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 Mar 9th, 2026

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	4mo 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	7mo 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	5mo 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 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	/feeds/core/detection-rules/attachment-callback-phishing-solicitation-via-image-file-60acbb36
Attachment: Callback phishing solicitation via pdf file	Sublime Security	7mo 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	5mo 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	2mo ago Dec 10th, 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: Credit card application with WhatsApp contact	Sublime Security	3mo ago Nov 20th, 2025	BEC/Fraud Social engineering Out of band pivot Content analysis File analysis Natural Language Understanding QR code analysis	/feeds/core/detection-rules/attachment-credit-card-application-with-whatsapp-contact-95b08315
Attachment: DocuSign impersonation via PDF linking to new domain	Sublime Security	1mo ago Jan 12th, 2026	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: DOCX with hyperlink targeting recipient address	Sublime Security	2mo ago Dec 17th, 2025	Credential Phishing Malware/Ransomware Evasion Social engineering File analysis Archive analysis XML analysis	/feeds/core/detection-rules/attachment-docx-with-hyperlink-targeting-recipient-address-9ec8fa49
Attachment: Dropbox image lure with no Dropbox domains in links	Sublime Security	7mo 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	1mo ago Jan 12th, 2026	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	7mo 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	5mo 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	5mo 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	1mo ago Jan 12th, 2026	Credential Phishing Evasion HTML smuggling Social engineering Content analysis File analysis	/feeds/core/detection-rules/attachment-eml-with-suspicious-indicators-deb5d08d
Attachment: Employment contract update with suspicious file naming	Sublime Security	1mo ago Jan 28th, 2026	Malware/Ransomware Evasion Social engineering Content analysis File analysis	/feeds/core/detection-rules/attachment-employment-contract-update-with-suspicious-file-naming-8bdcd2da
Attachment: Encrypted PDF with credential theft body	Sublime Security	12d ago Feb 26th, 2026	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: Encrypted zip file with payment-related lure	Sublime Security	3mo ago Nov 25th, 2025	BEC/Fraud Malware/Ransomware Encryption Evasion Social engineering Archive analysis Content analysis File analysis	/feeds/core/detection-rules/attachment-encrypted-zip-file-with-payment-related-lure-5d1eb7af
Attachment: Excel file with document sharing lure created by Go Excelize	Sublime Security	1mo ago Jan 29th, 2026	Credential Phishing Macros Social engineering File analysis Macro analysis Content analysis Exif analysis	/feeds/core/detection-rules/attachment-excel-file-with-document-sharing-lure-created-by-go-excelize-dfaf267f
Attachment: Fake attachment image lure	Sublime Security	5mo 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 lawyer & sports agent identities	Sublime Security	1mo ago Jan 26th, 2026	BEC/Fraud Impersonation: VIP Social engineering Content analysis Exif analysis File analysis Optical Character Recognition	/feeds/core/detection-rules/attachment-fake-lawyer-and-sports-agent-identities-7d3a2478
Attachment: Fake scan-to-email	Sublime Security	5mo 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	1mo ago Jan 12th, 2026	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	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	/feeds/core/detection-rules/attachment-fake-slack-installer-cded2d2f
Attachment: Fake voicemail via PDF	Sublime Security	7mo 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	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	/feeds/core/detection-rules/attachment-fake-zoom-installer-840a12a6
Attachment: Fictitious invoice using LinkedIn's address	Sublime Security	6mo 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	1mo ago Jan 12th, 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	/feeds/core/detection-rules/attachment-html-smuggling-microsoft-sign-in-878d6385
Attachment: HTML smuggling with embedded base64 streamed file download	Sublime Security	3y 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	2y 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	7mo 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: ICS file with meeting prefix	Sublime Security	1mo ago Jan 26th, 2026	BEC/Fraud Credential Phishing Social engineering File analysis Header analysis	/feeds/core/detection-rules/attachment-ics-file-with-meeting-prefix-383a5810
Attachment: Invoice and W-9 PDFs with suspicious creators	Sublime Security	1mo ago Jan 21st, 2026	BEC/Fraud PDF Social engineering Impersonation: Brand File analysis Optical Character Recognition Exif analysis Content analysis	/feeds/core/detection-rules/attachment-invoice-and-w-9-pdfs-with-suspicious-creators-305d6e32
Attachment: Legal themed message or PDF with suspicious indicators	Sublime Security	1mo ago Feb 5th, 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	/feeds/core/detection-rules/attachment-legal-themed-message-or-pdf-with-suspicious-indicators-19133301
Attachment: Link to Doubleclick.net open redirect	Sublime Security	7mo 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	1mo ago Jan 12th, 2026	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	7mo 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	1mo ago Jan 12th, 2026	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	1mo ago Jan 12th, 2026	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	1mo ago Jan 29th, 2026	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 contains W9 or invoice YARA signatures	Sublime Security	1mo ago Feb 4th, 2026	BEC/Fraud Credential Phishing PDF Social engineering File analysis YARA	/feeds/core/detection-rules/attachment-pdf-contains-w9-or-invoice-yara-signatures-9a8e8a98
Attachment: PDF file with link to fake Bitcoin exchange	Sublime Security	1mo ago Jan 12th, 2026	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 a suspicious string and single URL	Sublime Security	8d ago Mar 2nd, 2026	Credential Phishing PDF Social engineering Evasion Content analysis File analysis URL analysis Exif analysis	/feeds/core/detection-rules/attachment-pdf-with-a-suspicious-string-and-single-url-3bdbb7ad
Attachment: PDF with credential theft language and link to a free subdomain (unsolicited)	Sublime Security	1mo ago Jan 12th, 2026	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	3mo 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 multistage landing - ClickUp abuse	Sublime Security	11d ago Feb 27th, 2026	Credential Phishing Evasion Free file host Free subdomain host PDF Social engineering File analysis URL analysis Whois	/feeds/core/detection-rules/attachment-pdf-with-multistage-landing-clickup-abuse-0dc40316
Attachment: PDF with personal Microsoft OneNote URL	Sublime Security	3mo ago Dec 4th, 2025	Credential Phishing PDF Social engineering File analysis Content analysis	/feeds/core/detection-rules/attachment-pdf-with-personal-microsoft-onenote-url-0675bbc5
Attachment: PDF with recipient email in link	Sublime Security	7d ago Mar 3rd, 2026	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: PDF with suspicious link and action-oriented language	Sublime Security	4d ago Mar 6th, 2026	Credential Phishing PDF Social engineering Evasion File analysis URL analysis Content analysis URL screenshot	/feeds/core/detection-rules/attachment-pdf-with-suspicious-link-and-action-oriented-language-816d33a0

510 Rules

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