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 (7):
BEC/Fraud
Credential Phishing
Spam
Callback Phishing
Malware/Ransomware
Extortion
Reconnaissance
Tactics & Techniques (23):
Social engineering
Free file host
Lookalike domain
Impersonation: Brand
Impersonation: Employee
Evasion
Spoofing
Open redirect
Free subdomain host
PDF
ICS Phishing
Out of band pivot
Free email provider
QR code
Image as content
Exploit
Impersonation: VIP
Scripting
Encryption
HTML smuggling
Macros
LNK
Service abuse
Rule Name & Severity
Last Updated
Types, Tactics & Capabilities
BEC/Fraud: Fake investment outreach from suspicious TLD
38m ago
Oct 6th, 2026
Sublime Security
BEC/Fraud
Social engineering
Header analysis
Sender analysis
Content analysis
Natural Language Understanding
BEC/Fraud
Social engineering
Header analysis
Sender analysis
Content analysis
Natural Language Understanding
Fake voicemail notification (untrusted sender)
1h ago
Oct 6th, 2026
Sublime Security
Credential Phishing
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
URL analysis
Credential Phishing
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
URL analysis
Link: Google Cloud Storage /index and /unsub link pair
4h ago
Oct 6th, 2026
Sublime Security
Spam
Free file host
Social engineering
URL analysis
Content analysis
Spam
Free file host
Social engineering
URL analysis
Content analysis
Link: Malformed subdomain ending in hyphen
5h ago
Oct 6th, 2026
Sublime Security
Credential Phishing
Social engineering
Lookalike domain
Impersonation: Brand
Impersonation: Employee
URL analysis
Content analysis
Credential Phishing
Social engineering
Lookalike domain
Impersonation: Brand
Impersonation: Employee
URL analysis
Content analysis
Link: Google Cloud Storage with short-path link delivery
5h ago
Oct 6th, 2026
Sublime Security
Spam
Credential Phishing
Free file host
Evasion
Social engineering
Impersonation: Brand
URL analysis
Content analysis
Spam
Credential Phishing
Free file host
Evasion
Social engineering
Impersonation: Brand
URL analysis
Content analysis
Service Abuse: American Express callback scam
5h ago
Oct 6th, 2026
Sublime Security
Callback Phishing
Impersonation: Brand
Social engineering
Natural Language Understanding
Content analysis
Sender analysis
Callback Phishing
Impersonation: Brand
Social engineering
Natural Language Understanding
Content analysis
Sender analysis
Link: Observed URL path (lht) with recipient email address
5h ago
Oct 6th, 2026
Sublime Security
Credential Phishing
Social engineering
Impersonation: Brand
Evasion
Spoofing
URL analysis
Content analysis
Header analysis
Credential Phishing
Social engineering
Impersonation: Brand
Evasion
Spoofing
URL analysis
Content analysis
Header analysis
Service abuse: Lovable-hosted redirect to external phishing page
6h ago
Oct 6th, 2026
Sublime Security
Credential Phishing
Social engineering
Open redirect
Free subdomain host
URL analysis
HTML analysis
Content analysis
Credential Phishing
Social engineering
Open redirect
Free subdomain host
URL analysis
HTML analysis
Content analysis
Attachment: Excel file with hyperlinks to suspicious domains
6h ago
Oct 6th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Free file host
Free subdomain host
Social engineering
Natural Language Understanding
Content analysis
Exif analysis
File analysis
URL analysis
BEC/Fraud
Credential Phishing
Free file host
Free subdomain host
Social engineering
Natural Language Understanding
Content analysis
Exif analysis
File analysis
URL analysis
Observed IOC: Malicious domains in body links
6h ago
Oct 6th, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Link: Possible Intuit link abuse
1d ago
Oct 5th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
URL analysis
Natural Language Understanding
Content analysis
Header analysis
Credential Phishing
Impersonation: Brand
Social engineering
URL analysis
Natural Language Understanding
Content analysis
Header analysis
Observed IOC: Malicious root domains in body links
1d ago
Oct 5th, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Credential Phishing
Malware/Ransomware
Evasion
Social engineering
URL analysis
Content analysis
Attachment: Microsoft OAuth credential harvesting via EML with embedded malicious links
2d ago
Oct 4th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Evasion
PDF
File analysis
URL analysis
Content analysis
Credential Phishing
Impersonation: Brand
Evasion
PDF
File analysis
URL analysis
Content analysis
Credential phishing: Generic document sharing
2d ago
Oct 4th, 2026
Sublime Security
Credential Phishing
BEC/Fraud
Social engineering
Evasion
Impersonation: Employee
Content analysis
Natural Language Understanding
URL analysis
Sender analysis
Credential Phishing
BEC/Fraud
Social engineering
Evasion
Impersonation: Employee
Content analysis
Natural Language Understanding
URL analysis
Sender analysis
Attachment: ICS with Suspicious Office 365 app authorization (OAuth) link
2d ago
Oct 4th, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
ICS Phishing
File analysis
Content analysis
URL analysis
Credential Phishing
Evasion
Social engineering
ICS Phishing
File analysis
Content analysis
URL analysis
Attachment: Suspicious use of Unicode tag characters in ICS File
2d ago
Oct 4th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
Evasion: Suspicious use of Unicode tag characters
2d ago
Oct 4th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
BEC/Fraud
Credential Phishing
Evasion
Social engineering
Content analysis
HTML analysis
Header analysis
Service abuse: Microsoft Power Apps callback scam
4d ago
Oct 2nd, 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
Spam: Fake photo share
4d ago
Oct 2nd, 2026
Sublime Security
Spam
Evasion
Social engineering
Content analysis
Sender analysis
URL analysis
Whois
Spam
Evasion
Social engineering
Content analysis
Sender analysis
URL analysis
Whois
Body: Bid solicitation PDF lure
4d ago
Oct 2nd, 2026
Sublime Security
BEC/Fraud
Social engineering
Content analysis
HTML analysis
BEC/Fraud
Social engineering
Content analysis
HTML analysis
Page 1 of 25

Rule Name & Severity	Last Updated	Author	Types, Tactics & Capabilities
BEC/Fraud: Fake investment outreach from suspicious TLD	38m ago Oct 6th, 2026	Sublime Security	BEC/Fraud Social engineering Header analysis Sender analysis Content analysis Natural Language Understanding
Fake voicemail notification (untrusted sender)	1h ago Oct 6th, 2026	Sublime Security	Credential Phishing Social engineering Content analysis Natural Language Understanding Sender analysis URL analysis
Link: Google Cloud Storage /index and /unsub link pair	4h ago Oct 6th, 2026	Sublime Security	Spam Free file host Social engineering URL analysis Content analysis
Link: Malformed subdomain ending in hyphen	5h ago Oct 6th, 2026	Sublime Security	Credential Phishing Social engineering Lookalike domain Impersonation: Brand Impersonation: Employee URL analysis Content analysis
Link: Google Cloud Storage with short-path link delivery	5h ago Oct 6th, 2026	Sublime Security	Spam Credential Phishing Free file host Evasion Social engineering Impersonation: Brand URL analysis Content analysis
Service Abuse: American Express callback scam	5h ago Oct 6th, 2026	Sublime Security	Callback Phishing Impersonation: Brand Social engineering Natural Language Understanding Content analysis Sender analysis
Link: Observed URL path (lht) with recipient email address	5h ago Oct 6th, 2026	Sublime Security	Credential Phishing Social engineering Impersonation: Brand Evasion Spoofing URL analysis Content analysis Header analysis
Service abuse: Lovable-hosted redirect to external phishing page	6h ago Oct 6th, 2026	Sublime Security	Credential Phishing Social engineering Open redirect Free subdomain host URL analysis HTML analysis Content analysis
Attachment: Excel file with hyperlinks to suspicious domains	6h ago Oct 6th, 2026	Sublime Security	BEC/Fraud Credential Phishing Free file host Free subdomain host Social engineering Natural Language Understanding Content analysis Exif analysis File analysis URL analysis
Observed IOC: Malicious domains in body links	6h ago Oct 6th, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion Social engineering URL analysis Content analysis
Link: Possible Intuit link abuse	1d ago Oct 5th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering URL analysis Natural Language Understanding Content analysis Header analysis
Observed IOC: Malicious root domains in body links	1d ago Oct 5th, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion Social engineering URL analysis Content analysis
Attachment: Microsoft OAuth credential harvesting via EML with embedded malicious links	2d ago Oct 4th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Evasion PDF File analysis URL analysis Content analysis
Credential phishing: Generic document sharing	2d ago Oct 4th, 2026	Sublime Security	Credential Phishing BEC/Fraud Social engineering Evasion Impersonation: Employee Content analysis Natural Language Understanding URL analysis Sender analysis
Attachment: ICS with Suspicious Office 365 app authorization (OAuth) link	2d ago Oct 4th, 2026	Sublime Security	Credential Phishing Evasion Social engineering ICS Phishing File analysis Content analysis URL analysis
Attachment: Suspicious use of Unicode tag characters in ICS File	2d ago Oct 4th, 2026	Sublime Security	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Evasion: Suspicious use of Unicode tag characters	2d ago Oct 4th, 2026	Sublime Security	BEC/Fraud Credential Phishing Evasion Social engineering Content analysis HTML analysis Header analysis
Service abuse: Microsoft Power Apps callback scam	4d ago Oct 2nd, 2026	Sublime Security	Callback Phishing Impersonation: Brand Out of band pivot Social engineering Content analysis Natural Language Understanding Sender analysis
Spam: Fake photo share	4d ago Oct 2nd, 2026	Sublime Security	Spam Evasion Social engineering Content analysis Sender analysis URL analysis Whois
Body: Bid solicitation PDF lure	4d ago Oct 2nd, 2026	Sublime Security	BEC/Fraud Social engineering Content analysis HTML analysis