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 Nov 12th, 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	9d ago Nov 3rd, 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	3mo ago Jul 16th, 2025	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: Calendar invite from recently registered domain	Sublime Security	1mo ago Sep 25th, 2025	Callback Phishing Evasion Social engineering File analysis Whois	/feeds/core/detection-rules/attachment-calendar-invite-from-recently-registered-domain-d801521c
Attachment: Callback phishing solicitation via image file	@vector_sec	1mo ago Sep 25th, 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	3mo ago Aug 5th, 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	Sublime Security	1mo ago Sep 22nd, 2025	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-ca39c83a
Attachment: Compensation review lure with QR code	Sublime Security	14d ago Oct 29th, 2025	Credential Phishing PDF QR code Social engineering File analysis Optical Character Recognition QR code analysis Natural Language Understanding Sender analysis Header analysis	/feeds/core/detection-rules/attachment-compensation-review-lure-with-qr-code-9fd8185c
Attachment: DocuSign impersonation via PDF linking to new domain	Sublime Security	3mo ago Aug 5th, 2025	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-via-pdf-linking-to-new-domain-f0c96282
Attachment: Dropbox image lure with no Dropbox domains in links	Sublime Security	3mo ago Jul 16th, 2025	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	3mo 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	/feeds/core/detection-rules/attachment-eml-with-link-to-credential-phishing-page-1df41cca
Attachment: EML with SharePoint files shared from GoDaddy federated tenants	Sublime Security	1mo ago Sep 23rd, 2025	Credential Phishing Evasion Impersonation: Brand Social engineering File analysis URL analysis Content analysis	/feeds/core/detection-rules/attachment-eml-with-sharepoint-files-shared-from-godaddy-federated-tenants-02c1f590
Attachment: EML with Sharepoint link likely unrelated to sender	Sublime Security	1mo ago Sep 23rd, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Evasion File analysis URL analysis Header analysis Sender analysis	/feeds/core/detection-rules/attachment-eml-with-sharepoint-link-likely-unrelated-to-sender-0a4fd31b
Attachment: EML with suspicious indicators	Sublime Security	3mo ago Aug 5th, 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	4d ago Nov 8th, 2025	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 Sep 22nd, 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	1mo 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	/feeds/core/detection-rules/attachment-fake-scan-to-email-ea850cc1
Attachment: Fake secure message and suspicious indicators	Sublime Security	3mo ago Jul 16th, 2025	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	3mo ago Aug 5th, 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: Fictitious invoice using LinkedIn's address	Sublime Security	2mo ago Sep 3rd, 2025	BEC/Fraud PDF Social engineering File analysis Optical Character Recognition Natural Language Understanding Content analysis Exif analysis	/feeds/core/detection-rules/attachment-fictitious-invoice-using-linkedins-address-aeee3d9f
Attachment: HTML smuggling Microsoft sign in	Sublime Security	3mo ago Aug 5th, 2025	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	1y 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	3mo ago Aug 5th, 2025	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: Legal themed message with PDF containing suspicious link	Sublime Security	3mo ago Aug 5th, 2025	Credential Phishing Evasion PDF Social engineering Content analysis File analysis Header analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/attachment-legal-themed-message-with-pdf-containing-suspicious-link-19133301
Attachment: Link to Doubleclick.net open redirect	Sublime Security	3mo ago Aug 5th, 2025	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	3mo ago Aug 5th, 2025	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	3mo ago Jul 16th, 2025	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	3mo ago Jul 16th, 2025	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: Office file with credential phishing URLs	Sublime Security	2mo ago Sep 2nd, 2025	Credential Phishing Evasion Social engineering File analysis URL analysis Archive analysis Content analysis	/feeds/core/detection-rules/attachment-office-file-with-credential-phishing-urls-b2cae98d
Attachment: Office file with document sharing and browser instruction lures	Sublime Security	27d ago Oct 16th, 2025	Credential Phishing Social engineering Evasion Archive analysis File analysis Macro analysis Optical Character Recognition Content analysis	/feeds/core/detection-rules/attachment-office-file-with-document-sharing-and-browser-instruction-lures-b1250a4b
Attachment: PDF file with link to fake Bitcoin exchange	Sublime Security	3mo ago Aug 5th, 2025	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	3mo ago Jul 16th, 2025	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: PDF with Microsoft Purview message impersonation	Sublime Security	2d ago Nov 10th, 2025	Credential Phishing Impersonation: Brand PDF Social engineering File analysis Natural Language Understanding Content analysis	/feeds/core/detection-rules/attachment-pdf-with-microsoft-purview-message-impersonation-571d4964
Attachment: PDF with recipient email in link	Sublime Security	1mo ago Oct 10th, 2025	Credential Phishing PDF QR code Encryption Social engineering File analysis QR code analysis URL analysis	/feeds/core/detection-rules/attachment-pdf-with-recipient-email-in-link-0399d08f
Attachment: QR code link with base64-encoded recipient address	Sublime Security	3mo ago Aug 5th, 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	2mo ago Sep 4th, 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	8d ago Nov 4th, 2025	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	3mo ago Jul 16th, 2025	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: Soda PDF producer with encryption themes	Sublime Security	3mo ago Aug 5th, 2025	Credential Phishing PDF Social engineering File analysis Optical Character Recognition	/feeds/core/detection-rules/attachment-soda-pdf-producer-with-encryption-themes-af8eeca4
Attachment: Suspicious employee policy update document lure	Sublime Security	14d ago Oct 29th, 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: USDA bid invitation impersonation	Sublime Security	3mo 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	/feeds/core/detection-rules/attachment-usda-bid-invitation-impersonation-34eb9493
Attachment with VBA macros from employee impersonation (unsolicited)	Sublime Security	3mo ago Jul 16th, 2025	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	3mo ago Jul 16th, 2025	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 recipients	Sublime Security	3mo ago Aug 5th, 2025	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/becfraud-generic-scam-attempt-to-undisclosed-recipients-5dac401f
BEC/Fraud: Penpal scam	Sublime Security	3mo ago Aug 5th, 2025	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/becfraud-penpal-scam-a4bdfa17
BEC/Fraud: Romance scam	Sublime Security	3mo ago Aug 5th, 2025	BEC/Fraud Free email provider Social engineering Content analysis Header analysis	/feeds/core/detection-rules/becfraud-romance-scam-0243cdaa