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

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Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
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 with emoji-to-character map	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion HTML smuggling Impersonation: Brand Scripting Social engineering File analysis HTML analysis Javascript analysis Sender 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 hex-encoded recipient in link	Sublime Security	27d ago Sep 28th, 2026	Credential Phishing Evasion Social engineering ICS Phishing File analysis URL 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 credential theft indicators	Sublime Security	27d ago Sep 28th, 2026	Credential Phishing Free file host Free subdomain host Social engineering ICS Phishing File analysis Natural Language Understanding URL analysis Whois
Attachment: ICS file with links to newly registered domains	Sublime Security	6mo ago Apr 20th, 2026	Credential Phishing Social engineering File analysis URL analysis Whois
Attachment: ICS file with meeting prefix	Sublime Security	5mo ago Apr 28th, 2026	BEC/Fraud Credential Phishing ICS Phishing Social engineering File analysis Header 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 link with valueless base64 query parameter	Sublime Security	27d ago Sep 28th, 2026	Credential Phishing Evasion Social engineering ICS Phishing File analysis URL analysis Header 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: Malicious mobileconfig profile	Sublime Security	26d ago Sep 29th, 2026	Credential Phishing Social engineering File analysis Content analysis Threat intelligence
Attachment: Meetergo booking link	Sublime Security	16d ago Oct 9th, 2026	BEC/Fraud Credential Phishing Social engineering Evasion File analysis URL analysis
Attachment: Microsoft 365 credential phishing	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Header analysis Optical Character Recognition Sender analysis
Attachment: Microsoft impersonation via PDF with link and suspicious language	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Malware/Ransomware Image as content Impersonation: Brand PDF Scripting Social engineering Computer Vision File analysis Header analysis Natural Language Understanding Sender analysis
Attachment: Microsoft SharePoint Impersonation via images in macro-enabled attachment	Sublime Security	3mo ago Jul 16th, 2026	Credential Phishing Impersonation: Brand Macros Image as content Social engineering File analysis Macro analysis Optical Character Recognition
Attachment: Mobileconfig profile with mismatched embedded email	Sublime Security	26d ago Sep 29th, 2026	Credential Phishing Evasion Social engineering File analysis Content analysis Sender analysis
Attachment: Office file contains OLE relationship to credential phishing page	Sublime Security	9mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering File analysis HTML analysis Natural Language Understanding OLE analysis URL analysis
Attachment: Office file with credential phishing URLs	Sublime Security	9mo 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	1mo ago Sep 18th, 2026	Credential Phishing Social engineering Evasion Archive analysis File analysis Macro analysis Optical Character Recognition Content analysis
Attachment: Oversized guest-list calendar invite with purchase order lure	Sublime Security	27d ago Sep 28th, 2026	BEC/Fraud Social engineering Impersonation: Brand ICS Phishing File analysis Content analysis Natural Language Understanding Sender analysis Header analysis
Attachment: Oversized guest-list calendar invite with voicemail lure	Sublime Security	27d ago Sep 28th, 2026	BEC/Fraud Social engineering Impersonation: Brand ICS Phishing File analysis Content analysis Natural Language Understanding Sender analysis Header analysis
Attachment: PDF Adobe lure	Sublime Security	16d ago Oct 9th, 2026	Credential Phishing PDF Social engineering YARA File analysis
Attachment: PDF bid/proposal lure with credential theft indicators	Sublime Security	7mo 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 blue OneDrive lure	Sublime Security	6d ago Oct 19th, 2026	Credential Phishing PDF Impersonation: Brand Social engineering YARA File analysis
Attachment: PDF contains W9 or invoice YARA signatures	Sublime Security	7mo ago Mar 18th, 2026	BEC/Fraud Credential Phishing PDF Social engineering File analysis YARA
Attachment: PDF credential phishing via wkhtmltopdf/Qt with suspicious link	Sublime Security	24d ago Oct 1st, 2026	Credential Phishing PDF Open redirect Social engineering Exif analysis Optical Character Recognition Natural Language Understanding URL analysis File analysis
Attachment: PDF document portal credential theft lure	Sublime Security	1mo ago Sep 18th, 2026	Credential Phishing PDF Social engineering File analysis Content analysis Natural Language Understanding Header analysis Sender analysis
Attachment: PDF file with link to fake Bitcoin exchange	Sublime Security	9mo ago Jan 12th, 2026	BEC/Fraud Free email provider Impersonation: Brand PDF Social engineering Exif analysis File analysis Sender analysis URL analysis
Attachment: PDF file with recipient domain and ATT eCheckRun pattern	Sublime Security	4mo ago Jun 16th, 2026	BEC/Fraud PDF Social engineering File analysis Content analysis
Attachment: PDF Grant Payment lure with embedded link	Sublime Security	1mo ago Aug 26th, 2026	Credential Phishing PDF Social engineering File analysis URL analysis Content analysis

850 Rules

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