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
Link: Shortened URL with fragment matching subject	Sublime Security	16d ago Apr 9th, 2026	Credential Phishing BEC/Fraud Evasion Social engineering Content analysis URL analysis Header analysis
Link: Single character path with credential theft body and self sender behavior or invalid recipient	Sublime Security	8h ago Apr 24th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding URL analysis Sender analysis Header analysis
Link: Squarespace infrastructure abuse	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Spam Impersonation: Brand Social engineering Header analysis URL analysis Sender analysis
Link: Suspicious Sharepoint folder share	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Free file host Evasion HTML analysis Header analysis Sender analysis URL analysis
Link: Uncommon SharePoint document type with sender's display name	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Social engineering OneNote PDF Content analysis Header analysis HTML analysis URL analysis
macOS malware: Compiled AppleScript with document double-extension	Sublime Security	2mo ago Feb 5th, 2026	Malware/Ransomware Evasion Social engineering File analysis Header analysis
Mass campaign: Cross Site Scripting (XSS) attempt	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Spam Exploit Free email provider Scripting Social engineering Content analysis Header analysis Sender analysis
Mass campaign: recipient address in subject, body, and link (untrusted sender)	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Natural Language Understanding Sender analysis
Message traversed multiple onmicrosoft.com tenants	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Free subdomain host Sender analysis Header analysis
Microsoft infrastructure abuse with suspicious patterns	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Evasion Impersonation: Brand Social engineering Header analysis Sender analysis
Newly registered sender or reply-to domain with newly registered linked domain	Sublime Security	8mo ago Aug 5th, 2025	BEC/Fraud Credential Phishing Malware/Ransomware Social engineering Header analysis URL analysis Whois
Observed IOC: Malicious sender domains	Sublime Security	8h ago Apr 24th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Domain Social engineering Sender analysis Header analysis
Observed IOC: Malicious sender email addresses	Sublime Security	8h ago Apr 24th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Email address Social engineering Sender analysis Header analysis
Observed IOC: Malicious sender root domains	Sublime Security	8h ago Apr 24th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Domain Social engineering Sender analysis Header analysis
Open redirect: giving.lluh.org	Sublime Security	11mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis
Open redirect (go2.aspx) leading to Microsoft credential phishing	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Open redirect Content analysis Header analysis URL analysis
Open Redirect: Google domain with /url path and suspicious indicators	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Open redirect Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis
Open redirect: marketing.edinburghairport.com	Sublime Security	11mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis
Open redirect: next2.io	Sublime Security	11mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis
Open redirect: people.anuneo.com	Sublime Security	11mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis
Open redirect: queue.swytchbike.com	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Open redirect Header analysis URL analysis Sender analysis
Open redirect: slubnaglowie.pl	Sublime Security	11mo ago May 23rd, 2025	Credential Phishing Evasion Open redirect Social engineering Content analysis Header analysis Sender analysis URL analysis
Open redirect: Xfinity CMP Redirection to Google AMP	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Open redirect Evasion Header analysis URL analysis Sender analysis
PayPal invoice abuse	Sublime Security	2mo ago Feb 11th, 2026	BEC/Fraud Callback Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
PHP Mailer with common phishing attachments	@vector_sec	3y ago Aug 21st, 2023	Credential Phishing Image as content Header analysis
Potential prompt injection attack in body HTML	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam BEC/Fraud Evasion Social engineering Header analysis HTML analysis Content analysis
QR Code with suspicious indicators	Sublime Security	3d ago Apr 22nd, 2026	Credential Phishing QR code Social engineering Content analysis Header analysis Computer Vision Natural Language Understanding QR code analysis Sender analysis URL analysis
Reconnaissance: All recipients cc/bcc'd or undisclosed	Sublime Security	2mo ago Feb 5th, 2026	Reconnaissance Content analysis Header analysis Sender analysis
Reconnaissance: Email address harvesting attempt	Sublime Security	2mo ago Feb 23rd, 2026	BEC/Fraud Credential Phishing Spam Free email provider Social engineering Content analysis Header analysis Sender analysis URL analysis
Reconnaissance: Empty message from uncommon sender	Sublime Security	1mo ago Feb 25th, 2026	Spam Evasion Social engineering Content analysis Header analysis
Reconnaissance: Empty subject with mismatched reply-to from new sender	Sublime Security	2mo ago Feb 6th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Spoofing Header analysis Sender analysis
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
Russia return-path TLD (untrusted sender)	Sublime Security	2mo ago Feb 13th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Header analysis Sender 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
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
Sendgrid onmicrosoft.com domain phishing	@ajpc500	3mo ago Jan 12th, 2026	Credential Phishing Evasion Header analysis
Sendgrid voicemail phish	Sublime Security	5mo ago Nov 24th, 2025	Credential Phishing Social engineering Content analysis Header analysis
Service abuse: Adobe Creative Cloud share from an unsolicited sender address	Sublime Security	6mo 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	3mo ago Jan 23rd, 2026	BEC/Fraud Credential Phishing Social engineering Content analysis Header analysis Sender analysis
Service abuse: Adobe Sign notification from an unsolicited reply-to address	Sublime Security	8mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Spam Social engineering Impersonation: Brand Header analysis Sender 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: 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: Domains By Proxy sender	Sublime Security	1mo 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	8mo ago Aug 5th, 2025	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis

371 Rules

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