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 Jun 8th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Adobe branded PDF file linking to a password-protected file from untrusted sender	Sublime Security	1mo ago Apr 29th, 2026	Malware/Ransomware Encryption Evasion Impersonation: Brand PDF Archive analysis File analysis Natural Language Understanding Optical Character Recognition
Attachment: Adobe image lure in body or attachment with suspicious link	Sublime Security	3d ago Jun 5th, 2026	Credential Phishing Image as content Impersonation: Brand Content analysis Computer Vision Optical Character Recognition Sender analysis URL analysis
Attachment: Callback phishing solicitation via image file	@vector_sec	4mo ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Out of band pivot Social engineering Image as content Content analysis Optical Character Recognition Sender analysis URL analysis Computer Vision
Attachment: Callback phishing solicitation via pdf file	Sublime Security	3d ago Jun 5th, 2026	Callback Phishing Evasion Free email provider Out of band pivot PDF Social engineering Exif analysis File analysis Optical Character Recognition Sender analysis
Attachment: Compensation review lure with QR code	Sublime Security	1mo ago Apr 14th, 2026	Credential Phishing PDF QR code Social engineering File analysis Optical Character Recognition QR code analysis Natural Language Understanding Sender analysis Header analysis
Attachment: Compensation-themed DOCX with QR code credential theft	Sublime Security	10d ago May 29th, 2026	Credential Phishing QR code Social engineering Impersonation: Brand File analysis Optical Character Recognition QR code analysis Natural Language Understanding Exif analysis Content analysis
Attachment: Dropbox image lure with no Dropbox domains in links	Sublime Security	10mo ago Jul 16th, 2025	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Header analysis Optical Character Recognition Sender analysis
Attachment: EML with link to credential phishing page	Sublime Security	10mo ago Jul 16th, 2025	Credential Phishing Evasion Free file host Free subdomain host Social engineering Computer Vision Content analysis File analysis Header analysis HTML analysis Natural Language Understanding Optical Character Recognition URL analysis URL screenshot
Attachment: Fake attachment image lure	Sublime Security	3d ago Jun 5th, 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	4mo ago Jan 26th, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Exif analysis File analysis Optical Character Recognition
Attachment: Fake scan-to-email	Sublime Security	8mo 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 voicemail via PDF	Sublime Security	1mo 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: Fictitious invoice using LinkedIn's address	Sublime Security	9mo ago Sep 3rd, 2025	BEC/Fraud PDF Social engineering File analysis Optical Character Recognition Natural Language Understanding Content analysis Exif analysis
Attachment: Invoice and W-9 PDFs with suspicious creators	Sublime Security	4mo ago Jan 21st, 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	2mo 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: Microsoft 365 credential phishing	Sublime Security	3d ago Jun 5th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Header analysis Optical Character Recognition Sender analysis
Attachment: Office file with document sharing and browser instruction lures	Sublime Security	4mo ago Jan 29th, 2026	Credential Phishing Social engineering Evasion Archive analysis File analysis Macro analysis Optical Character Recognition Content analysis
Attachment: PDF bid/proposal lure with credential theft indicators	Sublime Security	2mo 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 proposal with credential theft indicators	Sublime Security	2mo ago Mar 17th, 2026	Credential Phishing PDF Social engineering Evasion File analysis Natural Language Understanding Optical Character Recognition URL analysis
Attachment: PDF with credential theft language and link to a free subdomain (unsolicited)	Sublime Security	4mo ago Jan 12th, 2026	Credential Phishing Free subdomain host PDF Social engineering File analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis
Attachment: PDF with suspicious language and redirect to suspicious file type	Sublime Security	4mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion PDF File analysis Natural Language Understanding Optical Character Recognition URL analysis
Attachment: RFP/RFQ impersonating government entities	Sublime Security	2y ago Jan 30th, 2024	BEC/Fraud Impersonation: Brand PDF Social engineering Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Attachment: Soda PDF producer with encryption themes	Sublime Security	10mo ago Aug 5th, 2025	Credential Phishing PDF Social engineering File analysis Optical Character Recognition
Attachment soliciting user to enable macros	Sublime Security	4mo ago Jan 12th, 2026	Malware/Ransomware Macros Archive analysis File analysis Macro analysis Optical Character Recognition Sender analysis
Attachment: Suspicious PDF created with headless browser	Sublime Security	1mo ago May 7th, 2026	Credential Phishing Evasion PDF Content analysis Exif analysis File analysis Optical Character Recognition
Attachment: USDA bid invitation impersonation	Sublime Security	10mo ago Aug 5th, 2025	BEC/Fraud Impersonation: Brand PDF Macros Social engineering Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: Adobe Acrobat Sign PDF phishing file format template	Sublime Security	7d ago Jun 1st, 2026	Credential Phishing Impersonation: Brand PDF Computer Vision Optical Character Recognition File analysis
Brand impersonation: Amazon Web Services (AWS)	Sublime Security	8mo ago Oct 10th, 2025	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Optical Character Recognition Sender analysis Natural Language Understanding
Brand impersonation: Amazon with suspicious attachment	Sublime Security	1mo ago Apr 14th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: DocuSign branded attachment lure with no DocuSign links	Sublime Security	7mo ago Oct 22nd, 2025	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL screenshot
Brand impersonation: DocuSign PDF attachment with suspicious link	Sublime Security	7mo ago Oct 22nd, 2025	Credential Phishing Impersonation: Brand PDF Social engineering File analysis Natural Language Understanding Optical Character Recognition URL analysis
Brand impersonation: Fake Fax	Sublime Security	1mo ago Apr 30th, 2026	Credential Phishing Impersonation: Brand Image as content Free file host Free subdomain host Social engineering Computer Vision Content analysis Optical Character Recognition Sender analysis URL analysis
Brand impersonation: Figma with malicious document access overlay	Sublime Security	12d ago May 27th, 2026	Credential Phishing Impersonation: Brand Social engineering Image as content Sender analysis HTML analysis URL screenshot Optical Character Recognition URL analysis
Brand impersonation: Google fake sign-in warning	Sublime Security	4mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision File analysis Optical Character Recognition Sender analysis URL analysis
Brand impersonation: Internal Revenue Service	Sublime Security	4mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: Microsoft quarantine release notification in image attachment	Sublime Security	10mo ago Jul 16th, 2025	Credential Phishing Free file host Impersonation: Brand Social engineering Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: Microsoft Teams	Sublime Security	2y ago Dec 3rd, 2024	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Optical Character Recognition Sender analysis
Brand impersonation: Microsoft with low reputation links	Sublime Security	3d ago Jun 5th, 2026	Credential Phishing Free file host Image as content Impersonation: Brand Social engineering Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis
Brand impersonation: SendGrid	Sublime Security	2mo ago Mar 12th, 2026	BEC/Fraud Credential Phishing Spam Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: SharePoint PDF attachment with credential theft language	Sublime Security	1mo ago May 4th, 2026	Credential Phishing Impersonation: Brand Social engineering PDF Evasion Computer Vision File analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis Header analysis Whois
Brand Impersonation: Shein	Sublime Security	7mo ago Oct 15th, 2025	Credential Phishing Spam Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: Square	Sublime Security	7mo ago Oct 16th, 2025	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: TikTok	Sublime Security	3mo ago Feb 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Brand impersonation: Toronto-Dominion Bank	Sublime Security	2mo ago Apr 3rd, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
Callback phishing: Branded invoice from sender/reply-to domain less than 30 days old	Sublime Security	7mo ago Oct 17th, 2025	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Header analysis Natural Language Understanding Optical Character Recognition Whois
Callback phishing in body or attachment (untrusted sender)	Sublime Security	2mo ago Mar 27th, 2026	Callback Phishing Out of band pivot Social engineering Content analysis File analysis Optical Character Recognition Natural Language Understanding Sender analysis
Callback phishing: Social Security Administration fraud	Sublime Security	4mo ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Out of band pivot PDF Social engineering Exif analysis File analysis Optical Character Recognition Sender analysis
Callback phishing via e-signature service	Sublime Security	4mo ago Jan 12th, 2026	Callback Phishing Free email provider Impersonation: Brand Social engineering Content analysis Computer Vision Header analysis Optical Character Recognition
Callback phishing via extensionless rfc822 attachment	Sublime Security	4mo ago Jan 12th, 2026	Callback Phishing Impersonation: Brand Social engineering File analysis Natural Language Understanding Optical Character Recognition Sender analysis
Callback phishing via Google Group abuse	Sublime Security	1mo ago May 4th, 2026	Callback Phishing Free email provider Impersonation: Brand Social engineering File analysis Natural Language Understanding Optical Character Recognition Sender analysis

77 Rules

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