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

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Service abuse: Recruiting with suspicious language patterns from legitimate platforms	Sublime Security	6mo ago Oct 7th, 2025	BEC/Fraud Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Service abuse: Roomsy with unrelated body content	Sublime Security	4mo ago Dec 2nd, 2025	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis Natural Language Understanding
Service abuse: Sendgrid credential theft with personalized request targeting single recipient	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Natural Language Understanding Sender analysis Content analysis
Service abuse: SendGrid-formatted link with actor-controlled fragment	Sublime Security	5mo ago Nov 24th, 2025	Credential Phishing Evasion Social engineering Content analysis URL analysis
Service abuse: SendGrid impersonation via Sendgrid from new sender	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis
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: Substack credential theft with confusable characters and branded button redirects	Sublime Security	1mo ago Mar 19th, 2026	Credential Phishing Social engineering Evasion Sender analysis HTML analysis Natural Language Understanding URL 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: Suspicious Zoom Docs link	Sublime Security	4mo ago Dec 2nd, 2025	Credential Phishing Social engineering Free file host Evasion HTML analysis Sender analysis Header 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 link likely unrelated to sender	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Credential Phishing Impersonation: Employee Lookalike domain OneNote PDF Social engineering URL analysis Sender analysis Header analysis HTML 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: BlackBaud infrastructure abuse	Sublime Security	2y ago Jan 17th, 2024	Spam Evasion Impersonation: Brand Image as content Social engineering Content analysis Header 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: Firebase password reset from suspicious sender	Sublime Security	4mo ago Dec 2nd, 2025	Credential Phishing Spam Evasion Social engineering Header analysis Sender analysis URL analysis
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: 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: 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: Unsolicited WordPress account creation or password reset request	Sublime Security	5mo ago Nov 24th, 2025	Spam Social engineering Header analysis Sender analysis URL analysis
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
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 display name: Gmail sender with engaging language	Sublime Security	1mo ago Mar 6th, 2026	BEC/Fraud Credential Phishing Social engineering Sender analysis
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 mailer received from Gmail servers	Sublime Security	9mo ago Jul 16th, 2025	Callback Phishing Spam Free email provider Social engineering Header 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
Suspicious request for financial information	Sublime Security	4mo ago Dec 6th, 2025	BEC/Fraud Free email provider Impersonation: Employee Impersonation: VIP Social engineering Content analysis Header analysis Sender analysis
Targeting: Specific AOL address	Sublime Security	25d ago Mar 31st, 2026	Spam Social engineering Header analysis
Tax Form: W-8BEN solicitation	Sublime Security	2mo ago Feb 23rd, 2026	BEC/Fraud Credential Phishing Social engineering Content analysis Header analysis URL analysis
Truth Social infrastructure abuse via link redirect	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Spam Evasion Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis

564 Rules

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