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: Nylas tracking subdomain with suspicious content	Sublime Security	1mo ago Mar 6th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis
Service abuse: Payoneer callback scam	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing BEC/Fraud Evasion Social engineering Sender analysis Header analysis Content analysis
Service abuse: QuickBooks notification from new domain	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header analysis
Service abuse: QuickBooks notification with suspicious comments	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Credential Phishing BEC/Fraud Evasion Social engineering Content analysis Sender analysis Header 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: 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: Wix redirect through bulk mailer domains	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Evasion Open redirect URL analysis 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
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: 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: 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: Unsolicited malformed PDF	Sublime Security	9mo ago Jul 16th, 2025	Spam Evasion Free email provider PDF Content analysis File analysis 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
Suspicious attachment: Duplicate decoy PDF files	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Evasion PDF File analysis Optical Character Recognition
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 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 Vercel link	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Evasion Content analysis Header analysis Sender analysis URL analysis
Suspicious recipients pattern with NLU credential theft indicators	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Content analysis Header analysis Natural Language Understanding URL analysis
Suspicious sender display name with long procedurally generated text blob	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Evasion Content analysis Sender analysis
Suspicious subject with long procedurally generated text blob	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Spam Evasion Content analysis Sender 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
Twitter infrastructure abuse via link shortener	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Spam Evasion Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis
Unicode QR code	Sublime Security	8mo ago Aug 25th, 2025	Credential Phishing Evasion Content analysis Sender analysis QR code analysis
Unusually long local part from untrusted sender address	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Spam Evasion Header analysis Sender analysis
URI protocol handler: search-ms	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Evasion File analysis HTML analysis
URL with Unicode U+2044 (⁄) or U+2215 (∕) characters	@delivr_to	3mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis URL analysis
Vendor compromise: GovDelivery message with suspicious link	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Malware/Ransomware Free subdomain host IPFS Social engineering Evasion Impersonation: Brand Natural Language Understanding URL analysis Whois
Venmo payment request abuse	Sublime Security	7mo ago Sep 5th, 2025	Callback Phishing BEC/Fraud Social engineering Impersonation: Brand Evasion Natural Language Understanding Content analysis Sender analysis HTML analysis
VIP impersonation: Fake thread with display name match, email mismatch	Sublime Security	22d ago Apr 3rd, 2026	BEC/Fraud Evasion Impersonation: VIP Social engineering Spoofing Content analysis Header analysis Sender analysis Whois
VIP Impersonation via Google Group relay with suspicious indicators	Sublime Security	5mo ago Nov 12th, 2025	BEC/Fraud Credential Phishing Malware/Ransomware Evasion Free email provider Impersonation: Employee Social engineering Spoofing Content analysis Header analysis Natural Language Understanding Sender analysis
Xero infrastructure abuse	Sublime Security	5mo ago Nov 3rd, 2025	Credential Phishing Evasion Social engineering Content analysis Header analysis Natural Language Understanding URL analysis

392 Rules

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