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
Reconnaissance: Hotel booking reply-to redirect	Sublime Security	2mo ago Jan 27th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis
Reconnaissance: Large unknown recipient list	Sublime Security	5mo ago Nov 24th, 2025	Reconnaissance Content analysis Header analysis Sender analysis
Reconnaissance: Short generic greeting message	Sublime Security	2mo ago Jan 27th, 2026	BEC/Fraud Callback Phishing Social engineering Free email provider Content analysis Header analysis Natural Language Understanding Sender analysis
Recruitee Infrastructure Abuse	Sublime Security	9mo ago Jul 16th, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis Whois
Request for Quote or Purchase (RFQ\|RFP) with HTML smuggling attachment	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Content analysis File analysis HTML analysis Javascript analysis Natural Language Understanding URL analysis
Request for Quote or Purchase (RFQ\|RFP) with suspicious sender or recipient pattern	Sublime Security	1mo ago Mar 9th, 2026	BEC/Fraud Evasion Free email provider Content analysis Natural Language Understanding URL analysis
Salesforce infrastructure abuse	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Scam: Piano giveaway	Sublime Security	4mo ago Dec 11th, 2025	BEC/Fraud Free email provider Content analysis Natural Language Understanding Sender analysis
Self-sender with copy/paste instructions and suspicious domains (French/Français)	Sublime Security	9d ago Apr 16th, 2026	Credential Phishing Evasion Free subdomain host Social engineering Content analysis Header analysis Sender analysis
Self-sent fake PDF attachment with misleading link	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Free subdomain host Social engineering Content analysis URL analysis Sender analysis
Sendgrid voicemail phish	Sublime Security	5mo ago Nov 24th, 2025	Credential Phishing Social engineering Content analysis Header analysis
Service abuse: Adobe legitimate domain with document approval language	Sublime Security	3mo ago Jan 23rd, 2026	BEC/Fraud Credential Phishing Social engineering Content analysis Header analysis Sender analysis
Service abuse: Apple TestFlight with suspicious developer reference	Sublime Security	2mo ago Feb 6th, 2026	Spam Social engineering Content analysis HTML analysis Natural Language Understanding Sender analysis URL analysis
Service abuse: AppSheet infrastructure with suspicious indicators	Sublime Security	6mo ago Oct 6th, 2025	Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis Whois
Service abuse: AWS SNS callback scam impersonation	Sublime Security	30d ago Mar 26th, 2026	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
Service abuse: Behance document sharing with suspicious language	Sublime Security	29d ago Mar 27th, 2026	Credential Phishing Free file host Social engineering Content analysis URL analysis
Service Abuse: Box file sharing with credential phishing intent	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Callback Phishing Evasion Social engineering Impersonation: Employee Impersonation: VIP Content analysis Natural Language Understanding Sender analysis Header analysis
Service abuse: Callback phishing via Microsoft Teams invite	Sublime Security	4mo ago Dec 12th, 2025	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis URL analysis Sender analysis
Service abuse: Cisco secure email service with financial request	Sublime Security	6mo ago Oct 1st, 2025	BEC/Fraud Impersonation: Brand Social engineering Evasion Content analysis Header analysis Natural Language Understanding Sender analysis
Service abuse: DocSend share from an unsolicited reply-to address	Sublime Security	1mo ago Mar 4th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis
Service abuse: DocSend share from newly registered domain	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Evasion Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Service abuse: DocuSign notification with suspicious sender or document name	Sublime Security	8mo ago Aug 5th, 2025	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis
Service abuse: DocuSign share from an unsolicited reply-to address	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis
Service abuse: Dropbox share from an unsolicited reply-to address	Sublime Security	8mo ago Aug 5th, 2025	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis
Service abuse: Dropbox share from new domain	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis
Service abuse: Dropbox share with suspicious sender or document name	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis
Service abuse: Facebook business with action required subject	Sublime Security	3d ago Apr 22nd, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Sender analysis
Service abuse: File sharing impersonation with external SharePoint links	Sublime Security	1mo ago Mar 9th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis URL analysis Sender analysis
Service abuse: FlipHTML5 with attachment deception and credential theft language	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Free file host Evasion Content analysis Natural Language Understanding URL analysis
Service abuse: Formester with suspicious link behavior	Sublime Security	4mo ago Dec 19th, 2025	Credential Phishing BEC/Fraud Open redirect Social engineering Free file host Computer Vision Content analysis URL analysis URL screenshot
Service abuse: GetAccept callback scam content	Sublime Security	3mo ago Jan 16th, 2026	Callback Phishing Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
Service Abuse: GoDaddy infrastructure	Sublime Security	3mo ago Jan 7th, 2026	Callback Phishing Extortion Evasion Natural Language Understanding Content analysis
Service abuse: Google Calendar notification with callback scam language	Sublime Security	1mo ago Mar 16th, 2026	Callback Phishing Out of band pivot Social engineering Natural Language Understanding Content analysis Sender analysis
Service abuse: Google classroom solicitation	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Impersonation: Brand Out of band pivot Social engineering Content analysis Header analysis Sender analysis
Service abuse: Google Firebase sender address with suspicious content	Sublime Security	23d ago Apr 2nd, 2026	Spam Credential Phishing Free subdomain host Social engineering Content analysis Header analysis HTML analysis Natural Language Understanding Sender analysis URL analysis Whois
Service Abuse: HelloSign share with suspicious sender or document name	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis
Service abuse: HungerRush domain with SendGrid tracking targeting ProtonMail	Sublime Security	1mo ago Mar 4th, 2026	BEC/Fraud Evasion Sender analysis HTML analysis Content analysis
Service abuse: Meetup.com redirect with brand impersonation	Sublime Security	10d ago Apr 15th, 2026	Credential Phishing Open redirect Impersonation: Brand Evasion URL analysis HTML analysis Content analysis Sender analysis
Service abuse: Microsoft Power Apps callback scam	Sublime Security	26d ago Mar 30th, 2026	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
Service abuse: Microsoft Power Automate callback scam impersonation	Sublime Security	1mo ago Mar 5th, 2026	Callback Phishing Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
Service abuse: Microsoft Power BI callback scam	Sublime Security	3mo ago Jan 22nd, 2026	Callback Phishing Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
Service abuse: Monday.com callback scam	Sublime Security	2mo ago Jan 26th, 2026	Callback Phishing Social engineering Out of band pivot Content analysis Natural Language Understanding Sender analysis
Service abuse: Monday.com infrastructure with phishing intent	Sublime Security	1mo ago Mar 9th, 2026	Credential Phishing Evasion Social engineering QR code Content analysis File analysis Header analysis QR code analysis Sender analysis URL analysis
Service abuse: Nylas tracking subdomain with suspicious content	Sublime Security	1mo ago Mar 6th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis
Service abuse: Payoneer callback scam	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis
Service abuse: QuickBooks notification from new domain	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis
Service abuse: QuickBooks notification with suspicious comments	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis
Service abuse: Recruiting with suspicious language patterns from legitimate platforms	Sublime Security	6mo ago Oct 7th, 2025	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Service abuse: Sendgrid credential theft with personalized request targeting single recipient	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Natural Language Understanding Sender analysis Content analysis
Service abuse: SendGrid-formatted link with actor-controlled fragment	Sublime Security	5mo ago Nov 24th, 2025	Credential Phishing Evasion Social engineering Content analysis URL analysis

522 Rules

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