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
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	6mo 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	6mo 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	6mo 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_	6mo 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	6mo 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	6mo ago Jan 12th, 2026	Credential Phishing Evasion Scripting Content analysis HTML analysis File analysis
Attachment: HTML with JavaScript functions for HTTP requests	Sublime Security	11mo 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	2mo 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	3mo 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	3mo ago Apr 20th, 2026	Credential Phishing Social engineering File analysis Content analysis
Attachment: ICS calendar file with suspicious product identifier	Sublime Security	1mo ago May 29th, 2026	Credential Phishing Evasion Social engineering ICS Phishing File analysis Content analysis
Attachment: ICS calendar file with suspicious UID domain	Sublime Security	24d ago Jul 2nd, 2026	ICS Phishing Credential Phishing BEC/Fraud Social engineering File analysis Content analysis
Attachment: ICS file with AWS Lambda URL	Sublime Security	10d 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 Jun 2nd, 2026	Malware/Ransomware Evasion ICS Phishing File analysis Content analysis
Attachment: ICS file with non-Gregorian calendar scale	Sublime Security	2mo ago Apr 28th, 2026	Credential Phishing Evasion ICS Phishing File analysis Content analysis
Attachment: ICS with employee policy review lure	Sublime Security	2mo ago Apr 28th, 2026	Credential Phishing BEC/Fraud Evasion ICS Phishing Social engineering File analysis Content analysis
Attachment: Invoice and W-9 PDFs with suspicious creators	Sublime Security	30d ago Jun 26th, 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	3mo 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	2mo 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	6mo 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	6mo ago Jan 12th, 2026	Malware/Ransomware Macros Scripting Content analysis File analysis Macro analysis
Attachment: Malicious OneNote commands	@Kyle_Parrish_	6mo ago Jan 12th, 2026	Malware/Ransomware OneNote Scripting Archive analysis Content analysis File analysis YARA
Attachment: Malicious zip file matching zipline campaign	Sublime Security	1mo ago Jun 25th, 2026	Malware/Ransomware LNK Archive analysis YARA Content analysis Threat intelligence
Attachment: Microsoft 365 credential phishing	Sublime Security	1mo ago Jun 5th, 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	1mo 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	6mo 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	6mo 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	5mo 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	8mo 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	6mo 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	4mo 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	1mo ago Jun 16th, 2026	BEC/Fraud PDF Social engineering File analysis Content analysis
Attachment: PDF with a suspicious string and single URL	Sublime Security	1mo ago Jun 17th, 2026	Credential Phishing PDF Social engineering Evasion Content analysis File analysis URL analysis Exif analysis
Attachment: PDF with credential theft language and invalid reply-to domain	Sublime Security	3mo ago Apr 10th, 2026	Credential Phishing PDF Social engineering Spoofing File analysis Header analysis Natural Language Understanding Content analysis
Attachment: PDF with fake invoice using suspicious font sizing	Sublime Security	1mo ago Jun 9th, 2026	BEC/Fraud Callback Phishing PDF Social engineering File analysis YARA Content analysis
Attachment: PDF with link to DMG file download	Sublime Security	6mo ago Jan 12th, 2026	Malware/Ransomware Evasion PDF Archive analysis Content analysis File analysis URL analysis
Attachment: PDF with link to zip containing a wsf file	Sublime Security	6mo ago Jan 12th, 2026	Malware/Ransomware Evasion PDF Archive analysis Content analysis File analysis URL analysis
Attachment: PDF with Microsoft Purview message impersonation	Sublime Security	8mo ago Nov 10th, 2025	Credential Phishing Impersonation: Brand PDF Social engineering File analysis Natural Language Understanding Content analysis
Attachment: PDF with password in filename matching body text	Sublime Security	5mo ago Feb 19th, 2026	Malware/Ransomware Credential Phishing Encryption Evasion PDF Content analysis File analysis
Attachment: PDF with personal Microsoft OneNote URL	Sublime Security	7mo ago Dec 4th, 2025	Credential Phishing PDF Social engineering File analysis Content analysis
Attachment: PDF with QR code containing recipient-specific credential theft content	Sublime Security	1mo ago Jun 10th, 2026	Credential Phishing PDF QR code Social engineering File analysis Natural Language Understanding QR code analysis Content analysis
Attachment: PDF with secure document acknowledgment prompt	Sublime Security	9d ago Jul 17th, 2026	Credential Phishing Evasion PDF Social engineering Image as content Impersonation: Brand Content analysis File analysis YARA
Attachment: PDF with suspicious document view lure	Sublime Security	12d ago Jul 14th, 2026	Malware/Ransomware PDF Social engineering Content analysis File analysis YARA
Attachment: PDF with suspicious internal object reference identifier	Sublime Security	27d ago Jun 29th, 2026	BEC/Fraud PDF Content analysis File analysis

620 Rules

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