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

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Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Attachment: Any .sap file (unsolicited)	Sublime Security	5mo ago Oct 27th, 2025	Malware/Ransomware Evasion Scripting File analysis Header analysis Sender analysis
Attachment: Archive contains DLL-loading macro	Sublime Security	3y ago Dec 28th, 2023	Malware/Ransomware Exploit LNK Macros Scripting Archive analysis File analysis Macro analysis YARA
Attachment: cmd file extension	Sublime Security	2mo ago Feb 9th, 2026	Malware/Ransomware Scripting Archive analysis File analysis
Attachment: .csproj with suspicious commands	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Evasion Scripting File analysis
Attachment: CVE-2021-40444 - MSHTML Remote Code Execution Vulnerability	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Exploit Macros Scripting Archive analysis Content analysis File analysis Macro analysis OLE analysis
Attachment: CVE-2025-24071 - Microsoft Windows File Explorer Spoofing Vulnerability	Sublime Security	1y ago Mar 21st, 2025	Credential Phishing Scripting Macros Exploit Archive analysis Content analysis File analysis
Attachment: Double base64-encoded zip file in HTML smuggling attachment	@ajpc500	8mo ago Aug 5th, 2025	Malware/Ransomware Credential Phishing Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis Sender analysis
Attachment: Embedded Javascript in SVG file	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Scripting Archive analysis File analysis Sender analysis XML analysis
Attachment: Embedded VBScript in MHT file (unsolicited)	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Evasion Scripting Archive analysis File analysis HTML analysis Sender analysis
Attachment: EML containing a base64 encoded script	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion HTML smuggling Scripting Social engineering File analysis HTML analysis Sender analysis
Attachment: EML with embedded Javascript in SVG file	Sublime Security	8mo ago Aug 8th, 2025	Credential Phishing Malware/Ransomware Scripting Evasion File analysis Javascript analysis Sender analysis
Attachment: Encrypted Microsoft Office file (unsolicited)	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Encryption Macros Scripting Archive analysis File analysis OLE analysis Sender analysis
Attachment: Fake Slack installer	Sublime Security	3y ago Nov 29th, 2023	Malware/Ransomware Evasion HTML smuggling Impersonation: Brand Scripting Social engineering Archive analysis Computer Vision File analysis HTML analysis Natural Language Understanding URL analysis
Attachment: Fake Zoom installer	Sublime Security	3y ago Nov 29th, 2023	Malware/Ransomware Evasion HTML smuggling Impersonation: Brand Scripting Social engineering Archive analysis Computer Vision File analysis HTML analysis Natural Language Understanding URL analysis
Attachment: File execution via Javascript	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Evasion Scripting Archive analysis File analysis Javascript analysis Sender analysis
Attachment: HTML attachment with Javascript location	@vector_sec	8mo ago Aug 5th, 2025	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis Javascript analysis HTML analysis
Attachment: HTML attachment with login portal indicators	@ajpc500	3mo ago Jan 12th, 2026	Credential Phishing HTML smuggling Scripting Archive analysis File analysis HTML analysis Javascript analysis Sender analysis
Attachment: HTML file contains exclusively Javascript	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis File analysis
Attachment: HTML file with excessive 'const' declarations and abnormally long timeouts	Sublime Security	5mo ago Nov 3rd, 2025	Malware/Ransomware Credential Phishing HTML smuggling Scripting Evasion HTML analysis File analysis Content analysis
Attachment: HTML file with reference to recipient and suspicious patterns	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing HTML smuggling Scripting Content analysis File analysis HTML analysis Javascript analysis YARA
Attachment: HTML smuggling 'body onload' linking to suspicious destination	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis URL analysis
Attachment: HTML smuggling 'body onload' with high entropy and suspicious text	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis Content analysis File analysis HTML analysis
Attachment: HTML smuggling with atob and high entropy	Sublime Security	3mo 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 atob and high entropy via calendar invite	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting File analysis HTML analysis Javascript analysis Sender analysis
Attachment: HTML smuggling with auto-downloaded file	Sublime Security	3mo 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	3mo 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	5mo 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	3mo 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	3mo 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 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	3mo 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 eval and atob via calendar invite	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting File analysis HTML analysis Javascript analysis
Attachment: HTML smuggling with excessive line break obfuscation	Sublime Security	3mo 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 excessive string concatenation and suspicious patterns	Sublime Security	2y ago Aug 27th, 2024	Credential Phishing Evasion HTML smuggling Scripting Social engineering 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 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 RC4 decryption	Sublime Security	3mo 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_	3mo 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	3mo 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 unescape	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling Scripting Archive analysis File analysis HTML analysis Javascript analysis
Attachment: HTML with emoji-to-character map	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Evasion HTML smuggling Impersonation: Brand Scripting Social engineering File analysis HTML analysis Javascript analysis Sender analysis
Attachment: HTML with hidden body	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Scripting Content analysis HTML analysis File analysis
Attachment: HTML with JavaScript functions for HTTP requests	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Evasion Scripting Content analysis HTML analysis Javascript analysis File analysis
Attachment: HTML with obfuscation and recipient's email in JavaScript strings	Sublime Security	7mo ago Sep 25th, 2025	Credential Phishing HTML smuggling Scripting Archive analysis File analysis HTML analysis Javascript analysis
Attachment: ICS with embedded Javascript in SVG file	Sublime Security	2mo ago Jan 29th, 2026	Credential Phishing Malware/Ransomware Scripting Evasion File analysis Javascript analysis Sender analysis
Attachment: JavaScript file with suspicious base64-encoded executable	Sublime Security	2y ago Apr 1st, 2024	Malware/Ransomware Evasion Scripting Archive analysis File analysis YARA
Attachment: LNK with embedded content	@ajpc500	3mo ago Jan 12th, 2026	Malware/Ransomware Exploit LNK Scripting Content analysis Exif analysis File analysis
Attachment: Macro files containing MHT content	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion Macros Scripting Archive analysis File analysis Macro analysis
Attachment: Macro with suspected use of COM ShellBrowserWindow object for process creation	@ajpc500	3mo ago Jan 12th, 2026	Malware/Ransomware Macros Scripting Content analysis File analysis Macro analysis
Attachment: Malicious OneNote commands	@Kyle_Parrish_	3mo ago Jan 12th, 2026	Malware/Ransomware OneNote Scripting Archive analysis Content analysis File analysis YARA

66 Rules

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