Sublime Security

Sublime Core Feed
Sender 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: 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
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
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
Talking phish over turkey · 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
Attack Types (7):
Callback Phishing
Credential Phishing
Malware/Ransomware
BEC/Fraud
Spam
Extortion
Reconnaissance
Tactics & Techniques (25):
Impersonation: Brand
Social engineering
Lookalike domain
Spoofing
Evasion
Impersonation: Email address
HTML smuggling
Free file host
Impersonation: Domain
Out of band pivot
Impersonation: VIP
Open redirect
Free email provider
Encryption
PDF
Impersonation: Employee
Image as content
QR code
Free subdomain host
ICS Phishing
Exploit
Scripting
OneNote
LNK
Macros
Rule Name & Severity
Last Updated
Types, Tactics & Capabilities
Brand impersonation: QuickBooks
3h ago
Oct 26th, 2026
Sublime Security
Callback Phishing
Credential Phishing
Impersonation: Brand
Social engineering
Computer Vision
Content analysis
Header analysis
Sender analysis
Callback Phishing
Credential Phishing
Impersonation: Brand
Social engineering
Computer Vision
Content analysis
Header analysis
Sender analysis
Link: Multistage landing - Abused Adobe Acrobat hosted PDF
3h ago
Oct 26th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Computer Vision
Optical Character Recognition
URL analysis
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Computer Vision
Optical Character Recognition
URL analysis
Header analysis
Sender analysis
Brand impersonation: Meta and subsidiaries
3h ago
Oct 26th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Lookalike domain
Social engineering
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Lookalike domain
Social engineering
Header analysis
Sender analysis
Brand impersonation: American Express (AMEX)
4h ago
Oct 26th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Lookalike domain
Social engineering
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Lookalike domain
Social engineering
Header analysis
Sender analysis
Brand impersonation: Amazon
4h ago
Oct 26th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Header analysis
Sender analysis
Brand impersonation: Federal court system
4h ago
Oct 26th, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Spoofing
Natural Language Understanding
Content analysis
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Spoofing
Natural Language Understanding
Content analysis
Header analysis
Sender analysis
Spamhaus: Mail transiting an ASN-DROP listed network
8h ago
Oct 26th, 2026
Sublime Security
Malware/Ransomware
Credential Phishing
BEC/Fraud
Evasion
Social engineering
Header analysis
Sender analysis
Malware/Ransomware
Credential Phishing
BEC/Fraud
Evasion
Social engineering
Header analysis
Sender analysis
Spamhaus: Mail transiting a DROP listed network
8h ago
Oct 26th, 2026
Sublime Security
Malware/Ransomware
Credential Phishing
BEC/Fraud
Evasion
Social engineering
Header analysis
Sender analysis
Malware/Ransomware
Credential Phishing
BEC/Fraud
Evasion
Social engineering
Header analysis
Sender analysis
Observed IOC: Mail transiting OFAC-sanctioned bulletproof host Aeza Group
8h ago
Oct 26th, 2026
Sublime Security
Malware/Ransomware
Credential Phishing
BEC/Fraud
Evasion
Social engineering
Header analysis
Sender analysis
Malware/Ransomware
Credential Phishing
BEC/Fraud
Evasion
Social engineering
Header analysis
Sender analysis
Observed IOC: Malicious sender email addresses
8h ago
Oct 26th, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Malware/Ransomware
Social engineering
Sender analysis
Header analysis
BEC/Fraud
Credential Phishing
Malware/Ransomware
Social engineering
Sender analysis
Header analysis
Credential phishing: Financial lure via ActiveCampaign infrastructure
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Credential Phishing
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Sender analysis
Attachment: EML file with HTML attachment (unsolicited)
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
Malware/Ransomware
Evasion
HTML smuggling
Content analysis
File analysis
Header analysis
HTML analysis
Sender analysis
Credential Phishing
Malware/Ransomware
Evasion
HTML smuggling
Content analysis
File analysis
Header analysis
HTML analysis
Sender analysis
Brand impersonation: Dropbox
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
File analysis
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Content analysis
File analysis
Header analysis
Sender analysis
Brand impersonation: Google Workspace alert notification
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Lookalike domain
Header analysis
Content analysis
Sender analysis
URL analysis
Credential Phishing
Impersonation: Brand
Social engineering
Lookalike domain
Header analysis
Content analysis
Sender analysis
URL analysis
Brand impersonation: Bluehost
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
Impersonation: Brand
Social engineering
Natural Language Understanding
Header analysis
Sender analysis
Credential Phishing
Impersonation: Brand
Social engineering
Natural Language Understanding
Header analysis
Sender analysis
Link: Zoho form link from unsolicited sender
4d ago
Oct 23rd, 2026
Sublime Security
Callback Phishing
Free file host
Content analysis
URL analysis
Sender analysis
Callback Phishing
Free file host
Content analysis
URL analysis
Sender analysis
Observed IOC: Malicious sender root domains
4d ago
Oct 23rd, 2026
Sublime Security
BEC/Fraud
Credential Phishing
Malware/Ransomware
Social engineering
Sender analysis
Header analysis
BEC/Fraud
Credential Phishing
Malware/Ransomware
Social engineering
Sender analysis
Header analysis
Service abuse: Microsoft messaging with Cloudflare Turnstile-gated link
4d ago
Oct 23rd, 2026
Sublime Security
Credential Phishing
Evasion
Social engineering
URL analysis
Content analysis
Sender analysis
Credential Phishing
Evasion
Social engineering
URL analysis
Content analysis
Sender analysis
BEC/Fraud: Fake investment outreach from suspicious TLD
5d ago
Oct 22nd, 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
Spam: Large financial amount mention from newly registered sender domain
5d ago
Oct 22nd, 2026
Sublime Security
BEC/Fraud
Spam
Social engineering
Content analysis
Sender analysis
Whois
BEC/Fraud
Spam
Social engineering
Content analysis
Sender analysis
Whois
Page 1 of 25

Rule Name & Severity	Last Updated	Author	Types, Tactics & Capabilities
Brand impersonation: QuickBooks	3h ago Oct 26th, 2026	Sublime Security	Callback Phishing Credential Phishing Impersonation: Brand Social engineering Computer Vision Content analysis Header analysis Sender analysis
Link: Multistage landing - Abused Adobe Acrobat hosted PDF	3h ago Oct 26th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Computer Vision Optical Character Recognition URL analysis Header analysis Sender analysis
Brand impersonation: Meta and subsidiaries	3h ago Oct 26th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Lookalike domain Social engineering Header analysis Sender analysis
Brand impersonation: American Express (AMEX)	4h ago Oct 26th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Lookalike domain Social engineering Header analysis Sender analysis
Brand impersonation: Amazon	4h ago Oct 26th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Header analysis Sender analysis
Brand impersonation: Federal court system	4h ago Oct 26th, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Spoofing Natural Language Understanding Content analysis Header analysis Sender analysis
Spamhaus: Mail transiting an ASN-DROP listed network	8h ago Oct 26th, 2026	Sublime Security	Malware/Ransomware Credential Phishing BEC/Fraud Evasion Social engineering Header analysis Sender analysis
Spamhaus: Mail transiting a DROP listed network	8h ago Oct 26th, 2026	Sublime Security	Malware/Ransomware Credential Phishing BEC/Fraud Evasion Social engineering Header analysis Sender analysis
Observed IOC: Mail transiting OFAC-sanctioned bulletproof host Aeza Group	8h ago Oct 26th, 2026	Sublime Security	Malware/Ransomware Credential Phishing BEC/Fraud Evasion Social engineering Header analysis Sender analysis
Observed IOC: Malicious sender email addresses	8h ago Oct 26th, 2026	Sublime Security	BEC/Fraud Credential Phishing Malware/Ransomware Social engineering Sender analysis Header analysis
Credential phishing: Financial lure via ActiveCampaign infrastructure	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing Social engineering Content analysis Header analysis Natural Language Understanding Sender analysis
Attachment: EML file with HTML attachment (unsolicited)	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing Malware/Ransomware Evasion HTML smuggling Content analysis File analysis Header analysis HTML analysis Sender analysis
Brand impersonation: Dropbox	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Content analysis File analysis Header analysis Sender analysis
Brand impersonation: Google Workspace alert notification	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Lookalike domain Header analysis Content analysis Sender analysis URL analysis
Brand impersonation: Bluehost	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing Impersonation: Brand Social engineering Natural Language Understanding Header analysis Sender analysis
Link: Zoho form link from unsolicited sender	4d ago Oct 23rd, 2026	Sublime Security	Callback Phishing Free file host Content analysis URL analysis Sender analysis
Observed IOC: Malicious sender root domains	4d ago Oct 23rd, 2026	Sublime Security	BEC/Fraud Credential Phishing Malware/Ransomware Social engineering Sender analysis Header analysis
Service abuse: Microsoft messaging with Cloudflare Turnstile-gated link	4d ago Oct 23rd, 2026	Sublime Security	Credential Phishing Evasion Social engineering URL analysis Content analysis Sender analysis
BEC/Fraud: Fake investment outreach from suspicious TLD	5d ago Oct 22nd, 2026	Sublime Security	BEC/Fraud Social engineering Header analysis Sender analysis Content analysis Natural Language Understanding
Spam: Large financial amount mention from newly registered sender domain	5d ago Oct 22nd, 2026	Sublime Security	BEC/Fraud Spam Social engineering Content analysis Sender analysis Whois