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Email Security

ASecurity

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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  • Added September 23, 2026
ai-agentssecurity

Security analysis

A100/100

Pro scans all 2 files and shows the line behind each finding

Scanned September 23, 2026

npx -y skills add coco-research/coco --skill email-security --agent claude-code

Installs into .claude/skills of the current project.

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SKILL.md
---
name: email-security
description: Use for authorized email security review including phishing analysis, header authentication (SPF/DKIM/DMARC), BEC patterns, and mailbox token abuse research.
user-invocable: true
---

# Email Security & Phishing Analysis

## 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

```text
□ 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/nslookup | SPF/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)

Files in this skill

  • SKILL.md1.1 KB
  • references/email-auth-checklist.md211 B

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