Sublime Core Feed

This repo contains open-source Rules for Sublime, a free and open platform for detecting and preventing email attacks like BEC, malware, and credential phishing.

Sublime Security

Last updated Oct 23rd, 2026

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GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Service abuse: PayPal manager account creation with callback scam indicators	Sublime Security	4mo ago Jun 2nd, 2026	Callback Phishing Credential Phishing Impersonation: Brand Social engineering Spoofing Sender analysis Content analysis Natural Language Understanding
Service abuse: Zohodesk reply-to mismatch with job scam indicators	Sublime Security	3mo ago Jul 22nd, 2026	BEC/Fraud Spam Social engineering Out of band pivot Spoofing Header analysis Sender analysis Natural Language Understanding
Spam: Spoofed Outlook mailer with unsubscribe and reference ID footer	Sublime Security	2mo ago Aug 21st, 2026	Spam Social engineering Spoofing Content analysis Header analysis
SPF temp error	Sublime Security	9mo ago Jan 12th, 2026	Spoofing Header analysis
Spoofable internal domain with suspicious signals	Sublime Security	1y ago Jul 23rd, 2025	Credential Phishing Free file host Free subdomain host Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Spoofing: Hidden Outlook headers in self-addressed forwards	Sublime Security	19d ago Oct 6th, 2026	BEC/Fraud Credential Phishing Spoofing Evasion Impersonation: Employee Social engineering Header analysis HTML analysis XML analysis Sender analysis Natural Language Understanding
Vendor impersonation: Thread hijacking with typosquat domain	Sublime Security	9mo ago Jan 12th, 2026	BEC/Fraud Lookalike domain Social engineering Spoofing Content analysis Natural Language Understanding Sender analysis Whois
VIP impersonation: Fabricated thread history with fake VIP recipients	Sublime Security	3mo ago Jul 8th, 2026	BEC/Fraud Impersonation: VIP Social engineering Evasion Spoofing Content analysis Header analysis Sender analysis
VIP impersonation: Fake thread with display name match, email mismatch	Sublime Security	6mo ago Apr 3rd, 2026	BEC/Fraud Evasion Impersonation: VIP Social engineering Spoofing Content analysis Header analysis Sender analysis Whois
VIP impersonation: Fake thread with name-in-brackets header artifact	Sublime Security	4d ago Oct 21st, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Content analysis Header analysis Sender analysis
VIP impersonation: Fake thread with VIPs missing email metadata	Sublime Security	2mo ago Aug 11th, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Natural Language Understanding Header analysis Content analysis Sender analysis
VIP Impersonation via Google Group relay with suspicious indicators	Sublime Security	2mo ago Aug 5th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Free email provider Impersonation: Employee Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
VIP Impersonation: VIP handoff with fake forwarded invoice thread	Sublime Security	2mo ago Aug 17th, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Out of band pivot Header analysis Content analysis URL analysis Sender analysis
VIP impersonation: VIP name within a delimited subject with fake previous threads	Sublime Security	9d ago Oct 16th, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Content analysis Sender analysis Header analysis
VIP local_part impersonation from unsolicited sender	Sublime Security	1mo ago Sep 23rd, 2026	Impersonation: VIP Spoofing Header analysis Sender analysis

65 Rules

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