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

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Reconnaissance: Hotel booking reply-to redirect	Sublime Security	9mo ago Jan 27th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis
Reconnaissance: Large unknown recipient list	Sublime Security	1mo ago Sep 23rd, 2026	Reconnaissance Content analysis Header analysis Sender analysis
Reconnaissance: Short generic greeting message	Sublime Security	1mo ago Aug 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	1y ago Jul 16th, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis Whois
Russia return-path TLD (untrusted sender)	Sublime Security	8mo ago Feb 13th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Header analysis Sender analysis
Scam: Fake estate sale offering welding equipment and tools	Sublime Security	11d ago Oct 14th, 2026	BEC/Fraud Social engineering Free email provider Out of band pivot Content analysis Sender analysis Header analysis
Scam: Piano giveaway	Sublime Security	10mo ago Dec 11th, 2025	BEC/Fraud Free email provider Content analysis Natural Language Understanding Sender analysis
Scam soliciting employer review/rating	Sublime Security	4mo ago Jun 12th, 2026	BEC/Fraud Credential Phishing Social engineering Impersonation: Brand Content analysis Natural Language Understanding Header analysis Sender analysis
Self-impersonation: Sender matches recipient with bolded name and suspicious link	Sublime Security	4mo ago Jun 16th, 2026	Credential Phishing Evasion Social engineering Header analysis HTML analysis Sender analysis
Self-sender with copy/paste instructions and suspicious domains (French/Français)	Sublime Security	6mo 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	1mo ago Sep 9th, 2026	Credential Phishing Evasion Free subdomain host Social engineering Content analysis URL analysis Sender analysis
Sender: IP address in local part	Sublime Security	7mo ago Mar 12th, 2026	Spam Credential Phishing BEC/Fraud Evasion Spoofing Sender analysis
Sender: Local part built from recipient domain and mailbox	Sublime Security	2mo ago Aug 20th, 2026	BEC/Fraud Credential Phishing Spoofing Evasion Impersonation: Employee Header analysis Sender analysis
Sender name contains Active Directory distinguished name	Sublime Security	2y ago Nov 13th, 2024	Credential Phishing Sender analysis
Sender: Suspicious CC suffix in sender display name	Sublime Security	1mo ago Sep 16th, 2026	BEC/Fraud Credential Phishing Social engineering Spoofing Sender analysis
Service abuse: Adobe Creative Cloud share from an unsolicited sender address	Sublime Security	1y ago Oct 22nd, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis
Service abuse: Adobe legitimate domain with document approval language	Sublime Security	9mo ago Jan 23rd, 2026	BEC/Fraud Credential Phishing Social engineering Content analysis Header analysis Sender analysis
Service abuse: Adobe message from newly registered domain	Sublime Security	2mo ago Jul 31st, 2026	Credential Phishing Evasion Social engineering Lookalike domain Sender analysis Header analysis URL analysis Whois
Service abuse: Adobe share containing newly observed email address domain	Sublime Security	2mo ago Jul 31st, 2026	Credential Phishing BEC/Fraud Out of band pivot Social engineering URL analysis Sender analysis Content analysis
Service abuse: Adobe Sign notification from an unsolicited reply-to address	Sublime Security	1y ago Aug 5th, 2025	BEC/Fraud Callback Phishing Spam Social engineering Impersonation: Brand Header analysis Sender analysis
Service abuse: Amazon invitation with suspected callback phishing	Sublime Security	5mo ago May 22nd, 2026	Callback Phishing Out of band pivot Social engineering Content analysis HTML analysis Sender analysis
Service Abuse: American Express callback scam	Sublime Security	19d ago Oct 6th, 2026	Callback Phishing Impersonation: Brand Social engineering Natural Language Understanding Content analysis Sender analysis
Service abuse: Apple callback scam	Sublime Security	26d ago Sep 29th, 2026	Callback Phishing Social engineering Out of band pivot Sender analysis Header analysis Natural Language Understanding
Service abuse: Apple TestFlight with suspicious developer reference	Sublime Security	8mo ago Feb 6th, 2026	Spam Social engineering Content analysis HTML analysis Natural Language Understanding Sender analysis URL analysis
Service abuse: Arketa notification callback scam	Sublime Security	2mo ago Aug 19th, 2026	Callback Phishing Social engineering Impersonation: Brand Evasion Out of band pivot Natural Language Understanding Content analysis Sender analysis
Service abuse: AWS SNS callback scam impersonation	Sublime Security	2mo ago Aug 20th, 2026	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
Service Abuse: Box file sharing with credential phishing intent	Sublime Security	9mo 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: Calendly callback scam detection	Sublime Security	3mo ago Jul 14th, 2026	Callback Phishing Social engineering Impersonation: Brand Natural Language Understanding Sender analysis
Service abuse: Callback phishing via Microsoft Teams invite	Sublime Security	10mo 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	1y ago Oct 1st, 2025	BEC/Fraud Impersonation: Brand Social engineering Evasion Content analysis Header analysis Natural Language Understanding Sender analysis
Service abuse: Cognito Forms with short body from unknown sender	Sublime Security	2mo ago Aug 4th, 2026	Credential Phishing Social engineering Content analysis Sender analysis URL analysis
Service abuse: Conceptboard VIP impersonation lure	Sublime Security	16d ago Oct 9th, 2026	BEC/Fraud Spam Impersonation: VIP Social engineering Content analysis Sender analysis
Service abuse: Coursera callback scam	Sublime Security	3mo ago Jul 21st, 2026	Callback Phishing Impersonation: Brand Lookalike domain Social engineering Sender analysis URL analysis Whois
Service abuse: Demio notifications with suspicious content patterns	Sublime Security	5mo ago May 11th, 2026	Spam Social engineering Impersonation: Brand Sender analysis Content analysis
Service abuse: DocSend share from an unsolicited reply-to address	Sublime Security	4mo ago Jun 18th, 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	9mo 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	1y 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	9mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis
Service abuse: Domains By Proxy sender	Sublime Security	7mo ago Mar 18th, 2026	Spam Credential Phishing BEC/Fraud Evasion Social engineering Header analysis Sender analysis
Service abuse: Dropbox share from an unsolicited reply-to address	Sublime Security	1y 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	9mo 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	27d ago Sep 28th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis
Service abuse: Elastic alerts extortion	Sublime Security	5mo ago May 21st, 2026	Extortion Impersonation: Brand Social engineering Natural Language Understanding Sender analysis
Service Abuse: ExactTarget with suspicious sender indicators	Sublime Security	11mo ago Nov 8th, 2025	Credential Phishing BEC/Fraud Evasion Social engineering Header analysis Sender analysis
Service abuse: Facebook business with action required subject	Sublime Security	6mo ago Apr 22nd, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Sender analysis
Service abuse: Facebook mail notification callback scam	Sublime Security	2mo ago Aug 25th, 2026	Callback Phishing Impersonation: Brand Social engineering Spoofing Sender analysis Natural Language Understanding
Service abuse: Fake loan/funding verification lure via Mailgun	Sublime Security	3mo ago Jun 29th, 2026	Credential Phishing Impersonation: Brand Evasion Social engineering Sender analysis URL analysis Content analysis
Service abuse: FileMail callback scam	Sublime Security	3mo ago Jul 24th, 2026	Callback Phishing Social engineering Free file host Out of band pivot Natural Language Understanding Sender analysis Content analysis
Service abuse: File sharing impersonation with external SharePoint links	Sublime Security	7mo ago Mar 9th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis URL analysis Sender analysis
Service abuse: Free provider with SendGrid routing	Sublime Security	9mo ago Jan 8th, 2026	Credential Phishing Free email provider Evasion Header analysis Sender analysis

786 Rules

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