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 Jul 27th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Service abuse: Zoom Clips with unregistered reply-to domain	Sublime Security	10d ago Jul 17th, 2026	Spam Social engineering Evasion Sender analysis Header analysis Whois
Service Abuse: Zoom with freemail reply-to and recipient address in greeting	Sublime Security	2mo ago May 6th, 2026	Spam Free email provider Social engineering Sender analysis Header analysis Content analysis
Service abuse: Zoom with newly registered reply-to domain	Sublime Security	2mo ago May 4th, 2026	Spam Social engineering Evasion Sender analysis Header analysis Whois
Sharepoint file share with suspicious recipients pattern	Sublime Security	2y ago Mar 27th, 2024	Credential Phishing Malware/Ransomware Evasion Content analysis Header analysis URL analysis
Sharepoint link likely unrelated to sender	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Lookalike domain OneNote PDF Social engineering URL analysis Sender analysis Header analysis HTML analysis
Sharepoint online with external recipients and external display name	@vector_sec	3y ago Aug 17th, 2023	Credential Phishing Spam Evasion Content analysis Header analysis Sender analysis
SharePoint OTP for filename matching org name	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis
Shopify infrastructure abuse	Sublime Security	2y ago Nov 13th, 2024	Credential Phishing Spam Evasion Free subdomain host Impersonation: Brand Social engineering Content analysis Header analysis URL analysis
Spam: BlackBaud infrastructure abuse	Sublime Security	1mo ago Jun 5th, 2026	Spam Evasion Impersonation: Brand Image as content Social engineering Content analysis Header analysis
Spam: Fake dating profile notification	Sublime Security	4mo ago Mar 20th, 2026	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Spam: Firebase password reset from suspicious sender	Sublime Security	7mo ago Dec 2nd, 2025	Credential Phishing Spam Evasion Social engineering Header analysis Sender analysis URL analysis
Spam: Link to blob.core.windows.net from new domain (<30d)	Sublime Security	1y ago Jul 16th, 2025	Spam Free subdomain host Header analysis URL analysis Sender analysis
Spam: Mastercard promotional content with image-based body	Sublime Security	8mo ago Nov 5th, 2025	Credential Phishing Spam Image as content Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Spam: Personalized subject and greetings via Salesforce Marketing Cloud	Sublime Security	8mo ago Nov 3rd, 2025	Spam Social engineering Content analysis Header analysis
Spam: Sendersrv.com with financial communications and unsubscribe language	Sublime Security	5mo ago Feb 24th, 2026	Spam Evasion Social engineering Header analysis Content analysis Natural Language Understanding Sender analysis
Spam: Sexually explicit content with emoji in subject from freemail provider	Sublime Security	4mo ago Mar 10th, 2026	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Spam: Single recipient duplicated in cc	Sublime Security	1mo ago Jun 5th, 2026	Spam Impersonation: Brand Social engineering Header analysis Content analysis URL analysis Sender analysis
Spam: Unsolicited WordPress account creation or password reset request	Sublime Security	8mo ago Nov 24th, 2025	Spam Social engineering Header analysis Sender analysis URL analysis
SPF temp error	Sublime Security	6mo 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
Stripe invoice abuse	Sublime Security	13d ago Jul 14th, 2026	BEC/Fraud Callback Phishing PDF File analysis Header analysis
Subject and sender display name contains matching long alphanumeric string	Sublime Security	6mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
Subject: Suspicious bracketed reference	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Evasion Impersonation: Brand Header analysis Content analysis
Suspicious attachment with unscannable Cloudflare link	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Evasion PDF Social engineering Impersonation: Employee Impersonation: VIP File analysis URL analysis Sender analysis Content analysis Header analysis Natural Language Understanding
Suspicious DocuSign share from new domain	Sublime Security	11mo ago Aug 5th, 2025	BEC/Fraud Credential Phishing Evasion Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Suspicious Links to Cloudflare R2 and Edge Services	Sublime Security	6mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam Free file host Header analysis Sender analysis URL analysis
Suspicious mailer received from Gmail servers	Sublime Security	1y ago Jul 16th, 2025	Callback Phishing Spam Free email provider Social engineering Header analysis
Suspicious message with unscannable Cloudflare link	Sublime Security	10mo ago Sep 22nd, 2025	Credential Phishing Content analysis Header analysis URL analysis Sender analysis
Suspicious message with unscannable Vercel link	Sublime Security	1y 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	2mo ago May 6th, 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	6mo 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	6mo 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	6mo ago Jan 12th, 2026	Content analysis Computer Vision Header analysis Natural Language Understanding URL analysis URL screenshot
Suspicious request for financial information	Sublime Security	1mo ago Jun 25th, 2026	BEC/Fraud Free email provider Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Sender analysis
Suspicious SharePoint file sharing	Sublime Security	11mo 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	3mo ago Mar 31st, 2026	Spam Social engineering Header analysis
Tax Form: W-8BEN solicitation	Sublime Security	5mo 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	11mo ago Aug 5th, 2025	Credential Phishing Spam Evasion Header analysis Sender analysis
VIP / Executive impersonation in subject (untrusted)	Sublime Security	11mo ago Aug 14th, 2025	BEC/Fraud Impersonation: VIP Header analysis Sender analysis
VIP / Executive impersonation (strict match, untrusted)	Sublime Security	5mo ago Feb 25th, 2026	BEC/Fraud Impersonation: VIP Header analysis Sender analysis
VIP impersonation: Fabricated thread history with fake VIP recipients	Sublime Security	19d 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	3mo ago Apr 3rd, 2026	BEC/Fraud Evasion Impersonation: VIP Social engineering Spoofing Content analysis Header analysis Sender analysis Whois
VIP impersonation: Fake thread with VIPs missing email metadata	Sublime Security	14d ago Jul 13th, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Natural Language Understanding Header analysis Content analysis Sender analysis
VIP impersonation: Payment handoff with VIP display name authored fake threads	Sublime Security	14d ago Jul 13th, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Natural Language Understanding Sender analysis Header analysis
VIP Impersonation via Google Group relay with suspicious indicators	Sublime Security	1mo ago Jun 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 name within a delimited subject with fake previous threads	Sublime Security	19d ago Jul 8th, 2026	BEC/Fraud Impersonation: VIP Social engineering Spoofing Content analysis Sender analysis Header analysis
VIP impersonation: VIP payment redirect handoff via fake threads	Sublime Security	14d ago Jul 13th, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Natural Language Understanding Sender analysis Header analysis
VIP impersonation with charitable donation fraud	Sublime Security	1mo ago Jun 5th, 2026	BEC/Fraud Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
VIP impersonation with invoicing request	Sublime Security	49m ago Jul 27th, 2026	BEC/Fraud Impersonation: VIP Content analysis Header analysis Natural Language Understanding
VIP impersonation with w2 request with reply-to mismatch	Sublime Security	4mo ago Mar 12th, 2026	BEC/Fraud Impersonation: VIP Content analysis Header analysis Natural Language Understanding

404 Rules

Page 8 of 9