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: EML with suspicious indicators	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis File analysis
Attachment: Emotet heavily padded doc in zip file	Sublime Security	1y ago Jul 16th, 2025	Malware/Ransomware Evasion Archive analysis Content analysis Exif analysis File analysis Sender analysis
Attachment: Employment contract update with suspicious file naming	Sublime Security	8mo ago Jan 28th, 2026	Malware/Ransomware Evasion Social engineering Content analysis File analysis
Attachment: Encrypted Microsoft Office file (unsolicited)	Sublime Security	9mo ago Jan 12th, 2026	Malware/Ransomware Encryption Macros Scripting Archive analysis File analysis OLE analysis Sender analysis
Attachment: Encrypted PDF With Credential Harvesting Indicators	Sublime Security	4mo ago Jun 5th, 2026	Credential Phishing Encryption Evasion PDF File analysis YARA
Attachment: Encrypted PDF with credential phishing link	Sublime Security	17d ago Oct 8th, 2026	Credential Phishing PDF Encryption Evasion Social engineering File analysis Content analysis Whois URL analysis Natural Language Understanding
Attachment: Encrypted PDF with credential theft body	Sublime Security	17d ago Oct 8th, 2026	Credential Phishing Encryption Evasion PDF Social engineering Content analysis Exif analysis File analysis Natural Language Understanding Sender analysis
Attachment: Encrypted PDF with credential theft language in EML	Sublime Security	1mo ago Sep 4th, 2026	Credential Phishing Encryption Evasion PDF Social engineering Content analysis Exif analysis File analysis Natural Language Understanding Sender analysis
Attachment: Encrypted ZIP containing VHDX file	Sublime Security	6mo ago Apr 3rd, 2026	Malware/Ransomware Encryption Evasion Archive analysis File analysis
Attachment: Encrypted zip file with payment-related lure	Sublime Security	11mo ago Nov 25th, 2025	BEC/Fraud Malware/Ransomware Encryption Evasion Social engineering Archive analysis Content analysis File analysis
Attachment: Excel file with document sharing lure created by Go Excelize	Sublime Security	8mo ago Jan 29th, 2026	Credential Phishing Macros Social engineering File analysis Macro analysis Content analysis Exif analysis
Attachment: Excel file with hyperlinks to suspicious domains	Sublime Security	19d ago Oct 6th, 2026	BEC/Fraud Credential Phishing Free file host Free subdomain host Social engineering Natural Language Understanding Content analysis Exif analysis File analysis URL analysis
Attachment: Excel file with suspicious template identifier	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Evasion Macros Exif analysis File analysis
Attachment: Excel Web Query File (IQY)	@jkcoote	3y ago Aug 21st, 2023	Credential Phishing Malware/Ransomware Evasion Archive analysis File analysis
Attachment: Fake attachment image lure	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Malware/Ransomware Evasion Image as content Social engineering File analysis Natural Language Understanding Optical Character Recognition
Attachment: Fake lawyer & sports agent identities	Sublime Security	9mo ago Jan 26th, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Exif analysis File analysis Optical Character Recognition
Attachment: Fake LinkedIn invoice PDF lure	Sublime Security	2d ago Oct 23rd, 2026	BEC/Fraud Credential Phishing Impersonation: Brand PDF Social engineering YARA File analysis
Attachment: Fake mobileconfig security update profile	Sublime Security	30d ago Sep 25th, 2026	Credential Phishing Impersonation: Brand Social engineering Evasion File analysis Content analysis XML analysis
Attachment: Fake PDF Invoices Yara	Sublime Security	4mo ago Jun 16th, 2026	Malware/Ransomware Credential Phishing PDF Social engineering Content analysis File analysis YARA
Attachment: Fake research internship offer	Sublime Security	1mo ago Sep 1st, 2026	BEC/Fraud Spam PDF Social engineering Out of band pivot Free email provider Optical Character Recognition Content analysis File analysis
Attachment: Fake scan-to-email	Sublime Security	1y ago Sep 22nd, 2025	Credential Phishing Free file host Image as content PDF Social engineering Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Attachment: Fake secure message and suspicious indicators	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Image as content Impersonation: Brand Social engineering Content analysis File analysis Header analysis Natural Language Understanding 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 voicemail via PDF	Sublime Security	5mo ago Apr 30th, 2026	Credential Phishing PDF QR code Social engineering Computer Vision Content analysis File analysis Optical Character Recognition QR code analysis 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: Fictitious invoice using LinkedIn's address	Sublime Security	16d ago Oct 9th, 2026	BEC/Fraud PDF Social engineering File analysis Optical Character Recognition Natural Language Understanding Content analysis Exif analysis
Attachment: File execution via Javascript	Sublime Security	6mo ago Apr 27th, 2026	Malware/Ransomware Evasion Scripting Archive analysis File analysis Javascript analysis Sender analysis
Attachment: Filename containing Unicode braille pattern blank character	@vector_sec	1y ago Aug 5th, 2025	Malware/Ransomware Evasion Archive analysis File analysis
Attachment: Filename containing Unicode right-to-left override character	@vector_sec	9mo ago Jan 12th, 2026	Malware/Ransomware Evasion Archive analysis File analysis
Attachment: Finance themed PDF with observed phishing template	Sublime Security	7mo ago Mar 2nd, 2026	Credential Phishing PDF Evasion File analysis Content analysis
Attachment: GCPay blurred check PDF	Sublime Security	5d ago Oct 20th, 2026	BEC/Fraud PDF Social engineering Image as content File analysis YARA
Attachment: 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: GZ archive with credential theft content	Sublime Security	1mo ago Sep 2nd, 2026	Credential Phishing Evasion Archive analysis File analysis YARA Natural Language Understanding HTML analysis URL analysis
Attachment: Gzip-archived with nested HTML file containing image and button link	Sublime Security	1mo ago Sep 3rd, 2026	Credential Phishing HTML smuggling Image as content Evasion Archive analysis YARA HTML analysis URL analysis File analysis
Attachment: Hex-encoded recipient email in URL fragment	Sublime Security	1mo ago Sep 16th, 2026	Credential Phishing BEC/Fraud Social engineering Evasion PDF File analysis URL analysis Content analysis
Attachment: HTML attachment with Javascript location	@vector_sec	1y 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	1mo ago Sep 23rd, 2026	Credential Phishing HTML smuggling Scripting Archive analysis File analysis HTML analysis Javascript analysis Sender analysis
Attachment: HTML file contains exclusively Javascript	Sublime Security	9mo 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	11mo ago Nov 3rd, 2025	Malware/Ransomware Credential Phishing HTML smuggling Scripting Evasion HTML analysis File analysis Content analysis
Attachment: HTML file with excessive padding and suspicious patterns	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling File analysis HTML analysis YARA
Attachment: HTML file with reference to recipient and suspicious patterns	Sublime Security	9mo 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	9mo 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	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 atob and high entropy via calendar invite	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Malware/Ransomware Evasion HTML smuggling ICS Phishing Scripting File analysis HTML analysis Javascript analysis Sender 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

376 Rules

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