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
ICS Phishing
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 (8):
Credential Phishing
BEC/Fraud
ICS Phishing
Callback Phishing
Malware/Ransomware
Spam
Extortion
Reconnaissance
Tactics & Techniques (26):
Impersonation: Brand
Social engineering
Image as content
Spoofing
Open redirect
Evasion
Free file host
PDF
Scripting
Out of band pivot
Free subdomain host
Lookalike domain
Encryption
Impersonation: VIP
Free email provider
Impersonation: Employee
HTML smuggling
ICS Phishing
QR code
LNK
Exploit
Service abuse
Macros
Credential Phishing
OneNote
HTML injection
Rule Name & Severity
Last Updated
Types, Tactics & Capabilities
Brand impersonation: Robinhood
19m ago
Aug 27th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
URL analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
URL analysis
Impersonation: SAM/SBA federal registration
19m ago
Aug 27th, 2026
Sublime Security
Credential Phishing
BEC/Fraud
Impersonation: Brand
Social engineering
Image as content
Sender analysis
Content analysis
HTML analysis
Header analysis
Credential Phishing
BEC/Fraud
Impersonation: Brand
Social engineering
Image as content
Sender analysis
Content analysis
HTML analysis
Header analysis
Attachment: ICS invite meeting lure
1h ago
Aug 27th, 2026
Sublime Security
ICS Phishing
Credential Phishing
Social engineering
Impersonation: Brand
Spoofing
Open redirect
Content analysis
URL analysis
Header analysis
Sender analysis
File analysis
ICS Phishing
Credential Phishing
Social engineering
Impersonation: Brand
Spoofing
Open redirect
Content analysis
URL analysis
Header analysis
Sender analysis
File analysis
Brand impersonation: McAfee
1h ago
Aug 27th, 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
Link: Microsoft protected message with suspicious recipient patterns
2h ago
Aug 27th, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
Content analysis
File analysis
Header analysis
Sender analysis
URL analysis
Credential Phishing
Evasion
Social engineering
Content analysis
File analysis
Header analysis
Sender analysis
URL analysis
Body: HTML whitespace stuffing with short initial message
2h ago
Aug 27th, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
Brand impersonation: Microsoft with low reputation links
4h ago
Aug 27th, 2026
Sublime Security
Credential Phishing
Free file host
Image as content
Impersonation: Brand
Social engineering
Computer Vision
Content analysis
File 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
File analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
URL analysis
Body: CSS clamp() font obfuscation with suspicious URL
20h ago
Aug 26th, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
HTML analysis
URL analysis
Content analysis
Credential Phishing
Evasion
Social engineering
HTML analysis
URL analysis
Content analysis
Attachment: PDF Grant Payment lure with embedded link
21h ago
Aug 26th, 2026
Sublime Security
Credential Phishing
PDF
Social engineering
File analysis
URL analysis
Content analysis
Credential Phishing
PDF
Social engineering
File analysis
URL analysis
Content analysis
ClickFix: Clipboard hijack lure with copy-paste-to-terminal instruction
1d ago
Aug 26th, 2026
Sublime Security
Malware/Ransomware
Credential Phishing
Evasion
Social engineering
Scripting
Content analysis
Natural Language Understanding
Sender analysis
URL analysis
Malware/Ransomware
Credential Phishing
Evasion
Social engineering
Scripting
Content analysis
Natural Language Understanding
Sender analysis
URL analysis
BEC/Fraud: Self-addressed reply with unrelated link in ongoing thread
1d ago
Aug 26th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Social engineering
Out of band pivot
URL analysis
Header analysis
Sender analysis
Content analysis
BEC/Fraud
Credential Phishing
Social engineering
Out of band pivot
URL analysis
Header analysis
Sender analysis
Content analysis
Link: Self-sender with sender org in subject and credential theft indicator
2d ago
Aug 25th, 2026
Sublime Security
Credential Phishing
Social engineering
Evasion
Natural Language Understanding
Content analysis
Sender analysis
URL analysis
Header analysis
Credential Phishing
Social engineering
Evasion
Natural Language Understanding
Content analysis
Sender analysis
URL analysis
Header analysis
Link: Fake RFP/bid reference number lure
2d ago
Aug 25th, 2026
Sublime Security
Credential Phishing
BEC/Fraud
Spam
Social engineering
Impersonation: Brand
Spoofing
Content analysis
URL analysis
Header analysis
Sender analysis
Credential Phishing
BEC/Fraud
Spam
Social engineering
Impersonation: Brand
Spoofing
Content analysis
URL analysis
Header analysis
Sender analysis
Business Email Compromise (BEC) with request for mobile number
2d ago
Aug 25th, 2026
Sublime Security
BEC/Fraud
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
BEC/Fraud
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
Business Email Compromise: Request for mobile number via reply thread hijacking
2d ago
Aug 25th, 2026
Sublime Security
BEC/Fraud
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
BEC/Fraud
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
Brand impersonation: Automobile assistance associations
2d ago
Aug 25th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Natural Language Understanding
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Natural Language Understanding
Header analysis
Sender analysis
Attachment: Invoice and W-9 PDFs with suspicious creators
2d ago
Aug 25th, 2026
Sublime Security
BEC/Fraud
PDF
Social engineering
Impersonation: Brand
File analysis
Optical Character Recognition
Exif analysis
Content analysis
BEC/Fraud
PDF
Social engineering
Impersonation: Brand
File analysis
Optical Character Recognition
Exif analysis
Content analysis
Attachment: ICS calendar invite with bid/RFP lure and suspicious link
2d ago
Aug 25th, 2026
Sublime Security
BEC/Fraud
ICS Phishing
Social engineering
Free file host
Free subdomain host
Lookalike domain
File analysis
Content analysis
URL analysis
Whois
BEC/Fraud
ICS Phishing
Social engineering
Free file host
Free subdomain host
Lookalike domain
File analysis
Content analysis
URL analysis
Whois
Link: Credential harvesting with excess padding evasion
2d ago
Aug 25th, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Exif analysis
URL screenshot
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Exif analysis
URL screenshot
Brand impersonation: AARP
2d ago
Aug 25th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
BEC/Fraud
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
Page 1 of 25

Rule Name & Severity	Last Updated	Author	Types, Tactics & Capabilities
Brand impersonation: Robinhood	19m ago Aug 27th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis URL analysis
Impersonation: SAM/SBA federal registration	19m ago Aug 27th, 2026	Sublime Security	Credential Phishing BEC/Fraud Impersonation: Brand Social engineering Image as content Sender analysis Content analysis HTML analysis Header analysis
Attachment: ICS invite meeting lure	1h ago Aug 27th, 2026	Sublime Security	ICS Phishing Credential Phishing Social engineering Impersonation: Brand Spoofing Open redirect Content analysis URL analysis Header analysis Sender analysis File analysis
Brand impersonation: McAfee	1h ago Aug 27th, 2026	Sublime Security	Credential Phishing BEC/Fraud Callback Phishing Impersonation: Brand Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Link: Microsoft protected message with suspicious recipient patterns	2h ago Aug 27th, 2026	Sublime Security	Credential Phishing Evasion Social engineering Content analysis File analysis Header analysis Sender analysis URL analysis
Body: HTML whitespace stuffing with short initial message	2h ago Aug 27th, 2026	Sublime Security	Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Brand impersonation: Microsoft with low reputation links	4h ago Aug 27th, 2026	Sublime Security	Credential Phishing Free file host Image as content Impersonation: Brand Social engineering Computer Vision Content analysis File analysis Header analysis Natural Language Understanding Optical Character Recognition Sender analysis URL analysis
Body: CSS clamp() font obfuscation with suspicious URL	20h ago Aug 26th, 2026	Sublime Security	Credential Phishing Evasion Social engineering HTML analysis URL analysis Content analysis
Attachment: PDF Grant Payment lure with embedded link	21h ago Aug 26th, 2026	Sublime Security	Credential Phishing PDF Social engineering File analysis URL analysis Content analysis
ClickFix: Clipboard hijack lure with copy-paste-to-terminal instruction	1d ago Aug 26th, 2026	Sublime Security	Malware/Ransomware Credential Phishing Evasion Social engineering Scripting Content analysis Natural Language Understanding Sender analysis URL analysis
BEC/Fraud: Self-addressed reply with unrelated link in ongoing thread	1d ago Aug 26th, 2026	Sublime Security	BEC/Fraud Credential Phishing Social engineering Out of band pivot URL analysis Header analysis Sender analysis Content analysis
Link: Self-sender with sender org in subject and credential theft indicator	2d ago Aug 25th, 2026	Sublime Security	Credential Phishing Social engineering Evasion Natural Language Understanding Content analysis Sender analysis URL analysis Header analysis
Link: Fake RFP/bid reference number lure	2d ago Aug 25th, 2026	Sublime Security	Credential Phishing BEC/Fraud Spam Social engineering Impersonation: Brand Spoofing Content analysis URL analysis Header analysis Sender analysis
Business Email Compromise (BEC) with request for mobile number	2d ago Aug 25th, 2026	Sublime Security	BEC/Fraud Social engineering Content analysis Natural Language Understanding Sender analysis
Business Email Compromise: Request for mobile number via reply thread hijacking	2d ago Aug 25th, 2026	Sublime Security	BEC/Fraud Social engineering Content analysis Natural Language Understanding Sender analysis
Brand impersonation: Automobile assistance associations	2d ago Aug 25th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis Natural Language Understanding Header analysis Sender analysis
Attachment: Invoice and W-9 PDFs with suspicious creators	2d ago Aug 25th, 2026	Sublime Security	BEC/Fraud PDF Social engineering Impersonation: Brand File analysis Optical Character Recognition Exif analysis Content analysis
Attachment: ICS calendar invite with bid/RFP lure and suspicious link	2d ago Aug 25th, 2026	Sublime Security	BEC/Fraud ICS Phishing Social engineering Free file host Free subdomain host Lookalike domain File analysis Content analysis URL analysis Whois
Link: Credential harvesting with excess padding evasion	2d ago Aug 25th, 2026	Sublime Security	Credential Phishing Evasion Social engineering Content analysis HTML analysis Exif analysis URL screenshot
Brand impersonation: AARP	2d ago Aug 25th, 2026	Sublime Security	BEC/Fraud Credential Phishing Impersonation: Brand Social engineering Content analysis Header analysis Sender analysis