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 Sep 9th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Attachment: HTML smuggling with decimal encoding	Sublime Security	8mo ago Jan 12th, 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	8mo 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	8mo 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	8mo 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_	8mo 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	8mo 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	8mo ago Jan 12th, 2026	Credential Phishing Evasion Scripting Content analysis HTML analysis File analysis
Attachment: HTML with JavaScript functions for HTTP requests	Sublime Security	1y ago Aug 5th, 2025	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	4mo ago May 12th, 2026	Credential Phishing Evasion Social engineering ICS Phishing File analysis URL analysis Content analysis
Attachment: ICS calendar file with QR code containing recipient email address	Sublime Security	4mo ago Apr 20th, 2026	Credential Phishing QR code Social engineering Evasion File analysis QR code analysis URL analysis Content analysis
Attachment: ICS calendar file with recipient address in UID field	Sublime Security	6d ago Sep 4th, 2026	Credential Phishing Social engineering File analysis Content analysis
Attachment: ICS calendar file with suspicious product identifier	Sublime Security	1mo 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	6d ago Sep 4th, 2026	ICS Phishing Credential Phishing BEC/Fraud Social engineering File analysis Content analysis
Attachment: ICS calendar invite with bid/RFP lure and suspicious link	Sublime Security	2d ago Sep 8th, 2026	BEC/Fraud ICS Phishing Social engineering Free file host Free subdomain host Lookalike domain File analysis Content analysis URL analysis Whois
Attachment: ICS calendar invite with financial lure and suspicious link	Sublime Security	10d 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 photo/file share lure	Sublime Security	6h 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 file with AWS Lambda URL	Sublime Security	1mo 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	6d ago Sep 4th, 2026	Malware/Ransomware Evasion ICS Phishing File analysis Content analysis
Attachment: ICS file with non-Gregorian calendar scale	Sublime Security	4mo ago Apr 28th, 2026	Credential Phishing Evasion ICS Phishing File analysis Content analysis
Attachment: ICS invite meeting lure	Sublime Security	14d ago Aug 27th, 2026	ICS Phishing Credential Phishing Social engineering Impersonation: Brand Spoofing Open redirect Content analysis URL analysis Header analysis Sender analysis File analysis
Attachment: ICS voicemail lure with suspicious link	Sublime Security	6h ago Sep 9th, 2026	ICS Phishing Credential Phishing Social engineering Free file host Evasion File analysis Content analysis URL analysis Whois Header analysis
Attachment: ICS with employee policy review lure	Sublime Security	4mo ago Apr 28th, 2026	Credential Phishing BEC/Fraud Evasion ICS Phishing Social engineering File analysis Content analysis
Attachment: Identity Confirmation With Document Unlock Code	Sublime Security	1mo ago Jul 28th, 2026	Credential Phishing Social engineering Encryption PDF Content analysis
Attachment: Image-only docx/pptx callback phishing	Sublime Security	20d ago Aug 21st, 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	16d 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	5mo ago Apr 3rd, 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	4mo 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	8mo 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	8mo ago Jan 12th, 2026	Malware/Ransomware Macros Scripting Content analysis File analysis Macro analysis
Attachment: Malicious OneNote commands	@Kyle_Parrish_	8mo ago Jan 12th, 2026	Malware/Ransomware OneNote Scripting Archive analysis Content analysis File analysis YARA
Attachment: Malicious zip file matching zipline campaign	Sublime Security	2mo ago Jun 25th, 2026	Malware/Ransomware LNK Archive analysis YARA Content analysis Threat intelligence
Attachment: Microsoft 365 credential phishing	Sublime Security	1mo ago Jul 27th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Header analysis Optical Character Recognition Sender analysis
Attachment: Microsoft OAuth credential harvesting via EML with embedded malicious links	Sublime Security	3mo ago Jun 1st, 2026	Credential Phishing Impersonation: Brand Evasion PDF File analysis URL analysis Content analysis
Attachment: Office document with VSTO add-in	@vector_sec	8mo ago Jan 12th, 2026	Malware/Ransomware Scripting Archive analysis Content analysis Exif analysis File analysis Sender analysis URL analysis
Attachment: Office file with credential phishing URLs	Sublime Security	8mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering File analysis URL analysis Archive analysis Content analysis
Attachment: Office file with document sharing and browser instruction lures	Sublime Security	7mo ago Jan 29th, 2026	Credential Phishing Social engineering Evasion Archive analysis File analysis Macro analysis Optical Character Recognition Content analysis
Attachment: OLE external relationship containing file scheme link to executable filetype	Sublime Security	9mo ago Nov 24th, 2025	Malware/Ransomware Evasion Archive analysis Content analysis OLE analysis Sender analysis
Attachment: OLE external relationship containing file scheme link to IP address	Sublime Security	8mo ago Jan 12th, 2026	Malware/Ransomware Evasion Archive analysis Content analysis OLE analysis Sender analysis
Attachment: PDF bid/proposal lure with credential theft indicators	Sublime Security	5mo ago Mar 27th, 2026	BEC/Fraud Credential Phishing PDF Social engineering Free file host Free subdomain host File analysis Content analysis Optical Character Recognition Natural Language Understanding URL analysis Exif analysis
Attachment: PDF file with recipient domain and ATT eCheckRun pattern	Sublime Security	2mo ago Jun 16th, 2026	BEC/Fraud PDF Social engineering File analysis Content analysis
Attachment: PDF Grant Payment lure with embedded link	Sublime Security	15d ago Aug 26th, 2026	Credential Phishing PDF Social engineering File analysis URL analysis Content analysis
Attachment: PDF with a suspicious string and single URL	Sublime Security	22d ago Aug 19th, 2026	Credential Phishing PDF Social engineering Evasion Content analysis File analysis URL analysis Exif analysis
Attachment: PDF with bolded passcode	Sublime Security	2d ago Sep 8th, 2026	Credential Phishing PDF Evasion Social engineering HTML analysis Content analysis File analysis
Attachment: PDF with credential theft language and invalid reply-to domain	Sublime Security	5mo ago Apr 10th, 2026	Credential Phishing PDF Social engineering Spoofing File analysis Header analysis Natural Language Understanding Content analysis

675 Rules

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