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 Jan 23rd, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Service abuse: DocSend share from newly registered domain	Sublime Security	12d 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	5mo 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	12d 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	5mo 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	12d 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	12d 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	2mo 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	2mo 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: Free provider with SendGrid routing	Sublime Security	16d 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	8d 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	5mo 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	1mo 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	12d 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	5mo 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	2mo 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	5mo 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	12d 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 BI callback scam	Sublime Security	2d 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 infrastructure with phishing intent	Sublime Security	12d ago Jan 12th, 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	12d 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	12d 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	12d 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	12d 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	12d 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	3mo 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	1mo 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	12d 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	12d 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	2mo 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
Service abuse: SurveyMonkey survey from newly registered domain	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-surveymonkey-survey-from-newly-registered-domain-50a85fa7
Service abuse: Suspicious Zoom Docs link	Sublime Security	1mo ago Dec 2nd, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header analysis	/feeds/core/detection-rules/service-abuse-suspicious-zoom-docs-link-064b2594
Service abuse: Task management message sent via SendGrid	Sublime Security	3mo ago Oct 6th, 2025	Credential Phishing Impersonation: Brand Social engineering Evasion Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/service-abuse-task-management-message-sent-via-sendgrid-568a63f5
Service abuse: Trello board invitation with VIP impersonation	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Impersonation: VIP Social engineering Content analysis Header analysis HTML analysis Sender analysis	/feeds/core/detection-rules/service-abuse-trello-board-invitation-with-vip-impersonation-fedfc94b
Service abuse: Wix redirect through bulk mailer domains	Sublime Security	12d ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion Open redirect URL analysis Sender analysis	/feeds/core/detection-rules/service-abuse-wix-redirect-through-bulk-mailer-domains-60af216d
Sharepoint link likely unrelated to sender	Sublime Security	12d ago Jan 12th, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Lookalike domain OneNote PDF Social engineering URL analysis Sender analysis Header analysis HTML analysis	/feeds/core/detection-rules/sharepoint-link-likely-unrelated-to-sender-6870f489
Sharepoint online with external recipients and external display name	@vector_sec	3y ago Aug 17th, 2023	Credential Phishing Spam Evasion Content analysis Header analysis Sender analysis	/feeds/core/detection-rules/sharepoint-online-with-external-recipients-and-external-display-name-5579bb4b
Spam: Attendee list solicitation	Sublime Security	4mo ago Aug 29th, 2025	Spam Content analysis Sender analysis	/feeds/core/detection-rules/spam-attendee-list-solicitation-69715b62
Spam: Campaign with excessive space/char obfuscation and free file hosted link	Sublime Security	12d ago Jan 12th, 2026	Spam Free file host Content analysis Sender analysis	/feeds/core/detection-rules/spam-campaign-with-excessive-spacechar-obfuscation-and-free-file-hosted-link-122bc0ca
Spam: Commonly observed formatting of unauthorized free giveaways	Sublime Security	10d ago Jan 14th, 2026	Spam Impersonation: Brand Social engineering Content analysis HTML analysis Sender analysis URL analysis	/feeds/core/detection-rules/spam-commonly-observed-formatting-of-unauthorized-free-giveaways-8bc49fa3
Spam: Default Microsoft Exchange Online sender domain (onmicrosoft.com)	Sublime Security	12d ago Jan 12th, 2026	Callback Phishing Credential Phishing Spam Free email provider Impersonation: Brand Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/spam-default-microsoft-exchange-online-sender-domain-onmicrosoftcom-3f2a64ce
Spam: Fake dating profile notification	Sublime Security	1mo ago Dec 3rd, 2025	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/spam-fake-dating-profile-notification-0f33fea2
Spam: Fake photo share	Sublime Security	2mo ago Nov 8th, 2025	Spam Evasion Social engineering Content analysis Sender analysis URL analysis Whois	/feeds/core/detection-rules/spam-fake-photo-share-eb086f7d
Spam: Firebase password reset from suspicious sender	Sublime Security	1mo ago Dec 2nd, 2025	Credential Phishing Spam Evasion Social engineering Header analysis Sender analysis URL analysis	/feeds/core/detection-rules/spam-firebase-password-reset-from-suspicious-sender-a2f673a9
Spam/fraud: Predatory journal/research paper request	Sublime Security	2mo ago Nov 3rd, 2025	BEC/Fraud Spam Social engineering Impersonation: Brand Lookalike domain Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Whois	/feeds/core/detection-rules/spamfraud-predatory-journalresearch-paper-request-263ca56b
Spam: Ghostwriting services scam with manipulative language	Sublime Security	3mo ago Oct 17th, 2025	Spam Social engineering Content analysis Sender analysis	/feeds/core/detection-rules/spam-ghostwriting-services-scam-with-manipulative-language-b747c3ea
Spam: Image as content with hidden HTML element	Sublime Security	15h ago Jan 23rd, 2026	Spam Evasion Image as content Content analysis HTML analysis Sender analysis	/feeds/core/detection-rules/spam-image-as-content-with-hidden-html-element-5de8861f
Spam: Item giveaway spam template	Sublime Security	5mo ago Aug 5th, 2025	Spam Image as content Content analysis HTML analysis Sender analysis Exif analysis	/feeds/core/detection-rules/spam-item-giveaway-spam-template-06a5f93b
Spam: Link to blob.core.windows.net from new domain (<30d)	Sublime Security	6mo ago Jul 16th, 2025	Spam Free subdomain host Header analysis URL analysis Sender analysis	/feeds/core/detection-rules/spam-link-to-blobcorewindowsnet-from-new-domain-less30d-a09b3800
Spam: Mastercard promotional content with image-based body	Sublime Security	2mo ago Nov 5th, 2025	Credential Phishing Spam Image as content Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis	/feeds/core/detection-rules/spam-mastercard-promotional-content-with-image-based-body-5f2cb559
Spam: New job cold outreach from unsolicited sender	Sublime Security	3mo ago Sep 29th, 2025	Spam Content analysis Natural Language Understanding Sender analysis URL analysis	/feeds/core/detection-rules/spam-new-job-cold-outreach-from-unsolicited-sender-ec39b789

594 Rules

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