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

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Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Potential prompt injection attack in body HTML	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam BEC/Fraud Evasion Social engineering Header analysis HTML analysis Content analysis	/feeds/core/detection-rules/potential-prompt-injection-attack-in-body-html-5fb24736
Punycode sender domain	Sublime Security	3y ago Aug 21st, 2023	Credential Phishing Malware/Ransomware Evasion Lookalike domain Punycode Social engineering Sender analysis	/feeds/core/detection-rules/punycode-sender-domain-bc3d8db5
QR code to auto-download of a suspicious file type (unsolicited)	Sublime Security	4mo ago Oct 17th, 2025	Malware/Ransomware Evasion LNK Social engineering Archive analysis File analysis Sender analysis URL analysis QR code analysis	/feeds/core/detection-rules/qr-code-to-auto-download-of-a-suspicious-file-type-unsolicited-eed87ea2
QR Code with suspicious indicators	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing QR code Social engineering Content analysis Header analysis Computer Vision Natural Language Understanding QR code analysis Sender analysis URL analysis	/feeds/core/detection-rules/qr-code-with-suspicious-indicators-04f5c34f
Reconnaissance: Email address harvesting attempt	Sublime Security	15d ago Feb 23rd, 2026	BEC/Fraud Credential Phishing Spam Free email provider Social engineering Content analysis Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/reconnaissance-email-address-harvesting-attempt-bb31efbc
Reconnaissance: Empty message from uncommon sender	Sublime Security	13d ago Feb 25th, 2026	Spam Evasion Social engineering Content analysis Header analysis	/feeds/core/detection-rules/reconnaissance-empty-message-from-uncommon-sender-b347cdbc
Reconnaissance: Empty subject with mismatched reply-to from new sender	Sublime Security	1mo ago Feb 6th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Spoofing Header analysis Sender analysis	/feeds/core/detection-rules/reconnaissance-empty-subject-with-mismatched-reply-to-from-new-sender-12f4bd45
Reconnaissance: Hotel booking reply-to redirect	Sublime Security	1mo ago Jan 27th, 2026	BEC/Fraud Free email provider Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/reconnaissance-hotel-booking-reply-to-redirect-08c36035
Reconnaissance: Short generic greeting message	Sublime Security	1mo ago Jan 27th, 2026	BEC/Fraud Callback Phishing Social engineering Free email provider Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/reconnaissance-short-generic-greeting-message-c67dedab
Recruitee Infrastructure Abuse	Sublime Security	7mo ago Jul 16th, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis Whois	/feeds/core/detection-rules/recruitee-infrastructure-abuse-31cab83d
Salesforce infrastructure abuse	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis Header analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/salesforce-infrastructure-abuse-78a77c70
Self-sent fake PDF attachment with misleading link	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Free subdomain host Social engineering Content analysis URL analysis Sender analysis	/feeds/core/detection-rules/self-sent-fake-pdf-attachment-with-misleading-link-8a285d2e
Sendgrid voicemail phish	Sublime Security	3mo ago Nov 24th, 2025	Credential Phishing Social engineering Content analysis Header analysis	/feeds/core/detection-rules/sendgrid-voicemail-phish-21cad89c
Service abuse: Adobe Creative Cloud share from an unsolicited sender address	Sublime Security	4mo ago Oct 22nd, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-adobe-creative-cloud-share-from-an-unsolicited-sender-address-47e42ca1
Service abuse: Adobe legitimate domain with document approval language	Sublime Security	1mo ago Jan 23rd, 2026	BEC/Fraud Credential Phishing Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-adobe-legitimate-domain-with-document-approval-language-237f4da4
Service abuse: Adobe Sign notification from an unsolicited reply-to address	Sublime Security	7mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Spam Social engineering Impersonation: Brand Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-adobe-sign-notification-from-an-unsolicited-reply-to-address-d00893ba
Service abuse: Apple TestFlight with suspicious developer reference	Sublime Security	1mo ago Feb 6th, 2026	Spam Social engineering Content analysis HTML analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/service-abuse-apple-testflight-with-suspicious-developer-reference-e7ea0ee0
Service abuse: AppSheet infrastructure with suspicious indicators	Sublime Security	5mo ago Oct 6th, 2025	Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis Whois	/feeds/core/detection-rules/service-abuse-appsheet-infrastructure-with-suspicious-indicators-5937646a
Service Abuse: Box file sharing with credential phishing intent	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing BEC/Fraud Callback Phishing Evasion Social engineering Impersonation: Employee Impersonation: VIP Content analysis Natural Language Understanding Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-box-file-sharing-with-credential-phishing-intent-5bd0cb25
Service abuse: Callback phishing via Microsoft Teams invite	Sublime Security	2mo ago Dec 12th, 2025	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis URL analysis Sender analysis	/feeds/core/detection-rules/service-abuse-callback-phishing-via-microsoft-teams-invite-13e35e5f
Service abuse: Cisco secure email service with financial request	Sublime Security	5mo ago Oct 1st, 2025	BEC/Fraud Impersonation: Brand Social engineering Evasion Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-cisco-secure-email-service-with-financial-request-43a6daa8
Service abuse: DocSend share from an unsolicited reply-to address	Sublime Security	6d ago Mar 4th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-docsend-share-from-an-unsolicited-reply-to-address-b377e64c
Service abuse: DocSend share from newly registered domain	Sublime Security	1mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Evasion Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-docsend-share-from-newly-registered-domain-3bc152f2
Service abuse: DocuSign notification with suspicious sender or document name	Sublime Security	7mo ago Aug 5th, 2025	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis	/feeds/core/detection-rules/service-abuse-docusign-notification-with-suspicious-sender-or-document-name-5e4707cd
Service abuse: DocuSign share from an unsolicited reply-to address	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-docusign-share-from-an-unsolicited-reply-to-address-2f12d616
Service abuse: Dropbox share from an unsolicited reply-to address	Sublime Security	7mo ago Aug 5th, 2025	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis	/feeds/core/detection-rules/service-abuse-dropbox-share-from-an-unsolicited-reply-to-address-50a1499f
Service abuse: Dropbox share from new domain	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-dropbox-share-from-new-domain-0e664bd9
Service abuse: Dropbox share with suspicious sender or document name	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis	/feeds/core/detection-rules/service-abuse-dropbox-share-with-suspicious-sender-or-document-name-27007c9f
Service Abuse: ExactTarget with suspicious sender indicators	Sublime Security	4mo ago Nov 8th, 2025	Credential Phishing BEC/Fraud Evasion Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-exacttarget-with-suspicious-sender-indicators-6154f197
Service abuse: Facebook business with action required subject	Sublime Security	3mo ago Nov 17th, 2025	Credential Phishing Impersonation: Brand Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/service-abuse-facebook-business-with-action-required-subject-64297d2f
Service abuse: File sharing impersonation with external SharePoint links	Sublime Security	17h ago Mar 9th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis URL analysis Sender analysis	/feeds/core/detection-rules/service-abuse-file-sharing-impersonation-with-external-sharepoint-links-729661f2
Service abuse: FlipHTML5 with attachment deception and credential theft language	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Free file host Evasion Content analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/service-abuse-fliphtml5-with-attachment-deception-and-credential-theft-language-02464799
Service abuse: Formester with suspicious link behavior	Sublime Security	2mo ago Dec 19th, 2025	Credential Phishing BEC/Fraud Open redirect Social engineering Free file host Computer Vision Content analysis URL analysis URL screenshot	/feeds/core/detection-rules/service-abuse-formester-with-suspicious-link-behavior-e4b74fd4
Service abuse: GetAccept callback scam content	Sublime Security	1mo ago Jan 16th, 2026	Callback Phishing Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-getaccept-callback-scam-content-7ec2f70b
Service abuse: Google account notification with links to free file host	Sublime Security	7mo ago Aug 5th, 2025	Credential Phishing Impersonation: Brand Social engineering Free file host Header analysis URL analysis Sender analysis	/feeds/core/detection-rules/service-abuse-google-account-notification-with-links-to-free-file-host-59786115
Service abuse: Google classroom solicitation	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Impersonation: Brand Out of band pivot Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-google-classroom-solicitation-e9c39e92
Service abuse: Google Drive share from an unsolicited reply-to address	Sublime Security	7mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Credential Phishing Free email provider Social engineering Free file host Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-google-drive-share-from-an-unsolicited-reply-to-address-4581ec0c
Service abuse: Google Drive share from new reply-to domain	Sublime Security	3mo ago Nov 13th, 2025	BEC/Fraud Callback Phishing Credential Phishing Free email provider Social engineering Free file host Header analysis Sender analysis Whois	/feeds/core/detection-rules/service-abuse-google-drive-share-from-new-reply-to-domain-c1a2d367
Service abuse: HelloSign from an unsolicited sender address	Sublime Security	7mo ago Aug 5th, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-hellosign-from-an-unsolicited-sender-address-68ca0753
Service Abuse: HelloSign share with suspicious sender or document name	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis	/feeds/core/detection-rules/service-abuse-hellosign-share-with-suspicious-sender-or-document-name-464d98f3
Service abuse: Microsoft Power Automate callback scam impersonation	Sublime Security	5d ago Mar 5th, 2026	Callback Phishing Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-microsoft-power-automate-callback-scam-impersonation-18d1c18b
Service abuse: Microsoft Power BI callback scam	Sublime Security	1mo ago Jan 22nd, 2026	Callback Phishing Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-microsoft-power-bi-callback-scam-7a55388e
Service abuse: Monday.com callback scam	Sublime Security	1mo ago Jan 26th, 2026	Callback Phishing Social engineering Out of band pivot Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-mondaycom-callback-scam-82cf4502
Service abuse: Monday.com infrastructure with phishing intent	Sublime Security	20h ago Mar 9th, 2026	Credential Phishing Evasion Social engineering QR code Content analysis File analysis Header analysis QR code analysis Sender analysis URL analysis	/feeds/core/detection-rules/service-abuse-mondaycom-infrastructure-with-phishing-intent-a346e3b1
Service abuse: Nylas tracking subdomain with suspicious content	Sublime Security	4d ago Mar 6th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis	/feeds/core/detection-rules/service-abuse-nylas-tracking-subdomain-with-suspicious-content-a3a6c896
Service abuse: Payoneer callback scam	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis	/feeds/core/detection-rules/service-abuse-payoneer-callback-scam-b7fb174c
Service abuse: QuickBooks notification from new domain	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-quickbooks-notification-from-new-domain-c4f46473
Service abuse: QuickBooks notification with suspicious comments	Sublime Security	1mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-quickbooks-notification-with-suspicious-comments-a23d0950
Service abuse: Random Google Firebase sender address with suspicious content	Sublime Security	1mo ago Jan 12th, 2026	Spam Credential Phishing Free subdomain host Social engineering Content analysis Header analysis HTML analysis Natural Language Understanding Sender analysis URL analysis Whois	/feeds/core/detection-rules/service-abuse-random-google-firebase-sender-address-with-suspicious-content-9f8899a9
Service abuse: Recruiting with suspicious language patterns from legitimate platforms	Sublime Security	5mo ago Oct 7th, 2025	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-recruiting-with-suspicious-language-patterns-from-legitimate-platforms-29e12696

510 Rules

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