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 Oct 23rd, 2026

Feed Source

GitHub

Tactic or Technique is

Rule Name & Severity	Author	Last Updated	Labels
Attachment: PDF with suspicious HeadlessChrome metadata	Sublime Security	2mo ago Aug 24th, 2026	Credential Phishing Malware/Ransomware Evasion PDF File analysis Exif analysis
Attachment: PDF with suspicious language and redirect to suspicious file type	Sublime Security	9mo ago Jan 12th, 2026	Malware/Ransomware Credential Phishing Evasion PDF File analysis Natural Language Understanding Optical Character Recognition URL analysis
Attachment: PDF with suspicious link and action-oriented language	Sublime Security	2mo ago Aug 18th, 2026	Credential Phishing PDF Social engineering Evasion File analysis URL analysis Content analysis URL screenshot
Attachment: PDF with suspicious view document characteristics	Sublime Security	6mo ago Apr 23rd, 2026	Credential Phishing Malware/Ransomware PDF Social engineering Evasion File analysis YARA
Attachment: PDF with version-only producer and default metadata	Sublime Security	30d ago Sep 25th, 2026	BEC/Fraud Credential Phishing Image as content Social engineering Evasion Exif analysis Optical Character Recognition Content analysis
Attachment: Potential sandbox evasion in Office file	@ajpc500	9mo ago Jan 12th, 2026	Malware/Ransomware Evasion Macros File analysis Macro analysis
Attachment: PowerPoint with suspicious hyperlink	Sublime Security	9mo ago Jan 12th, 2026	Malware/Ransomware Evasion Scripting Exif analysis File analysis
Attachment: QR code link with encoded recipient address	Sublime Security	1mo ago Sep 22nd, 2026	Credential Phishing QR code Image as content Social engineering Evasion PDF Macros Computer Vision File analysis Natural Language Understanding QR code analysis Sender analysis
Attachment: QR code with encoded recipient targeting and redirect indicators	Sublime Security	8mo ago Jan 30th, 2026	Credential Phishing QR code Evasion Image as content Open redirect Archive analysis File analysis QR code analysis URL analysis
Attachment: QR code with recipient targeting and special characters	Sublime Security	8mo ago Feb 21st, 2026	Credential Phishing QR code Social engineering Evasion File analysis QR code analysis URL analysis Computer Vision
Attachment: QR code with suspicious URL patterns in EML file	Sublime Security	8mo ago Feb 21st, 2026	Credential Phishing QR code Evasion Social engineering Archive analysis File analysis QR code analysis URL analysis
Attachment: QR code with userinfo portion	Sublime Security	27d ago Sep 28th, 2026	Credential Phishing Malware/Ransomware Evasion Image as content PDF QR code QR code analysis File analysis Sender analysis
Attachment: RFC822 containing suspicious file sharing language with links from untrusted sender	Sublime Security	26d ago Sep 29th, 2026	Credential Phishing Evasion Social engineering File analysis Header analysis Natural Language Understanding Sender analysis
Attachment: RTF file with suspicious link	Sublime Security	1y ago Jul 23rd, 2025	Credential Phishing Evasion Archive analysis File analysis Sender analysis URL analysis
Attachment: RTF with embedded content	@amitchell516	2y ago Feb 26th, 2024	Malware/Ransomware Evasion File analysis YARA
Attachment: Self-sender PDF with minimal content and view prompt	Sublime Security	8mo ago Feb 12th, 2026	Credential Phishing Malware/Ransomware PDF Social engineering Evasion Content analysis File analysis Sender analysis
Attachment: SFX archive containing commands	Sublime Security	9mo ago Jan 12th, 2026	Malware/Ransomware Evasion Scripting File analysis
Attachment: Single-page PDF with S3-hosted HTML link	Sublime Security	3mo ago Jul 16th, 2026	Credential Phishing PDF Free file host Evasion File analysis Exif analysis URL analysis
Attachment: Small text file with link containing recipient email address	Sublime Security	5mo ago May 14th, 2026	Credential Phishing Evasion Social engineering File analysis URL analysis
Attachment: Suspicious employee policy update document lure	Sublime Security	10mo ago Dec 26th, 2025	Credential Phishing PDF Social engineering Evasion Content analysis File analysis Sender analysis
Attachment: Suspicious PDF created with headless browser	Sublime Security	3mo ago Jul 1st, 2026	Credential Phishing Evasion PDF Content analysis Exif analysis File analysis Optical Character Recognition
Attachment: Suspicious use of Unicode tag characters in ICS File	Sublime Security	21d ago Oct 4th, 2026	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Attachment: SVG files with evasion elements	Sublime Security	5mo ago May 8th, 2026	Malware/Ransomware Credential Phishing QR code Image as content Evasion File analysis XML analysis QR code analysis Sender analysis
Attachment: SVG file with HTML entity encoded href attributes	Sublime Security	5mo ago May 20th, 2026	Malware/Ransomware Credential Phishing Evasion HTML smuggling File analysis Content analysis
Attachment: SVG file with hyperlinks and cursor styling	Sublime Security	5mo ago May 20th, 2026	Credential Phishing Evasion Image as content File analysis XML analysis Content analysis
Attachment: TAR file with RAR type	Sublime Security	6mo ago Apr 24th, 2026	Malware/Ransomware Evasion Archive analysis File analysis
Attachment: Web files with suspicious comments	Sublime Security	1y ago Aug 8th, 2025	Credential Phishing Malware/Ransomware HTML smuggling Evasion File analysis HTML analysis Content analysis
Attachment: WinRAR CVE-2025-8088 exploitation	Sublime Security	9mo ago Jan 12th, 2026	Malware/Ransomware Exploit Evasion Archive analysis File analysis YARA
Attachment with encrypted zip (unsolicited)	Sublime Security	1y ago Jul 16th, 2025	Malware/Ransomware Evasion Encryption Archive analysis File analysis Sender analysis
Attachment with macro calling executable	Sublime Security	9mo ago Jan 12th, 2026	Malware/Ransomware Evasion Macros Archive analysis File analysis
Attachment with unscannable encrypted zip	Sublime Security	5mo ago Apr 30th, 2026	Malware/Ransomware Encryption Evasion Archive analysis File analysis YARA
Attachment: Word document with hyperlink and fraud language	Sublime Security	1mo ago Sep 4th, 2026	Credential Phishing BEC/Fraud Free email provider Social engineering Evasion File analysis XML analysis HTML analysis URL analysis Natural Language Understanding Sender analysis
Attachment: XLSX file with suspicious print titles metadata	Sublime Security	1y ago Sep 16th, 2025	Credential Phishing Evasion Macros File analysis Exif analysis
Attachment: ZIP containing Office binary with embedded DLL	Sublime Security	2mo ago Aug 24th, 2026	Malware/Ransomware Evasion Archive analysis File analysis YARA
Attachment: ZIP filename mismatch	Sublime Security	1mo ago Aug 31st, 2026	Malware/Ransomware Evasion Archive analysis YARA File analysis
Attachment: ZIP file with CVE-2026-0866 exploit	Sublime Security	7mo ago Mar 20th, 2026	Malware/Ransomware Exploit Evasion Archive analysis File analysis YARA
BEC/Fraud: Reply-chain manipulation with urgent keywords and self-reply	Sublime Security	7mo ago Mar 11th, 2026	BEC/Fraud Social engineering Evasion Content analysis Header analysis Sender analysis
BEC with unusual reply-to or return-path mismatch	Sublime Security	4mo ago Jun 5th, 2026	BEC/Fraud Evasion Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Benefits enrollment impersonation	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion Impersonation: Employee Out of band pivot Social engineering Content analysis Header analysis Sender analysis
Body: CSS clamp() font obfuscation	Sublime Security	1mo ago Sep 1st, 2026	Credential Phishing Evasion Social engineering HTML analysis URL analysis Content analysis
Body: CSS Hidden text via clip-path	Sublime Security	2mo ago Aug 5th, 2026	Spam Credential Phishing Evasion HTML analysis Content analysis
Body: CSS Hidden text via table-column	Sublime Security	1mo ago Sep 3rd, 2026	Credential Phishing Spam Evasion HTML analysis Content analysis
Body: CSS zero-value calc() obfuscation	Sublime Security	2mo ago Aug 5th, 2026	Credential Phishing Spam Evasion HTML analysis
Body: CVE-2026-42897 Exchange OWA stored XSS	Sublime Security	1mo ago Sep 9th, 2026	Malware/Ransomware Evasion Exploit Scripting Content analysis HTML analysis
Body: Embedded email headers indicative of thread hijacking/abuse	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing BEC/Fraud Spam Evasion Social engineering Spoofing Content analysis Header analysis Sender analysis
Body: Fake secure email portal with HTML obfuscation	Sublime Security	4mo ago Jun 18th, 2026	Credential Phishing Evasion Social engineering Spoofing Content analysis HTML analysis URL analysis Sender analysis Threat intelligence
Body HTML: Comment with 24-character hex token	Sublime Security	1mo ago Sep 1st, 2026	Spam Evasion Content analysis HTML analysis
Body HTML: Recipient SLD in HTML class	Sublime Security	1mo ago Sep 23rd, 2026	Credential Phishing Evasion Social engineering HTML analysis Header analysis Sender analysis
Body: HTML whitespace stuffing with short initial message	Sublime Security	5d ago Oct 20th, 2026	Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Body: Invisible Unicode obfuscation student loan callback phishing	Sublime Security	4mo ago Jun 25th, 2026	BEC/Fraud Credential Phishing Spam Evasion Social engineering HTML analysis Content analysis

557 Rules

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