8 YAMLs for the email cohort per Appendix B: open-relay abuse, mass phishing, phishing-kit X-Mailer signatures, IDN/punycode URLs, sender masquerade, malicious attachment, BEC, encoded payload in body. EmailLifter (E.3.12) consumes by rule_id. test_email_rules.py: YAML-present + inert-in-v0 + xfail(strict) precision case gated on E.3.12.
23 lines
490 B
YAML
23 lines
490 B
YAML
rule_id: R0043
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rule_version: 1
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name: phishing_kit_xmailer
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description: |
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X-Mailer header matches a curated phishing-kit signature DB
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(PHPMailer-of-known-kits, GreatHorn known-bad, etc.).
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applies_to:
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- email
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match:
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kind: lifter:email_xmailer_kit
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catalog: phishing_kits
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emits:
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- tactic: TA0001
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technique_id: T1566
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confidence: 0.9
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- tactic: TA0042
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technique_id: T1588
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sub_technique_id: T1588.001
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confidence: 0.85
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evidence_fields:
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- x_mailer
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- matched_kit
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