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email-security

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

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tessl review fix ./skills/email-security/SKILL.md
SKILL.md
Quality
Evals
Security

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」
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?
Repository
zhaoxuya520/reverse-skill
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