Mmcp.market

email-security skill

by zhaoxuya520·zhaoxuya520/reverse-skill·39k stars·MIT

Use for authorized email security review including phishing analysis, header authentication (SPF/DKIM/DMARC), BEC patterns, and mailbox token abuse research.

A100/100content scan

Is the email-security skill safe?

Clean: nothing in its files matched our rules. We read 2 files in the folder on 2026-09-28.

No findings.

Install the email-security skill

A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description. 

git clone --depth 1 https://github.com/zhaoxuya520/reverse-skill.git /tmp/reverse-skill
mkdir -p ~/.claude/skills
cp -r /tmp/reverse-skill/skills/email-security ~/.claude/skills/email-security
available in every project

In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub

The instructions your agent would load

SKILL.md as published, without the frontmatter. Read it on GitHub

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

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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