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 May 23rd, 2025

Feed Source

GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Advance Fee Fraud (AFF) from freemail provider or suspicious TLD	Sublime Security	1mo ago Apr 11th, 2025	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/advance-fee-fraud-aff-from-freemail-provider-or-suspicious-tld-6a5af373
Attachment: Archive containing HTML file with file scheme link	Sublime Security	1y ago Mar 7th, 2024	Credential Phishing Evasion Exploit HTML smuggling Social engineering Archive analysis File analysis HTML analysis	/feeds/core/detection-rules/attachment-archive-containing-html-file-with-file-scheme-link-edf6d0d9
Attachment: Callback Phishing solicitation via image file	@vector_sec	2mo ago Mar 12th, 2025	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	/feeds/core/detection-rules/attachment-callback-phishing-solicitation-via-image-file-60acbb36
Attachment: Callback Phishing solicitation via pdf file	Sublime Security	1mo ago Mar 27th, 2025	Callback Phishing Evasion Free email provider Out of band pivot PDF Social engineering Exif analysis File analysis Optical Character Recognition Sender analysis	/feeds/core/detection-rules/attachment-callback-phishing-solicitation-via-pdf-file-ac33f097
Attachment: Callback Phishing solicitation via text-based file with a large unknown recipient list	Sublime Security	10mo ago Jul 26th, 2024	Callback Phishing Evasion Out of band pivot Social engineering Content analysis File analysis Header analysis Sender analysis	/feeds/core/detection-rules/attachment-callback-phishing-solicitation-via-text-based-file-with-a-large-unknown-recipient-list-ca39c83a
Attachment: DocuSign Impersonation (PDF) linking to New Domain <=3d	Sublime Security	1y ago Apr 25th, 2024	Credential Phishing Impersonation: Brand PDF Social engineering Header analysis Sender analysis URL analysis File analysis Computer Vision Whois	/feeds/core/detection-rules/attachment-docusign-impersonation-pdf-linking-to-new-domain-less3d-f0c96282
Attachment: Dropbox image lure with no Dropbox domains in links	Sublime Security	1y ago Jan 23rd, 2024	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Header analysis Optical Character Recognition Sender analysis	/feeds/core/detection-rules/attachment-dropbox-image-lure-with-no-dropbox-domains-in-links-500eee2d
Attachment: EML containing a base64 encoded script	Sublime Security	1y ago Jan 30th, 2024	Credential Phishing Evasion HTML smuggling Scripting Social engineering File analysis HTML analysis Sender analysis	/feeds/core/detection-rules/attachment-eml-containing-a-base64-encoded-script-fc3d9445
Attachment: EML with link to credential phishing page	Sublime Security	8mo ago Sep 13th, 2024	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	/feeds/core/detection-rules/attachment-eml-with-link-to-credential-phishing-page-1df41cca
Attachment: EML with Suspicious Indicators	Sublime Security	1mo ago Apr 18th, 2025	Credential Phishing Evasion HTML smuggling Social engineering Content analysis File analysis	/feeds/core/detection-rules/attachment-eml-with-suspicious-indicators-deb5d08d
Attachment: Encrypted PDF With Credential Theft Body	Sublime Security	7mo ago Oct 10th, 2024	Credential Phishing Encryption Evasion PDF Social engineering Content analysis Exif analysis File analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/attachment-encrypted-pdf-with-credential-theft-body-c9596c9a
Attachment: Fake attachment image lure	Sublime Security	1mo ago Apr 11th, 2025	Credential Phishing Malware/Ransomware Evasion Image as content Social engineering File analysis Natural Language Understanding Optical Character Recognition	/feeds/core/detection-rules/attachment-fake-attachment-image-lure-96b8b285
Attachment: Fake scan-to-email	Sublime Security	6mo ago Oct 28th, 2024	Credential Phishing Free file host Image as content PDF Social engineering Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/attachment-fake-scan-to-email-ea850cc1
Attachment: Fake secure message and suspicious indicators	Sublime Security	8mo ago Sep 16th, 2024	Credential Phishing Image as content Impersonation: Brand Social engineering Content analysis File analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/attachment-fake-secure-message-and-suspicious-indicators-20a34d94
Attachment: Fake Slack installer	Sublime Security	2y 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	/feeds/core/detection-rules/attachment-fake-slack-installer-cded2d2f
Attachment: Fake Voicemail via PDF	Sublime Security	23d ago Apr 30th, 2025	Credential Phishing PDF QR code Social engineering Computer Vision Content analysis File analysis Optical Character Recognition QR code analysis URL analysis	/feeds/core/detection-rules/attachment-fake-voicemail-via-pdf-d3587209
Attachment: Fake Zoom installer	Sublime Security	2y 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	/feeds/core/detection-rules/attachment-fake-zoom-installer-840a12a6
Attachment: HTML Smuggling Microsoft Sign In	Sublime Security	1y ago Jan 31st, 2024	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	/feeds/core/detection-rules/attachment-html-smuggling-microsoft-sign-in-878d6385
Attachment: HTML smuggling with embedded base64 streamed file download	Sublime Security	2y ago Aug 21st, 2023	Malware/Ransomware HTML smuggling Scripting Social engineering Archive analysis Content analysis File analysis HTML analysis	/feeds/core/detection-rules/attachment-html-smuggling-with-embedded-base64-streamed-file-download-e04de4e2
Attachment: HTML smuggling with excessive string concatenation and suspicious patterns	Sublime Security	8mo ago Aug 27th, 2024	Credential Phishing Evasion HTML smuggling Scripting Social engineering File analysis HTML analysis Javascript analysis	/feeds/core/detection-rules/attachment-html-smuggling-with-excessive-string-concatenation-and-suspicious-patterns-e34fce8d
Attachment: HTML With Emoji-to-Character Map	Sublime Security	5mo ago Dec 2nd, 2024	Credential Phishing Evasion HTML smuggling Impersonation: Brand Scripting Social engineering File analysis HTML analysis Javascript analysis Sender analysis	/feeds/core/detection-rules/attachment-html-with-emoji-to-character-map-3119d086
Attachment: Link to Doubleclick.net Open Redirect	Sublime Security	7mo ago Oct 24th, 2024	BEC/Fraud Credential Phishing Evasion Open redirect Social engineering Content analysis File analysis URL analysis	/feeds/core/detection-rules/attachment-link-to-doubleclicknet-open-redirect-506c16cc
Attachment: Microsoft 365 Credential Phishing	Sublime Security	7mo ago Oct 16th, 2024	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Header analysis Optical Character Recognition Sender analysis	/feeds/core/detection-rules/attachment-microsoft-365-credential-phishing-edce0229
Attachment: Microsoft impersonation via PDF with link and suspicious language	Sublime Security	1y ago May 2nd, 2024	Credential Phishing Malware/Ransomware Image as content Impersonation: Brand PDF Scripting Social engineering Computer Vision File analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/attachment-microsoft-impersonation-via-pdf-with-link-and-suspicious-language-70d41c7f
Attachment: Office file contains OLE relationship to credential phishing page	Sublime Security	5mo ago Dec 18th, 2024	Credential Phishing Evasion Social engineering File analysis HTML analysis Natural Language Understanding OLE analysis URL analysis	/feeds/core/detection-rules/attachment-office-file-contains-ole-relationship-to-credential-phishing-page-d55793d0
Attachment: PDF file with Link to Fake Bitcoin Exchange	Sublime Security	2y ago Aug 21st, 2023	BEC/Fraud Free email provider Impersonation: Brand PDF Social engineering Exif analysis File analysis Sender analysis URL analysis	/feeds/core/detection-rules/attachment-pdf-file-with-link-to-fake-bitcoin-exchange-47601cb7
Attachment: PDF with credential theft language and link to a free subdomain (unsolicited)	Sublime Security	1y ago Jan 30th, 2024	Credential Phishing Free subdomain host PDF Social engineering File analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis	/feeds/core/detection-rules/attachment-pdf-with-credential-theft-language-and-link-to-a-free-subdomain-unsolicited-90f4ef4e
Attachment: QR Code Link With Base64-Encoded Recipient Address	Sublime Security	1mo ago Mar 27th, 2025	Credential Phishing QR code Image as content Social engineering Evasion PDF Macros Computer Vision File analysis Natural Language Understanding QR code analysis Sender analysis	/feeds/core/detection-rules/attachment-qr-code-link-with-base64-encoded-recipient-address-927a0c1a
Attachment: QR code with credential phishing indicators	Sublime Security	1mo ago Apr 14th, 2025	Credential Phishing QR code Social engineering Computer Vision Header analysis Natural Language Understanding QR code analysis Sender analysis URL analysis URL screenshot	/feeds/core/detection-rules/attachment-qr-code-with-credential-phishing-indicators-9f1681e1
Attachment: RFC822 containing suspicious file sharing language with links from untrusted sender	Sublime Security	1y ago Apr 3rd, 2024	Credential Phishing Evasion Social engineering File analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/attachment-rfc822-containing-suspicious-file-sharing-language-with-links-from-untrusted-sender-d96854d7
Attachment: RFP/RFQ impersonating government entities	Sublime Security	1y ago Jan 30th, 2024	BEC/Fraud Impersonation: Brand PDF Social engineering Content analysis File analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/attachment-rfprfq-impersonating-government-entities-3b73e3b3
Attachment: Small text file with link containing recipient email address	Sublime Security	7mo ago Oct 23rd, 2024	Credential Phishing Evasion Social engineering File analysis URL analysis	/feeds/core/detection-rules/attachment-small-text-file-with-link-containing-recipient-email-address-c0472c9d
Attachment: Suspicious Employee Policy Update Document Lure	Sublime Security	1mo ago Mar 31st, 2025	Credential Phishing PDF Social engineering Evasion Content analysis File analysis Sender analysis	/feeds/core/detection-rules/attachment-suspicious-employee-policy-update-document-lure-a8bf1fd1
Attachment with VBA macros from employee impersonation (unsolicited)	Sublime Security	1y ago Feb 26th, 2024	Malware/Ransomware Impersonation: Employee Macros Social engineering Archive analysis File analysis Macro analysis Sender analysis	/feeds/core/detection-rules/attachment-with-vba-macros-from-employee-impersonation-unsolicited-9b262123
BEC: Employee impersonation with subject manipulation	Sublime Security	1y ago Jan 22nd, 2024	BEC/Fraud Impersonation: Employee Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/bec-employee-impersonation-with-subject-manipulation-9adfc77b
BEC/Fraud: Generic Scam attempt to Undisclosed Receipients	Sublime Security	1y ago Apr 23rd, 2024	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/becfraud-generic-scam-attempt-to-undisclosed-receipients-5dac401f
BEC/Fraud: Romance Scam	Sublime Security	2y ago Nov 23rd, 2023	BEC/Fraud Free email provider Social engineering Content analysis Header analysis	/feeds/core/detection-rules/becfraud-romance-scam-0243cdaa
BEC/Fraud - Student loan callback phishing	Sublime Security	7mo ago Oct 4th, 2024	BEC/Fraud Free email provider Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/becfraud-student-loan-callback-phishing-a71f82c3
BEC/Fraud: Urgent Language and Suspicious Sending/Infrastructure Patterns	Sublime Security	2mo ago Mar 10th, 2025	BEC/Fraud Callback Phishing Spam Impersonation: Brand Social engineering Free email provider Content analysis Header analysis Sender analysis Whois	/feeds/core/detection-rules/becfraud-urgent-language-and-suspicious-sendinginfrastructure-patterns-ba8a79e0
BEC with unusual Reply-to or Return-path mismatch	Sublime Security	8mo ago Aug 27th, 2024	BEC/Fraud Evasion Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/bec-with-unusual-reply-to-or-return-path-mismatch-83e5e2df
Benefits Enrollment Impersonation	Sublime Security	3mo ago Jan 30th, 2025	Credential Phishing Evasion Impersonation: Employee Out of band pivot Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/benefits-enrollment-impersonation-5a6eb5a8
Brand impersonation: Adobe with suspicious language and link	Sublime Security	8mo ago Sep 19th, 2024	Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/brand-impersonation-adobe-with-suspicious-language-and-link-32cc8bf1
Brand impersonation: ADP	Sublime Security	1y ago Jan 9th, 2024	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/brand-impersonation-adp-bb9cf46b
Brand Impersonation: AliExpress	Sublime Security	25d ago Apr 28th, 2025	Callback Phishing Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis URL analysis	/feeds/core/detection-rules/brand-impersonation-aliexpress-b14703d8
Brand impersonation: Amazon	Sublime Security	1mo ago Apr 18th, 2025	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/brand-impersonation-amazon-13fc967d
Brand impersonation: Amazon with suspicious attachment	Sublime Security	9d ago May 14th, 2025	Credential Phishing Impersonation: Brand Social engineering Computer Vision File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/brand-impersonation-amazon-with-suspicious-attachment-5751dcb9
Brand impersonation: American Express (AMEX)	Sublime Security	8mo ago Sep 12th, 2024	Credential Phishing Impersonation: Brand Lookalike domain Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/brand-impersonation-american-express-amex-992a9fa9
Brand impersonation: Apple	Sublime Security	2y ago Aug 21st, 2023	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/brand-impersonation-apple-0b17f2c2
Brand impersonation: Aramco	Sublime Security	7mo ago Oct 10th, 2024	BEC/Fraud Impersonation: Brand Lookalike domain Social engineering Content analysis Header analysis HTML analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/brand-impersonation-aramco-96e87699
Brand impersonation: Bank of America	Sublime Security	11mo ago Jun 14th, 2024	Credential Phishing Impersonation: Brand Lookalike domain Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/brand-impersonation-bank-of-america-d2fc6ea1