An email security analysis skill for security assessors, covering phishing review, authentication checks, and tenant control recommendations. It emphasizes authorization and avoiding delivery of malicious samples to real users.

Key features

  1. 01Check headers and SPF, DKIM, DMARC alignment
  2. 02Analyze phishing URLs, attachments, and IOCs
  3. 03Identify BEC, brand spoofing, and reply-address mismatches
  4. 04Review anti-phishing policies, MFA, and OAuth consent

Use cases

  1. 01Analyze suspicious email and document detectable IOCs
  2. 02Assess SPF, DKIM, and DMARC configuration
  3. 03Design authorized security-awareness exercises

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/zhaoxuya520/reverse-skill --skill email-security

After installing, type/email-securityin Claude Code to confirm it loaded.

Bundled filesreferences/email-auth-checklist.md

Details

From the project README

Email Security & Phishing Analysis

ACTION REQUIRED(读完后立刻执行)

  1. NOW: 确认授权(分析样本邮件 / 租户配置评审)
  2. NOW: 不向真实用户二次投递恶意样本
  3. ACT: 头认证 → 内容/URL → 附件沙箱 → 租户控制面建议

适用场景

  • 钓鱼邮件拆解与 IOC
  • SPF/DKIM/DMARC 配置评估
  • BEC 商务邮件欺诈模式
  • OAuth 应用钓鱼 / 邮箱令牌滥用(联合 llm/cloud 身份)
  • 安全意识演练设计(授权)

工作流

□ 完整原始头:Received 链、From/Return-Path 一致性
□ SPF/DKIM/DMARC 对齐结果
□ URL 沙箱与附件静态(联合 malware-analysis)
□ 仿冒品牌与回复地址差异
□ 租户:反钓鱼策略、外部标记、MFA、OAuth app 同意

工具链

工具用途
邮件客户端「查看源」头
dig/nslookupSPF/DMARC 记录
urlscan / 沙箱链接与附件
租户管理中心策略

参考

  • references/email-auth-checklist.md
  • ../malware-analysis/ ../attack-chain/(钓鱼阶段) ../windows-ad/(令牌)

路由上下文

上游: MASTER R36
MUST NOT: 未授权对第三方域群发测试钓鱼

任务完成自检

  • 头认证结论是否完整?
  • IOC 是否可检测化(联合 threat-hunting)?
  • Checklist?

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