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 Apr 24th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Suspicious message with unscannable Vercel link	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Evasion Content analysis Header analysis Sender analysis URL analysis
Suspicious newly registered reply-to domain with engaging financial or urgent language	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis Whois
Suspicious recipient pattern and language with low reputation link to login	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis URL screenshot
Suspicious recipients pattern with NLU credential theft indicators	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Content analysis Header analysis Natural Language Understanding URL analysis
Suspicious recipients pattern with no Compauth pass and suspicious content	Sublime Security	3mo ago Jan 12th, 2026	Content analysis Computer Vision Header analysis Natural Language Understanding URL analysis URL screenshot
Suspicious request for financial information	Sublime Security	4mo ago Dec 6th, 2025	BEC/Fraud Free email provider Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Sender analysis
Suspicious SharePoint file sharing	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Free email provider Free file host OneNote PDF Content analysis Header analysis Sender analysis URL analysis
Targeting: Specific AOL address	Sublime Security	25d ago Mar 31st, 2026	Spam Social engineering Header analysis
Tax Form: W-8BEN solicitation	Sublime Security	2mo ago Feb 23rd, 2026	BEC/Fraud Credential Phishing Social engineering Content analysis Header analysis URL analysis
Unusually long local part from untrusted sender address	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Spam Evasion Header analysis Sender analysis
VIP / Executive impersonation in subject (untrusted)	Sublime Security	8mo ago Aug 14th, 2025	BEC/Fraud Impersonation: VIP Header analysis Sender analysis
VIP / Executive impersonation (strict match, untrusted)	Sublime Security	1mo ago Feb 25th, 2026	BEC/Fraud Impersonation: VIP Header analysis Sender analysis
VIP impersonation: Fake thread with display name match, email mismatch	Sublime Security	22d ago Apr 3rd, 2026	BEC/Fraud Evasion Impersonation: VIP Social engineering Spoofing Content analysis Header analysis Sender analysis Whois
VIP Impersonation via Google Group relay with suspicious indicators	Sublime Security	5mo ago Nov 12th, 2025	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 with charitable donation fraud	Sublime Security	5mo ago Nov 12th, 2025	BEC/Fraud Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
VIP impersonation with invoicing request	Sublime Security	2y ago Apr 23rd, 2024	BEC/Fraud Impersonation: VIP Content analysis Header analysis Natural Language Understanding
VIP impersonation with w2 request with reply-to mismatch	Sublime Security	1mo ago Mar 12th, 2026	BEC/Fraud Impersonation: VIP Content analysis Header analysis Natural Language Understanding
VIP local_part impersonation from unsolicited sender	Sublime Security	8mo ago Aug 12th, 2025	Impersonation: VIP Spoofing Header analysis Sender analysis
Xero infrastructure abuse	Sublime Security	5mo ago Nov 3rd, 2025	Credential Phishing Evasion Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
X (Twitter) impersonation with credential phishing motives	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Impersonation: Brand Social engineering Computer Vision File analysis Header analysis Optical Character Recognition Natural Language Understanding Sender analysis
Zoom Events newsletter abuse	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Free file host Free subdomain host Social engineering Impersonation: Brand Header analysis HTML analysis Natural Language Understanding URL analysis

371 Rules

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