Sublime Security

Sublime Core Feed
Content analysis
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Attack Types
BEC/Fraud
Callback Phishing
Credential Phishing
Extortion
Malware/Ransomware
Reconnaissance
Spam
Tactics and Techniques
Encryption
Evasion
Exploit
Free email provider
Free file host
Free subdomain host
HTML smuggling
Image as content
Impersonation: Brand
Impersonation: Employee
Impersonation: VIP
IPFS
ISO
LNK
Lookalike domain
Macros
OneNote
Open redirect
Out of band pivot
PDF
Punycode
QR code
Scripting
Social engineering
Spoofing
Detection Methods
Archive analysis
Content analysis
Computer Vision
Exif analysis
File analysis
Header analysis
HTML analysis
Javascript analysis
Macro analysis
Natural Language Understanding
Optical Character Recognition
OLE analysis
PDF analysis
QR code analysis
Sender analysis
Threat intelligence
URL analysis
URL screenshot
Whois
XML analysis
YARA
Detection Method: Content analysis
Content analysis looks at the language and structure of a message to identify signs of phishing, social engineering, and other malicious intent. Instead of scanning for keywords, this method uses natural language understanding (NLU) to detect meaning, intent, and tone across the message.
Content analysis helps detect:
BEC attempts with urgent messages from executive impersonators
Credential phishing disguised as login or document notifications
Callback scams posing as account renewals or fake support
Extortion threats or blackmail messages
Financial or personal data requests in suspicious contexts
Fake job offers targeting employees
Invoice fraud, payroll fraud, and more
For example, a phishing email may impersonate a CFO asking for a wire transfer. Content analysis can flag the urgent tone, financial context, and impersonation attempt.
Blog Posts
Hiding a $50,000 BEC financial fraud in a fake email thread · Blog · Sublime Security
Callback phishing via invoice abuse and distribution list relays · Blog · Sublime Security
Hidden credential phishing within EML attachments · Blog · Sublime Security
Living Off the Land: Credential Phishing via Docusign abuse · Blog · Sublime Security
Living Off the Land: Callback Phishing via Docusign comment · Blog · Sublime Security
Adversarial ML: Extortion via LLM Manipulation Tactics · Blog · Sublime Security
Fake invoice used to conduct $16,800 BEC attempt · Blog · Sublime Security
QR Code Phishing: Decoding Hidden Threats · Blog · Sublime Security
Call Me Maybe? The Rise of Callback Phishing Emails · Blog · Sublime Security
Detecting QakBot: WSF attachments, OneNote files, and generic attack surface reduction · Blog · Sublime Security
Attack Types (7):
Credential Phishing
Malware/Ransomware
BEC/Fraud
Spam
Callback Phishing
Extortion
Reconnaissance
Tactics & Techniques (26):
Free file host
Image as content
Impersonation: Brand
Social engineering
Evasion
Impersonation: VIP
Free subdomain host
Out of band pivot
Free email provider
QR code
PDF
Open redirect
Encryption
Scripting
Spoofing
Lookalike domain
Impersonation: Employee
Exploit
Macros
Credential Phishing
HTML smuggling
LNK
OneNote
HTML injection
IPFS
ISO
Rule Name & Severity
Last Updated
Types, Tactics & Capabilities
Cloud storage impersonation with credential theft indicators
21h ago
Mar 13th, 2026
Sublime Security
Credential Phishing
Free file host
Image as content
Impersonation: Brand
Social engineering
Computer Vision
Content analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
URL analysis
Credential Phishing
Free file host
Image as content
Impersonation: Brand
Social engineering
Computer Vision
Content analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
URL analysis
Link: Obfuscation via userinfo with suspicious indicators
21h ago
Mar 13th, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
URL analysis
Content analysis
Credential Phishing
Malware/Ransomware
Evasion
URL analysis
Content analysis
VIP impersonation with w2 request with reply-to mismatch
2d ago
Mar 12th, 2026
Sublime Security
BEC/Fraud
Impersonation: VIP
Content analysis
Header analysis
Natural Language Understanding
BEC/Fraud
Impersonation: VIP
Content analysis
Header analysis
Natural Language Understanding
Link: Microsoft device code authentication with suspicious indicators
2d ago
Mar 12th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Evasion
URL analysis
URL screenshot
Content analysis
Credential Phishing
Impersonation: Brand
Social engineering
Evasion
URL analysis
URL screenshot
Content analysis
Service abuse: Google Firebase sender address with suspicious content
2d ago
Mar 12th, 2026
Sublime Security
Spam
Credential Phishing
Free subdomain host
Social engineering
Content analysis
Header analysis
HTML analysis
Natural Language Understanding
Sender analysis
URL analysis
Whois
Spam
Credential Phishing
Free subdomain host
Social engineering
Content analysis
Header analysis
HTML analysis
Natural Language Understanding
Sender analysis
URL analysis
Whois
Brand impersonation: SendGrid
2d ago
Mar 12th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Spam
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
BEC/Fraud
Credential Phishing
Spam
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
BEC/Fraud: Reply-chain manipulation with urgent keywords and self-reply
3d ago
Mar 11th, 2026
Sublime Security
BEC/Fraud
Social engineering
Evasion
Content analysis
Header analysis
Sender analysis
BEC/Fraud
Social engineering
Evasion
Content analysis
Header analysis
Sender analysis
Brand impersonation: McAfee
3d ago
Mar 11th, 2026
Sublime Security
Credential Phishing
BEC/Fraud
Callback Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Credential Phishing
BEC/Fraud
Callback Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Brand impersonation: GitHub with callback scam indicators
3d ago
Mar 11th, 2026
Sublime Security
Callback Phishing
Impersonation: Brand
Out of band pivot
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
Callback Phishing
Impersonation: Brand
Out of band pivot
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
Impersonation: Legal firm with copyright infringement notice
4d ago
Mar 10th, 2026
Sublime Security
BEC/Fraud
Extortion
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
BEC/Fraud
Extortion
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
Spam: Sexually explicit content with emoji in subject from freemail provider
4d ago
Mar 10th, 2026
Sublime Security
Spam
Free email provider
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Spam
Free email provider
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
BEC/Fraud: Romance scam
5d ago
Mar 9th, 2026
Sublime Security
BEC/Fraud
Free email provider
Social engineering
Content analysis
Header analysis
BEC/Fraud
Free email provider
Social engineering
Content analysis
Header analysis
Service abuse: File sharing impersonation with external SharePoint links
5d ago
Mar 9th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
URL analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
URL analysis
Sender analysis
Link: Mixed case HTTPS protocol
5d ago
Mar 9th, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
Content analysis
URL analysis
Credential Phishing
Malware/Ransomware
Evasion
Content analysis
URL analysis
Service abuse: Monday.com infrastructure with phishing intent
5d ago
Mar 9th, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
QR code
Content analysis
File analysis
Header analysis
QR code analysis
Sender analysis
URL analysis
Credential Phishing
Evasion
Social engineering
QR code
Content analysis
File analysis
Header analysis
QR code analysis
Sender analysis
URL analysis
Credential phishing: Blue button styled link with file-sharing template artifacts
5d ago
Mar 9th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
HTML analysis
URL analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
HTML analysis
URL analysis
Request for Quote or Purchase (RFQ|RFP) with suspicious sender or recipient pattern
5d ago
Mar 9th, 2026
Sublime Security
BEC/Fraud
Evasion
Free email provider
Content analysis
Natural Language Understanding
URL analysis
BEC/Fraud
Evasion
Free email provider
Content analysis
Natural Language Understanding
URL analysis
Service abuse: Vimeo with external plain-text links in message
8d ago
Mar 6th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Sender analysis
Content analysis
URL analysis
Credential Phishing
Impersonation: Brand
Social engineering
Sender analysis
Content analysis
URL analysis
Attachment: PDF with suspicious link and action-oriented language
8d ago
Mar 6th, 2026
Sublime Security
Credential Phishing
PDF
Social engineering
Evasion
File analysis
URL analysis
Content analysis
URL screenshot
Credential Phishing
PDF
Social engineering
Evasion
File analysis
URL analysis
Content analysis
URL screenshot
Service abuse: Nylas tracking subdomain with suspicious content
8d ago
Mar 6th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
Natural Language Understanding
URL analysis
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
Natural Language Understanding
URL analysis
Page 1 of 25

Rule Name & Severity	Last Updated	Author	Types, Tactics & Capabilities
Cloud storage impersonation with credential theft indicators	21h ago Mar 13th, 2026	Sublime Security	Credential Phishing Free file host Image as content Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis
Link: Obfuscation via userinfo with suspicious indicators	21h ago Mar 13th, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion URL analysis Content analysis
VIP impersonation with w2 request with reply-to mismatch	2d ago Mar 12th, 2026	Sublime Security	BEC/Fraud Impersonation: VIP Content analysis Header analysis Natural Language Understanding
Link: Microsoft device code authentication with suspicious indicators	2d ago Mar 12th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Evasion URL analysis URL screenshot Content analysis
Service abuse: Google Firebase sender address with suspicious content	2d ago Mar 12th, 2026	Sublime Security	Spam Credential Phishing Free subdomain host Social engineering Content analysis Header analysis HTML analysis Natural Language Understanding Sender analysis URL analysis Whois
Brand impersonation: SendGrid	2d ago Mar 12th, 2026	Sublime Security	BEC/Fraud Credential Phishing Spam Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis
BEC/Fraud: Reply-chain manipulation with urgent keywords and self-reply	3d ago Mar 11th, 2026	Sublime Security	BEC/Fraud Social engineering Evasion Content analysis Header analysis Sender analysis
Brand impersonation: McAfee	3d ago Mar 11th, 2026	Sublime Security	Credential Phishing BEC/Fraud Callback Phishing Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Brand impersonation: GitHub with callback scam indicators	3d ago Mar 11th, 2026	Sublime Security	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
Impersonation: Legal firm with copyright infringement notice	4d ago Mar 10th, 2026	Sublime Security	BEC/Fraud Extortion Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis
Spam: Sexually explicit content with emoji in subject from freemail provider	4d ago Mar 10th, 2026	Sublime Security	Spam Free email provider Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
BEC/Fraud: Romance scam	5d ago Mar 9th, 2026	Sublime Security	BEC/Fraud Free email provider Social engineering Content analysis Header analysis
Service abuse: File sharing impersonation with external SharePoint links	5d ago Mar 9th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis URL analysis Sender analysis
Link: Mixed case HTTPS protocol	5d ago Mar 9th, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion Content analysis URL analysis
Service abuse: Monday.com infrastructure with phishing intent	5d ago Mar 9th, 2026	Sublime Security	Credential Phishing Evasion Social engineering QR code Content analysis File analysis Header analysis QR code analysis Sender analysis URL analysis
Credential phishing: Blue button styled link with file-sharing template artifacts	5d ago Mar 9th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis HTML analysis URL analysis
Request for Quote or Purchase (RFQ\|RFP) with suspicious sender or recipient pattern	5d ago Mar 9th, 2026	Sublime Security	BEC/Fraud Evasion Free email provider Content analysis Natural Language Understanding URL analysis
Service abuse: Vimeo with external plain-text links in message	8d ago Mar 6th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Sender analysis Content analysis URL analysis
Attachment: PDF with suspicious link and action-oriented language	8d ago Mar 6th, 2026	Sublime Security	Credential Phishing PDF Social engineering Evasion File analysis URL analysis Content analysis URL screenshot
Service abuse: Nylas tracking subdomain with suspicious content	8d ago Mar 6th, 2026	Sublime Security	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis Natural Language Understanding URL analysis