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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.

Skill by john0123412

IndexedMIT★ 4
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

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About

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

Use cases: security, research, productivity

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What's inside

Skill 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.
License
MIT
Instructions
51 lines in SKILL.md · view on GitHub

Files (2)

  • SKILL.md
  • email-auth-checklist.md · references/

SKILL.md (first lines)

# 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

```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)

## 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?

From john0123412/PawnLogic, MIT.

Signals

Stars
4
Forks
2
Open issues
0
Last commit (this folder)
Aug 10, 2026 (2 months ago)
Last release
Oct 24, 2026 (7 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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email-security skill. Agent Mart. https://agentmart.dev/skills/john0123412-email-security (last updated 2026-10-24)