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
Attachment: HTML smuggling 'body onload' with high entropy and suspicious text	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis
Attachment: HTML smuggling Microsoft sign in	Sublime Security	6mo ago Apr 27th, 2026	Credential Phishing Free subdomain host HTML smuggling Impersonation: Brand Social engineering Archive analysis Content analysis File analysis Header analysis Javascript analysis Sender analysis URL analysis
Attachment: HTML smuggling with atob and high entropy	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Malware/Ransomware HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis Sender analysis URL analysis
Attachment: HTML smuggling with auto-downloaded file	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis Sender analysis URL analysis
Attachment: HTML smuggling with base64 encoded JavaScript function	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis
Attachment: HTML smuggling with base64 encoded ZIP file	Sublime Security	11mo ago Nov 20th, 2025	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis
Attachment: HTML smuggling with concatenation obfuscation	@vector_sec	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis
Attachment: HTML smuggling with decimal encoding	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis
Attachment: HTML smuggling with embedded base64-encoded ISO	Sublime Security	3y ago Aug 21st, 2023	Credential Phishing Malware/Ransomware Evasion HTML smuggling ISO Archive analysis Content analysis File analysis HTML analysis Sender analysis
Attachment: HTML smuggling with embedded base64 streamed file download	Sublime Security	3y ago Aug 21st, 2023	Malware/Ransomware HTML smuggling Scripting Social engineering Archive analysis Content analysis File analysis HTML analysis
Attachment: HTML smuggling with eval and atob	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis
Attachment: HTML smuggling with excessive line break obfuscation	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Encryption Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis
Attachment: HTML smuggling with fromCharCode and other signals	Sublime Security	3y ago Aug 21st, 2023	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis Javascript analysis HTML analysis
Attachment: HTML smuggling with hex strings	@ajpc500	3y ago Aug 21st, 2023	Credential Phishing Malware/Ransomware Evasion HTML smuggling Archive analysis Content analysis File analysis HTML analysis Javascript analysis
Attachment: HTML smuggling with high entropy and other signals	Sublime Security	3y ago Aug 21st, 2023	Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis
Attachment: HTML smuggling with raw array buffer	Sublime Security	3y ago Aug 21st, 2023	Credential Phishing Malware/Ransomware Evasion Free subdomain host HTML smuggling Archive analysis Content analysis File analysis Javascript analysis
Attachment: HTML smuggling with RC4 decryption	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Encryption Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis
Attachment: HTML smuggling with ROT13	@Kyle_Parrish_	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Encryption Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis Javascript analysis HTML analysis
Attachment: HTML smuggling with setTimeout	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Javascript analysis
Attachment: HTML with hidden body	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion Scripting Content analysis HTML analysis File analysis
Attachment: HTML with JavaScript functions for HTTP requests	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion Scripting Content analysis HTML analysis Javascript analysis File analysis
Attachment: ICS calendar file with base64 encoded recipient address in URL parameters	Sublime Security	5mo ago May 12th, 2026	Credential Phishing Evasion Social engineering ICS Phishing File analysis URL analysis Content analysis
Attachment: ICS calendar file with legal language	Sublime Security	27d ago Sep 28th, 2026	BEC/Fraud Social engineering Evasion ICS Phishing File analysis Content analysis URL analysis
Attachment: ICS calendar file with QR code containing recipient email address	Sublime Security	1mo ago Sep 22nd, 2026	Credential Phishing QR code Social engineering Evasion File analysis QR code analysis URL analysis Content analysis
Attachment: ICS calendar file with real estate fraud link	Sublime Security	1mo ago Sep 18th, 2026	BEC/Fraud Social engineering Evasion File analysis Content analysis URL analysis
Attachment: ICS calendar file with recipient address in UID field	Sublime Security	1mo ago Sep 4th, 2026	Credential Phishing Social engineering File analysis Content analysis
Attachment: ICS calendar file with suspicious product identifier	Sublime Security	2mo ago Jul 27th, 2026	Credential Phishing Evasion Social engineering ICS Phishing File analysis Content analysis
Attachment: ICS calendar file with suspicious UID domain	Sublime Security	26d ago Sep 29th, 2026	Credential Phishing BEC/Fraud Social engineering ICS Phishing File analysis Content analysis
Attachment: ICS calendar invite hiding credential theft	Sublime Security	27d ago Sep 28th, 2026	Credential Phishing Social engineering Evasion ICS Phishing File analysis Content analysis Natural Language Understanding Header analysis Sender analysis
Attachment: ICS calendar invite with BEC intent	Sublime Security	27d ago Sep 28th, 2026	BEC/Fraud Social engineering Content analysis Natural Language Understanding File analysis Header analysis
Attachment: ICS calendar invite with bid/RFP lure and suspicious link	Sublime Security	11d ago Oct 14th, 2026	BEC/Fraud Social engineering Free file host Free subdomain host Lookalike domain ICS Phishing File analysis Content analysis URL analysis Whois
Attachment: ICS calendar invite with financial lure and suspicious link	Sublime Security	1mo ago Aug 31st, 2026	Credential Phishing BEC/Fraud Social engineering Evasion File analysis Content analysis URL analysis Whois Header analysis
Attachment: ICS calendar invite with Google share.google URL shortener in google.<tld>/share.google path form	Sublime Security	27d ago Sep 28th, 2026	Spam Credential Phishing Open redirect Social engineering URL analysis Content analysis File analysis
Attachment: ICS calendar invite with photo/file share lure	Sublime Security	1mo ago Sep 9th, 2026	Credential Phishing Free email provider Social engineering Open redirect Image as content File analysis Natural Language Understanding Content analysis URL analysis Sender analysis Header analysis
Attachment: ICS calendar with suspicious link Leading to minimal JS landing page	Sublime Security	27d ago Sep 28th, 2026	Credential Phishing Free file host Free subdomain host Evasion Scripting Social engineering ICS Phishing File analysis URL analysis Whois Javascript analysis Content analysis
Attachment: ICS file with AWS Lambda URL	Sublime Security	3mo ago Jul 16th, 2026	Credential Phishing Malware/Ransomware Evasion Free file host ICS Phishing Content analysis File analysis URL analysis
Attachment: ICS file with excessive custom properties	Sublime Security	1mo ago Sep 4th, 2026	Malware/Ransomware Evasion ICS Phishing File analysis Content analysis
Attachment: ICS file with non-Gregorian calendar scale	Sublime Security	5mo ago Apr 28th, 2026	Credential Phishing Evasion ICS Phishing File analysis Content analysis
Attachment: ICS invite meeting lure	Sublime Security	27d ago Sep 28th, 2026	Credential Phishing Social engineering Impersonation: Brand Spoofing Open redirect ICS Phishing Content analysis URL analysis Header analysis Sender analysis File analysis
Attachment: ICS voicemail lure with suspicious link	Sublime Security	11d ago Oct 14th, 2026	Credential Phishing Social engineering Free file host Evasion ICS Phishing File analysis Content analysis URL analysis Whois Header analysis
Attachment: ICS with employee policy review lure	Sublime Security	5mo ago Apr 28th, 2026	Credential Phishing BEC/Fraud Evasion ICS Phishing Social engineering File analysis Content analysis
Attachment: ICS with Suspicious Office 365 app authorization (OAuth) link	Sublime Security	11d ago Oct 14th, 2026	Credential Phishing Evasion Social engineering ICS Phishing File analysis Content analysis URL analysis
Attachment: Identity Confirmation With Document Unlock Code	Sublime Security	2mo ago Jul 28th, 2026	Credential Phishing Social engineering Encryption PDF Content analysis
Attachment: Image-only docx/pptx callback phishing	Sublime Security	27d ago Sep 28th, 2026	Callback Phishing Image as content Impersonation: Brand Social engineering File analysis Optical Character Recognition Content analysis
Attachment: Invoice and W-9 PDFs with suspicious creators	Sublime Security	2mo ago Aug 25th, 2026	BEC/Fraud PDF Social engineering Impersonation: Brand File analysis Optical Character Recognition Exif analysis Content analysis
Attachment: Legal themed message or PDF with suspicious indicators	Sublime Security	1mo ago Sep 15th, 2026	Credential Phishing Extortion BEC/Fraud Evasion PDF Social engineering Content analysis File analysis Natural Language Understanding Optical Character Recognition URL analysis Whois Header analysis Exif analysis
Attachment: Link to Doubleclick.net open redirect	Sublime Security	5mo ago Apr 29th, 2026	BEC/Fraud Credential Phishing Evasion Open redirect Social engineering Content analysis File analysis URL analysis
Attachment: LNK with embedded content	@ajpc500	9mo ago Jan 12th, 2026	Malware/Ransomware Exploit LNK Scripting Content analysis Exif analysis File analysis
Attachment: Macro with suspected use of COM ShellBrowserWindow object for process creation	@ajpc500	9mo ago Jan 12th, 2026	Malware/Ransomware Macros Scripting Content analysis File analysis Macro analysis
Attachment: Malicious mobileconfig profile	Sublime Security	26d ago Sep 29th, 2026	Credential Phishing Social engineering File analysis Content analysis Threat intelligence

731 Rules

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