Detection Method: Sender analysis

Sender analysis helps you assess whether an email is coming from a legitimate sender. By combining machine learning and rules-based logic, this method evaluates sender profiles, looking at things like authentication results, past behavior, and patterns from previous messages.
Sender analysis can help you detect:
  • Impersonation attempts using fake email addresses or domains
  • Suspicious senders with authentication issues (e.g., SPF, DKIM, DMARC failures)
  • Unusual behavior based on historical patterns, like frequent urgent requests
  • Senders linked to known phishing or malware campaigns
  • Changes in sender behavior that could indicate a compromised account
For example, an attacker might try to impersonate a trusted vendor or executive. The email address or domain might look real, but sender analysis can catch issues like failed authentication checks or past suspicious activity, helping you spot these threats before they do damage.
Blog Posts
Credential phishing Charles Schwab account holders with 2FA bypass · Blog · Sublime Security
Credential phishing Charles Schwab account holders with 2FA bypass · Blog · Sublime Security
Hiding a $50,000 BEC financial fraud in a fake email thread · Blog · Sublime Security
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
Callback phishing via invoice abuse and distribution list relays · Blog · Sublime Security
B2B freight-forwarding scams on the rise to evade financial fraud crackdowns · Blog · Sublime Security
B2B freight-forwarding scams on the rise to evade financial fraud crackdowns · Blog · Sublime Security
Detecting malicious AnonymousFox email messages sent from compromised sites · Blog · Sublime Security
Detecting malicious AnonymousFox email messages sent from compromised sites · Blog · Sublime Security
Talking phish over turkey · Blog · Sublime Security
Talking phish over turkey · Blog · Sublime Security
Hidden credential phishing within EML attachments · 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: Credential Phishing via Docusign abuse · Blog · Sublime Security
Living Off the Land: Callback Phishing via Docusign comment · 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
Adversarial ML: Extortion via LLM Manipulation Tactics · Blog · Sublime Security
Attack Types (7):
Credential Phishing
BEC/Fraud
Callback Phishing
Spam
Malware/Ransomware
Extortion
Reconnaissance
Tactics & Techniques (24):
Impersonation: Brand
Lookalike domain
Social engineering
Spoofing
Free email provider
Evasion
Free subdomain host
Open redirect
PDF
QR code
Image as content
Out of band pivot
Free file host
Encryption
Impersonation: VIP
Impersonation: Employee
OneNote
Scripting
HTML smuggling
Exploit
Macros
IPFS
LNK
Punycode
Rule Name & Severity
Last Updated
Author
Types, Tactics & Capabilities
Brand impersonation: DocuSign
3d ago
Apr 17th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Lookalike domain
Social engineering
Spoofing
Header analysis
Sender analysis
URL analysis
BEC/Fraud: Urgent language and suspicious sending/infrastructure patterns
3d ago
Apr 17th, 2026
Sublime Security
BEC/Fraud
Callback Phishing
Spam
Impersonation: Brand
Social engineering
Free email provider
Content analysis
Header analysis
Sender analysis
Whois
Self-sender with copy/paste instructions and suspicious domains (French/Français)
4d ago
Apr 16th, 2026
Sublime Security
Credential Phishing
Evasion
Free subdomain host
Social engineering
Content analysis
Header analysis
Sender analysis
Brand impersonation: Wells Fargo
5d ago
Apr 15th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Lookalike domain
Social engineering
Content analysis
Sender analysis
Service abuse: Meetup.com redirect with brand impersonation
5d ago
Apr 15th, 2026
Sublime Security
Credential Phishing
Open redirect
Impersonation: Brand
Evasion
URL analysis
HTML analysis
Content analysis
Sender analysis
Credential phishing: 'Secure message' and engaging language
5d ago
Apr 15th, 2026
Sublime Security
Credential Phishing
Social engineering
Natural Language Understanding
Sender analysis
Brand impersonation: Amazon with suspicious attachment
6d ago
Apr 14th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Computer Vision
File analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
Advance Fee Fraud (AFF) from freemail provider or suspicious TLD
6d ago
Apr 14th, 2026
Sublime Security
BEC/Fraud
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Spam: Website errors solicitation
6d ago
Apr 14th, 2026
Sublime Security
Spam
Content analysis
Sender analysis
Natural Language Understanding
Attachment: Compensation review lure with QR code
6d ago
Apr 14th, 2026
Sublime Security
Credential Phishing
PDF
QR code
Social engineering
File analysis
Optical Character Recognition
QR code analysis
Natural Language Understanding
Sender analysis
Header analysis
Brand impersonation: USPS
7d ago
Apr 13th, 2026
Sublime Security
Credential Phishing
Image as content
Impersonation: Brand
Social engineering
Computer Vision
Content analysis
Natural Language Understanding
Sender analysis
Callback phishing via Microsoft comment
7d ago
Apr 13th, 2026
Sublime Security
Callback Phishing
Impersonation: Brand
Out of band pivot
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Cloud storage impersonation with credential theft indicators
11d ago
Apr 9th, 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
Brand impersonation: McAfee
11d ago
Apr 9th, 2026
Sublime Security
Credential Phishing
BEC/Fraud
Callback Phishing
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Attachment: Encrypted PDF with credential theft body
11d ago
Apr 9th, 2026
Sublime Security
Credential Phishing
Encryption
Evasion
PDF
Social engineering
Content analysis
Exif analysis
File analysis
Natural Language Understanding
Sender analysis
Callback phishing via Apple ID display name abuse
12d ago
Apr 8th, 2026
Sublime Security
Callback Phishing
Impersonation: Brand
Out of band pivot
Social engineering
Content analysis
Natural Language Understanding
Sender analysis
Service abuse: GitHub notification with excessive mentions and suspicious links
13d ago
Apr 7th, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Free file host
Free subdomain host
Social engineering
Header analysis
URL analysis
Sender analysis
Whois
Link: Job recruitment lure from unsolicited sender with suspicious hosting
13d ago
Apr 7th, 2026
Sublime Security
Credential Phishing
Social engineering
Content analysis
Sender analysis
URL analysis
Brand impersonation: Zoom via lookalike domain
13d ago
Apr 7th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Free email provider
Social engineering
URL analysis
Sender analysis
QR Code with suspicious indicators
14d ago
Apr 6th, 2026
Sublime Security
Credential Phishing
QR code
Social engineering
Content analysis
Header analysis
Computer Vision
Natural Language Understanding
QR code analysis
Sender analysis
URL analysis
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