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 10th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
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: Large unknown recipient list	Sublime Security	3mo ago Nov 24th, 2025	Reconnaissance Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/reconnaissance-large-unknown-recipient-list-24783a28
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
Russia return-path TLD (untrusted sender)	Sublime Security	25d ago Feb 13th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Header analysis Sender analysis	/feeds/core/detection-rules/russia-return-path-tld-untrusted-sender-588b3954
Scam: Piano giveaway	Sublime Security	2mo ago Dec 11th, 2025	BEC/Fraud Free email provider Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/scam-piano-giveaway-1a91a203
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
Sender name contains Active Directory distinguished name	Sublime Security	2y ago Nov 13th, 2024	Credential Phishing Sender analysis	/feeds/core/detection-rules/sender-name-contains-active-directory-distinguished-name-4f3c4901
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: 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	20h 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: Free provider with SendGrid routing	Sublime Security	2mo ago Jan 8th, 2026	Credential Phishing Free email provider Evasion Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-free-provider-with-sendgrid-routing-3079cacb
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 application integration redirecting to suspicious hosts	Sublime Security	2mo ago Dec 17th, 2025	Credential Phishing Malware/Ransomware Evasion Free file host Free subdomain host Open redirect Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/service-abuse-google-application-integration-redirecting-to-suspicious-hosts-473d3247
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: HungerRush domain with SendGrid tracking targeting ProtonMail	Sublime Security	6d ago Mar 4th, 2026	BEC/Fraud Evasion Sender analysis HTML analysis Content analysis	/feeds/core/detection-rules/service-abuse-hungerrush-domain-with-sendgrid-tracking-targeting-protonmail-73f62e74
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	22h 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: Nifty.com with impersonation	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Spoofing Sender analysis	/feeds/core/detection-rules/service-abuse-niftycom-with-impersonation-370cfdac
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
Service abuse: Roomsy with unrelated body content	Sublime Security	3mo ago Dec 2nd, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis Natural Language Understanding	/feeds/core/detection-rules/service-abuse-roomsy-with-unrelated-body-content-18e08a5a
Service abuse: Sendgrid credential theft with personalized request targeting single recipient	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Natural Language Understanding Sender analysis Content analysis	/feeds/core/detection-rules/service-abuse-sendgrid-credential-theft-with-personalized-request-targeting-single-recipient-b9680da1
Service abuse: SendGrid impersonation via Sendgrid from new sender	Sublime Security	1mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-sendgrid-impersonation-via-sendgrid-from-new-sender-aa5d18ca
Service abuse: SendThisFile with credential theft and financial language	Sublime Security	4mo ago Oct 27th, 2025	BEC/Fraud Credential Phishing Free file host Social engineering Content analysis Natural Language Understanding Sender analysis	/feeds/core/detection-rules/service-abuse-sendthisfile-with-credential-theft-and-financial-language-c1ebf25b

619 Rules

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