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 25th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Link: Microsoft protected message with matching sender and recipient addresses	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis File analysis Header analysis Sender analysis URL analysis
Link: Multistage landing - Abused Adobe Acrobat hosted PDF	Sublime Security	12d ago Jul 14th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Optical Character Recognition URL analysis Header analysis Sender analysis
Link: Multistage landing - Ludus presentation	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Evasion Social engineering Impersonation: Brand Header analysis URL analysis Computer Vision URL screenshot Natural Language Understanding Optical Character Recognition Sender analysis
Link: .onion From Unsolicited Sender	Sublime Security	12mo ago Jul 30th, 2025	Malware/Ransomware Credential Phishing Evasion Social engineering URL analysis Header analysis Sender analysis
Link: PDF filename impersonation with credential theft language	Sublime Security	5mo ago Feb 12th, 2026	Credential Phishing Social engineering Evasion PDF Content analysis Natural Language Understanding Header analysis Sender analysis URL analysis
Link: Personalized URL with recipient address on commonly abused web service	Sublime Security	3mo ago Apr 1st, 2026	Credential Phishing Malware/Ransomware Free file host Social engineering URL analysis Header analysis
Link: Personal SharePoint with invalid recipients and credential theft language	Sublime Security	6mo ago Jan 23rd, 2026	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding URL analysis
Link: Recipient domain in URL path	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Lookalike domain Header analysis Sender analysis URL analysis
Link: Referrer anonymization service from untrusted sender	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Open redirect Evasion Header analysis URL analysis Sender analysis
Link: Romance/Sexual Language With Suspicious Link	Sublime Security	1mo ago Jun 17th, 2026	Spam Social engineering Content analysis Header analysis URL analysis Whois
Link: Self-sender credential theft with configuration placeholder	Sublime Security	1mo ago May 27th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis URL analysis Header analysis
Link: Self-sender with sender org in subject and credential theft indicator	Sublime Security	6mo ago Jan 12th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Header analysis
Link: Self-sent message with quarterly document review request	Sublime Security	30d ago Jun 26th, 2026	BEC/Fraud Credential Phishing Social engineering Evasion Content analysis Header analysis Sender analysis URL analysis
Link: Self-sent PDF lure with subject correlation	Sublime Security	1mo ago Jun 4th, 2026	BEC/Fraud Credential Phishing Social engineering Evasion Header analysis HTML analysis Sender analysis Content analysis
Link: SharePoint OneNote or PDF link with self sender behavior	Sublime Security	4mo ago Feb 27th, 2026	Credential Phishing Evasion Free file host OneNote PDF Header analysis URL analysis Sender analysis
Link: Shortened URL with fragment matching subject	Sublime Security	3mo 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	3mo ago Apr 24th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding URL analysis Sender analysis Header analysis
Link: Squarespace infrastructure abuse	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Spam Impersonation: Brand Social engineering Header analysis URL analysis Sender analysis
Link: Suspicious Sharepoint folder share	Sublime Security	11mo ago Aug 5th, 2025	Credential Phishing Free file host Evasion HTML analysis Header analysis Sender analysis URL analysis
Link: Suspicious wp-admin path from mismatched sender domain	Sublime Security	9d ago Jul 17th, 2026	Credential Phishing Evasion Social engineering Spoofing URL analysis Sender analysis Header analysis
Link: Uncommon SharePoint document type with sender's display name	Sublime Security	11mo 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	5mo ago Feb 5th, 2026	Malware/Ransomware Evasion Social engineering File analysis Header analysis
Mass campaign: Cross Site Scripting (XSS) attempt	Sublime Security	1y 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	6mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Natural Language Understanding Sender analysis
Message traversed multiple onmicrosoft.com tenants	Sublime Security	6mo 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	6mo 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	11mo ago Aug 5th, 2025	BEC/Fraud Credential Phishing Malware/Ransomware Social engineering Header analysis URL analysis Whois
Observed IOC: Malicious reply-to domains	Sublime Security	2mo ago Apr 27th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Domain Social engineering Header analysis Sender analysis
Observed IOC: Malicious reply-to email addresses	Sublime Security	2mo ago Apr 27th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Email address Social engineering Header analysis Sender analysis
Observed IOC: Malicious reply-to root domains	Sublime Security	2mo ago Apr 27th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Domain Social engineering Header analysis Sender analysis
Observed IOC: Malicious sender domains	Sublime Security	19h ago Jul 25th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Domain Social engineering Sender analysis Header analysis
Observed IOC: Malicious sender email addresses	Sublime Security	20h ago Jul 25th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Email address Social engineering Sender analysis Header analysis
Observed IOC: Malicious sender root domains	Sublime Security	1mo ago Jun 12th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Domain Social engineering Sender analysis Header analysis
Open redirect: giving.lluh.org	Sublime Security	1y 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	6mo 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	1mo ago Jun 5th, 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	1y 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	1y 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	1y 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	6mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Open redirect Header analysis URL analysis Sender analysis
Open redirect: slubnaglowie.pl	Sublime Security	1y 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	11mo ago Aug 5th, 2025	Credential Phishing Open redirect Evasion Header analysis URL analysis Sender analysis
PayPal invoice abuse	Sublime Security	1mo ago Jun 4th, 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	6mo 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	3mo 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	5mo ago Feb 5th, 2026	Reconnaissance Content analysis Header analysis Sender analysis
Reconnaissance: Email address harvesting attempt	Sublime Security	5mo 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	5mo ago Feb 25th, 2026	Spam Evasion Social engineering Content analysis Header analysis
Reconnaissance: Empty subject with mismatched reply-to from new sender	Sublime Security	5mo ago Feb 6th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Spoofing Header analysis Sender analysis

404 Rules

Page 6 of 9