Email Security

Bundled with Unleash skills pack. Upstream: https://github.com/zhaoxuya520/reverse-skill

Email Security & Phishing Analysis

ACTION REQUIRED (execute immediately after reading)

1. NOW: confirm authorization (sample email analysis / tenant configuration review)
2. NOW: do not re-deliver malicious samples to real users
3. ACT: header authentication → content/URLs → attachment sandboxing → tenant control-plane recommendations

Applicable Scenarios

• Phishing email teardown and IOCs
• SPF/DKIM/DMARC configuration assessment
• BEC business email compromise patterns
• OAuth application phishing / mailbox token abuse (combined with llm/cloud identity)
• Security awareness exercise design (authorized)

Workflow

□ Full raw headers: Received chain, From/Return-Path consistency
□ SPF/DKIM/DMARC alignment results
□ URL sandbox and static attachment analysis (combined with malware-analysis)
□ Impersonated brands and reply-address discrepancies
□ Tenant: anti-phishing policy, external tagging, MFA, OAuth app consent

Toolchain

References

• references/email-auth-checklist.md
• ../malware-analysis/ ../attack-chain/ (phishing stage) ../windows-ad/ (tokens)

Routing Context

Upstream: MASTER R36
MUST NOT: unauthorized mass test-phishing against third-party domains

Task Completion Self-Check

• Header authentication conclusions complete?
• IOCs made detectable (combined with threat-hunting)?
• Checklist?