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
Link: Microsoft protected message with matching sender and recipient addresses	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Social engineering Content analysis File analysis Header analysis Sender analysis URL analysis
Link: Multistage landing - Abused Adobe Acrobat hosted PDF	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Computer Vision Optical Character Recognition URL analysis Header analysis Sender analysis
Link: Multistage landing - Abused Docusign	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Evasion Free subdomain host Free file host Content analysis Sender analysis URL analysis Whois HTML analysis
Link: Multistage landing - Abused Google Drive	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Evasion Free email provider Free file host Content analysis Sender analysis URL analysis Whois HTML analysis
Link: Multistage landing - Ludus presentation	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Evasion Social engineering Impersonation: Brand Header analysis URL analysis Computer Vision URL screenshot Natural Language Understanding Optical Character Recognition Sender analysis
Link: Multistage landing - Trello board abuse	Sublime Security	8mo ago Aug 20th, 2025	Credential Phishing Free file host Social engineering URL analysis Content analysis Sender analysis URL screenshot
Link: MyActiveCampaign Link Abuse	Sublime Security	8mo ago Aug 20th, 2025	Credential Phishing Social engineering Natural Language Understanding URL analysis Sender analysis
Link: .onion From Unsolicited Sender	Sublime Security	8mo ago Jul 30th, 2025	Malware/Ransomware Credential Phishing Evasion Social engineering URL analysis Header analysis Sender analysis
Link: PDF and financial display text to free file host	Sublime Security	7mo ago Sep 24th, 2025	Credential Phishing Free file host Free email provider Social engineering Content analysis Sender analysis URL analysis
Link: PDF filename impersonation with credential theft language	Sublime Security	2mo ago Feb 12th, 2026	Credential Phishing Social engineering Evasion PDF Content analysis Natural Language Understanding Header analysis Sender analysis URL analysis
Link: QR code with phishing disposition in img or pdf	Sublime Security	8mo ago Jul 30th, 2025	Credential Phishing QR code Social engineering Content analysis Computer Vision QR code analysis Sender analysis URL analysis
Link: QR Code with suspicious language (untrusted sender)	Sublime Security	8mo ago Jul 30th, 2025	Credential Phishing Impersonation: Brand QR code Social engineering Content analysis Computer Vision Natural Language Understanding QR code analysis Sender analysis URL analysis
Link: Recipient domain in URL path	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Lookalike domain Header analysis Sender analysis URL analysis
Link: Referrer anonymization service from untrusted sender	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Open redirect Evasion Header analysis URL analysis Sender analysis
Link: Scribd fullscreen link from suspicious sender	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Free file host Social engineering Evasion URL analysis Sender analysis
Link: Secure SharePoint file share from new or unusual sender	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Free file host Evasion Content analysis Sender analysis
Link: Self-sender with sender org in subject and credential theft indicator	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Header analysis
Link: Self-sent message with quarterly document review request	Sublime Security	3mo ago Jan 21st, 2026	BEC/Fraud Credential Phishing Social engineering Evasion Content analysis Header analysis Sender analysis URL analysis
Link: SharePoint files shared from GoDaddy federated tenants	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Evasion Sender analysis URL analysis
Link: SharePoint OneNote or PDF link with self sender behavior	Sublime Security	1mo ago Feb 27th, 2026	Credential Phishing Evasion Free file host OneNote PDF Header analysis URL analysis Sender analysis
Link: Single character path with credential theft body and self sender behavior or invalid recipient	Sublime Security	11h ago Apr 24th, 2026	Credential Phishing Evasion Social engineering Natural Language Understanding URL analysis Sender analysis Header analysis
Link: Squarespace infrastructure abuse	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Spam Impersonation: Brand Social engineering Header analysis URL analysis Sender analysis
Link: Suspicious Sharepoint folder share	Sublime Security	8mo ago Aug 5th, 2025	Credential Phishing Free file host Evasion HTML analysis Header analysis Sender analysis URL analysis
Link to a domain with punycode characters	@ajpc500	5mo ago Nov 12th, 2025	Credential Phishing Evasion Lookalike domain Punycode Sender analysis URL analysis
Link to auto-downloaded disk image in encrypted zip	@ajpc500	3mo ago Jan 12th, 2026	Malware/Ransomware Encryption Evasion Social engineering Archive analysis File analysis Sender analysis URL analysis YARA
Link to auto-downloaded DMG in archive	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Evasion Archive analysis File analysis Sender analysis URL analysis
Link to auto-downloaded DMG in encrypted zip	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Encryption Evasion Social engineering Archive analysis File analysis Sender analysis URL analysis YARA
Link to auto-downloaded file with Adobe branding	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Impersonation: Brand Social engineering File analysis Optical Character Recognition Sender analysis URL analysis URL screenshot
Link to auto-download of a suspicious file type (unsolicited)	Sublime Security	3mo ago Jan 12th, 2026	Malware/Ransomware Encryption Evasion LNK Social engineering Archive analysis File analysis Sender analysis URL analysis YARA
Link to Google Apps Script macro (unsolicited)	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Open redirect Social engineering Sender analysis URL analysis
Link to Google Apps Script macro via comment tagging	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Malware/Ransomware Social engineering Content analysis Sender analysis URL analysis
Link: Unsolicited email contains link to page containing Tycoon URI structure	Sublime Security	1mo ago Mar 10th, 2026	Credential Phishing Evasion Social engineering Sender analysis URL analysis URL screenshot
Link: URL redirecting to blob URL	Sublime Security	1mo ago Feb 24th, 2026	Credential Phishing Malware/Ransomware Evasion Free file host Open redirect Sender analysis URL analysis Threat intelligence
Link: Webflow link from unsolicited sender	Sublime Security	8mo ago Aug 5th, 2025	Callback Phishing Free file host Free subdomain host Content analysis URL analysis Sender analysis
Link: Zoho form link from unsolicited sender	Sublime Security	8mo ago Aug 5th, 2025	Callback Phishing Free file host Content analysis URL analysis Sender analysis
Lookalike sender domain (untrusted sender)	Sublime Security	1mo ago Mar 25th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Lookalike domain Social engineering Sender analysis
Low reputation link to auto-downloaded HTML file with smuggling indicators	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Evasion Free file host Free subdomain host HTML smuggling Impersonation: Brand Open redirect Social engineering Content analysis File analysis HTML analysis Javascript analysis Sender analysis URL analysis
MalwareBazaar: Malicious attachment hash in archive (trusted reporters)	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Evasion Archive analysis File analysis Sender analysis Threat intelligence
MalwareBazaar: Malicious attachment hash (trusted reporters)	Sublime Security	30d ago Mar 26th, 2026	Malware/Ransomware File analysis Sender analysis Threat intelligence
Mass campaign: Cross Site Scripting (XSS) attempt	Sublime Security	9mo ago Jul 16th, 2025	Malware/Ransomware Spam Exploit Free email provider Scripting Social engineering Content analysis Header analysis Sender analysis
Mass campaign: recipient address in subject, body, and link (untrusted sender)	Sublime Security	3mo ago Jan 12th, 2026	Credential Phishing Social engineering Header analysis Natural Language Understanding Sender analysis
Message traversed multiple onmicrosoft.com tenants	Sublime Security	3mo ago Jan 12th, 2026	Callback Phishing Evasion Free email provider Free subdomain host Sender analysis Header analysis
Microsoft device code phishing	@ajpc500	3mo ago Jan 12th, 2026	Credential Phishing Impersonation: Brand Social engineering Content analysis Sender analysis URL analysis
Microsoft infrastructure abuse with suspicious patterns	Sublime Security	3mo ago Jan 12th, 2026	BEC/Fraud Callback Phishing Evasion Impersonation: Brand Social engineering Header analysis Sender analysis
Mismatched links: Free file share with urgent language	Sublime Security	8mo ago Aug 5th, 2025	BEC/Fraud Callback Phishing Credential Phishing Extortion Malware/Ransomware Spam Free file host Social engineering Natural Language Understanding Sender analysis URL analysis
New link domain (<=10d) from untrusted sender	Sublime Security	2mo ago Feb 6th, 2026	Credential Phishing Malware/Ransomware Sender analysis URL analysis Whois
New sender domain (<=10d) from untrusted sender	Sublime Security	2y ago Nov 20th, 2024	Sender analysis Whois
Non-RFC compliant calendar files from unsolicited sender	Sublime Security	6mo ago Oct 1st, 2025	Evasion Social engineering Archive analysis Content analysis File analysis Sender analysis
Notion suspicious file share	Sublime Security	9mo ago Jul 16th, 2025	Credential Phishing Malware/Ransomware Evasion Free file host Content analysis Sender analysis URL analysis
Observed IOC: Malicious sender domains	Sublime Security	11h ago Apr 24th, 2026	BEC/Fraud Credential Phishing Malware/Ransomware Impersonation: Domain Social engineering Sender analysis Header analysis

646 Rules

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