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 Apr 24th, 2026

Feed Source

GitHub

Detection Method is

Rule Name & Severity	Author	Last Updated	Labels
Service abuse: SendThisFile with credential theft and financial language	Sublime Security	5mo ago Oct 27th, 2025	BEC/Fraud Credential Phishing Free file host Social engineering Content analysis Natural Language Understanding Sender analysis
Service abuse: SurveyMonkey survey from newly registered domain	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Social engineering Content analysis Header analysis Sender analysis
Service abuse: Task management message sent via SendGrid	Sublime Security	6mo ago Oct 6th, 2025	Credential Phishing Impersonation: Brand Social engineering Evasion Content analysis Header analysis Sender analysis
Service abuse: Trello board invitation with VIP impersonation	Sublime Security	2mo ago Feb 3rd, 2026	Credential Phishing Impersonation: VIP Social engineering Content analysis Header analysis HTML analysis Sender analysis
Service abuse: Vimeo with external plain-text links in message	Sublime Security	1mo ago Mar 6th, 2026	Credential Phishing Impersonation: Brand Social engineering Sender analysis Content analysis URL analysis
Service abuse: WeTransfer callback scam	Sublime Security	2mo ago Jan 30th, 2026	Callback Phishing Social engineering Out of band pivot Content analysis Natural Language Understanding Sender analysis
Sharepoint file share with suspicious recipients pattern	Sublime Security	2y ago Mar 27th, 2024	Credential Phishing Malware/Ransomware Evasion Content analysis Header analysis URL analysis
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
SharePoint OTP for filename matching org name	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis
Shopify infrastructure abuse	Sublime Security	2y ago Nov 13th, 2024	Credential Phishing Spam Evasion Free subdomain host Impersonation: Brand Social engineering Content analysis Header analysis URL analysis
Spam: Attendee list solicitation	Sublime Security	7mo ago Aug 29th, 2025	Spam Content analysis Sender analysis
Spam: BlackBaud infrastructure abuse	Sublime Security	2y ago Jan 17th, 2024	Spam Evasion Impersonation: Brand Image as content Social engineering Content analysis Header analysis
Spam: Campaign with excessive display-text and keywords found	Sublime Security	3mo ago Jan 12th, 2026	Spam Content analysis
Spam: Campaign with excessive space/char obfuscation and free file hosted link	Sublime Security	3mo ago Jan 12th, 2026	Spam Free file host Content analysis Sender analysis
Spam: Commonly observed formatting of unauthorized free giveaways	Sublime Security	3mo ago Jan 14th, 2026	Spam Impersonation: Brand Social engineering Content analysis HTML analysis Sender analysis URL analysis
Spam: Cryptocurrency airdrop/giveaway	Sublime Security	6mo ago Oct 16th, 2025	Spam Social engineering Impersonation: Brand Content analysis
Spam: Default Microsoft Exchange Online sender domain (onmicrosoft.com)	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Credential Phishing Spam Free email provider Impersonation: Brand Social engineering Content analysis Sender analysis
Spam: Fake dating profile notification	Sublime Security	1mo ago Mar 20th, 2026	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis
Spam: Fake photo share	Sublime Security	5mo ago Nov 8th, 2025	Spam Evasion Social engineering Content analysis Sender analysis URL analysis Whois
Spam/fraud: Predatory journal/research paper request	Sublime Security	5mo ago Nov 3rd, 2025	BEC/Fraud Spam Social engineering Impersonation: Brand Lookalike domain Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Whois
Spam: Ghostwriting services scam with manipulative language	Sublime Security	6mo ago Oct 17th, 2025	Spam Social engineering Content analysis Sender analysis
Spam: Item giveaway spam template	Sublime Security	8mo ago Aug 5th, 2025	Spam Image as content Content analysis HTML analysis Sender analysis Exif analysis
Spam: Mastercard promotional content with image-based body	Sublime Security	5mo 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
Spam: New job cold outreach from unsolicited sender	Sublime Security	6mo ago Sep 29th, 2025	Spam Content analysis Natural Language Understanding Sender analysis URL analysis
Spam: New link domain (<=10d) and emojis	Sublime Security	9mo ago Jul 16th, 2025	Spam Free email provider Content analysis Sender analysis URL analysis Whois
Spam: Personalized subject and greetings via Salesforce Marketing Cloud	Sublime Security	5mo ago Nov 3rd, 2025	Spam Social engineering Content analysis Header analysis
Spam: Sendersrv.com with financial communications and unsubscribe language	Sublime Security	1mo ago Feb 24th, 2026	Spam Evasion Social engineering Header analysis Content analysis Natural Language Understanding Sender analysis
Spam: Sexually explicit content with emoji in subject from freemail provider	Sublime Security	1mo ago Mar 10th, 2026	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Spam: Sexually explicit Google Drive share	Sublime Security	8mo ago Aug 5th, 2025	Spam Social engineering Free email provider Content analysis Sender analysis
Spam: Sexually explicit Google group invitation	Sublime Security	5mo ago Nov 12th, 2025	Spam Free email provider Social engineering Content analysis Sender analysis
Spam: Sexually explicit Looker Studio report	Sublime Security	6mo ago Oct 2nd, 2025	Spam Social engineering Free email provider Content analysis Sender analysis
Spam: Single recipient duplicated in cc	Sublime Security	3mo ago Jan 12th, 2026	Spam Impersonation: Brand Social engineering Header analysis Content analysis URL analysis Sender analysis
Spam: SMTP & Proxy Communications in Email Body	Sublime Security	4mo ago Dec 2nd, 2025	Spam Free email provider Content analysis
Spam: Unsolicited malformed PDF	Sublime Security	9mo ago Jul 16th, 2025	Spam Evasion Free email provider PDF Content analysis File analysis Sender analysis
Spam: URL shortener with short body content and emojis	Sublime Security	3mo ago Jan 12th, 2026	Spam Free email provider Content analysis Sender analysis URL analysis
Spam: Website errors solicitation	Sublime Security	11d ago Apr 14th, 2026	Spam Content analysis Sender analysis Natural Language Understanding
Spoofable internal domain with suspicious signals	Sublime Security	9mo ago Jul 23rd, 2025	Credential Phishing Free file host Free subdomain host Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Subject and sender display name contains matching long alphanumeric string	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion Social engineering Content analysis Header analysis Sender analysis
Subject: Suspicious bracketed reference	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Impersonation: Brand Header analysis Content analysis
Suspected cross-site scripting (XSS) found in subject	Sublime Security	7mo ago Sep 4th, 2025	Credential Phishing Evasion Scripting Content analysis Sender analysis
Suspected lookalike domain with suspicious language	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Evasion Lookalike domain Social engineering Content analysis Natural Language Understanding Sender analysis Whois
Suspected WordPress abuse with cross-site scripting (XSS) indicators	Sublime Security	8mo ago Aug 5th, 2025	Malware/Ransomware Credential Phishing Scripting Impersonation: Brand Social engineering Content analysis Sender analysis
Suspicious attachment with unscannable Cloudflare link	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion PDF Social engineering Impersonation: Employee Impersonation: VIP File analysis URL analysis Sender analysis Content analysis Header analysis Natural Language Understanding
Suspicious DocuSign share from new domain	Sublime Security	8mo ago Aug 5th, 2025	BEC/Fraud Credential Phishing Evasion Free file host Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Suspicious invoice reference with missing or image-only attachments	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Content analysis Computer Vision File analysis Natural Language Understanding Sender analysis
Suspicious link to Looker Studio (lookerstudio.google.com) from a new and unsolicited sender	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis Sender analysis URL analysis
Suspicious message with unscannable Cloudflare link	Sublime Security	7mo ago Sep 22nd, 2025	Credential Phishing Content analysis Header analysis URL analysis Sender analysis
Suspicious message with unscannable Vercel link	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Evasion Content analysis Header analysis Sender analysis URL analysis
Suspicious newly registered reply-to domain with engaging financial or urgent language	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis URL analysis Whois
Suspicious recipient pattern and language with low reputation link to login	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis URL screenshot

522 Rules

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