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
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: ExactTarget with suspicious sender indicators	Sublime Security	5mo ago Nov 8th, 2025	Credential Phishing BEC/Fraud Evasion Social engineering Header analysis Sender analysis
Service abuse: Free provider with SendGrid routing	Sublime Security	3mo ago Jan 8th, 2026	Credential Phishing Free email provider Evasion Header analysis Sender analysis
Service abuse: GitHub notification with excessive mentions and suspicious links	Sublime Security	18d ago Apr 7th, 2026	Credential Phishing Malware/Ransomware Free file host Free subdomain host Social engineering Header analysis URL analysis Sender analysis Whois
Service abuse: Google account notification with links to free file host	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Impersonation: Brand Social engineering Free file host Header analysis URL analysis Sender analysis
Service abuse: Google application integration redirecting to suspicious hosts	Sublime Security	4mo ago Dec 17th, 2025	Credential Phishing Malware/Ransomware Evasion Free file host Free subdomain host Open redirect Header analysis Sender analysis URL 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 Drive share from an unsolicited reply-to address	Sublime Security	8mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Credential Phishing Free email provider Social engineering Free file host Header analysis Sender analysis
Service abuse: Google Drive share from new reply-to domain	Sublime Security	5mo ago Nov 13th, 2025	BEC/Fraud Callback Phishing Credential Phishing Free email provider Social engineering Free file host Header analysis Sender analysis Whois
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 from an unsolicited sender address	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis
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: 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: 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: Roomsy with unrelated body content	Sublime Security	4mo ago Dec 2nd, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis Natural Language Understanding
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 impersonation via Sendgrid from new sender	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis
Service abuse: SurveyMonkey survey from newly registered domain	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis
Service abuse: Suspicious Zoom Docs link	Sublime Security	4mo ago Dec 2nd, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis
Service abuse: Task management message sent via SendGrid	Sublime Security	6mo ago Oct 6th, 2025	Credential Phishing Impersonation: Brand Social engineering Evasion Content analysis Header analysis Sender analysis
Service abuse: Trello board invitation with VIP impersonation	Sublime Security	2mo ago Feb 3rd, 2026	Credential Phishing Impersonation: VIP Social engineering Content analysis Header analysis HTML analysis Sender analysis
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	3mo 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	3mo 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	2y ago Jan 17th, 2024	Spam Evasion Impersonation: Brand Image as content Social engineering Content analysis Header analysis
Spam: Fake dating profile notification	Sublime Security	1mo 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	4mo 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	9mo ago Jul 16th, 2025	Spam Free subdomain host Header analysis URL analysis Sender analysis
Spam: Mastercard promotional content with image-based body	Sublime Security	5mo 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	5mo ago Nov 3rd, 2025	Spam Social engineering Content analysis Header analysis
Spam: Sendersrv.com with financial communications and unsubscribe language	Sublime Security	1mo 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	1mo 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	3mo ago Jan 12th, 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	5mo ago Nov 24th, 2025	Spam Social engineering Header analysis Sender analysis URL analysis
SPF temp error	Sublime Security	3mo ago Jan 12th, 2026	Spoofing Header analysis
Spoofable internal domain with suspicious signals	Sublime Security	9mo 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	3mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing PDF File analysis Header analysis
Subject and sender display name contains matching long alphanumeric string	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
Subject: Suspicious bracketed reference	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Impersonation: Brand Header analysis Content analysis
Suspicious attachment with unscannable Cloudflare link	Sublime Security	3mo 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	8mo 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	3mo 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	9mo ago Jul 16th, 2025	Callback Phishing Spam Free email provider Social engineering Header analysis
Suspicious message with unscannable Cloudflare link	Sublime Security	7mo ago Sep 22nd, 2025	Credential Phishing Content analysis Header analysis URL analysis Sender analysis

371 Rules

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