• Spam

Attack Type: Spam

Spam refers to bulk, unsolicited messages, often promoting questionable offers, fake opportunities, or irrelevant content you never asked for. These messages typically ignore basic rules around consent and use shady tactics to sneak past filters, like misspelled words (“W1NNER,” “FREEBlE”) or fake brand names that look close to the real thing (“L0WES,” “C0STC0”).
You’ve probably seen examples: work-from-home schemes with unrealistic pay, miracle health products, SEO pitches warning about your website, or companies pushing “verified” contact lists. Some spam even pretends to be part of an ongoing thread by adding fake “RE:” or “FWD:” subject lines.
Even when the emails look polished or pass authentication checks, they’re often filled with misleading claims, fake urgency, or vague references to prior contact. While not always malicious, spam clutters inboxes, wastes time, and occasionally serves as a delivery method for more serious threats.
Detection Methods (10):
Content analysis
Sender analysis
Header analysis
URL analysis
Whois
Natural Language Understanding
Optical Character Recognition
HTML analysis
Computer Vision
Exif analysis
Rule Name & Severity
Last Updated
Author
Types, Tactics & Capabilities
Spam: Attendee List solicitation
9d ago
May 14th, 2025
Sublime Security
Spam
Content analysis
Sender analysis
/feeds/core/detection-rules/spam-attendee-list-solicitation-69715b62
Service Abuse: Adobe Sign Notification From an Unsolicited Reply-To Address
23d ago
Apr 30th, 2025
Sublime Security
BEC/Fraud
Callback Phishing
Spam
Social engineering
Impersonation: Brand
Header analysis
Sender analysis
/feeds/core/detection-rules/service-abuse-adobe-sign-notification-from-an-unsolicited-reply-to-address-d00893ba
Spam: Fake photo share
1mo ago
Apr 16th, 2025
Sublime Security
Spam
Evasion
Social engineering
Content analysis
Sender analysis
URL analysis
Whois
/feeds/core/detection-rules/spam-fake-photo-share-eb086f7d
Brand Impersonation: SendGrid
1mo ago
Apr 15th, 2025
Sublime Security
BEC/Fraud
Credential Phishing
Spam
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Natural Language Understanding
Optical Character Recognition
Sender analysis
/feeds/core/detection-rules/brand-impersonation-sendgrid-d800124f
Brand Impersonation: Vanguard
1mo ago
Apr 11th, 2025
Sublime Security
BEC/Fraud
Callback Phishing
Credential Phishing
Extortion
Malware/Ransomware
Spam
Impersonation: Brand
Natural Language Understanding
Header analysis
Sender analysis
/feeds/core/detection-rules/brand-impersonation-vanguard-3bd048fe
Link: Squarespace Infrastructure Abuse
1mo ago
Apr 1st, 2025
Sublime Security
Credential Phishing
Spam
Impersonation: Brand
Social engineering
Header analysis
URL analysis
Sender analysis
/feeds/core/detection-rules/link-squarespace-infrastructure-abuse-a8fe9d30
Open Redirect: Cartoon Network
2mo ago
Mar 18th, 2025
Sublime Security
Credential Phishing
Spam
Open redirect
Evasion
Content analysis
URL analysis
/feeds/core/detection-rules/open-redirect-cartoon-network-7435e057
Brand Impersonation: WeTransfer
2mo ago
Mar 12th, 2025
Sublime Security
BEC/Fraud
Callback Phishing
Credential Phishing
Extortion
Malware/Ransomware
Spam
Impersonation: Brand
Content analysis
Header analysis
Sender analysis
/feeds/core/detection-rules/brand-impersonation-wetransfer-e37885ad
Suspicious subject with long procedurally generated text blob
2mo ago
Mar 12th, 2025
Sublime Security
Credential Phishing
Spam
Evasion
Content analysis
Sender analysis
/feeds/core/detection-rules/suspicious-subject-with-long-procedurally-generated-text-blob-e819593d
BEC/Fraud: Urgent Language and Suspicious Sending/Infrastructure Patterns
2mo ago
Mar 10th, 2025
Sublime Security
BEC/Fraud
Callback Phishing
Spam
Impersonation: Brand
Social engineering
Free email provider
Content analysis
Header analysis
Sender analysis
Whois
/feeds/core/detection-rules/becfraud-urgent-language-and-suspicious-sendinginfrastructure-patterns-ba8a79e0
Spam: Image as content with Hidden HTML Element
2mo ago
Mar 3rd, 2025
Sublime Security
Spam
Evasion
Image as content
Content analysis
HTML analysis
Sender analysis
/feeds/core/detection-rules/spam-image-as-content-with-hidden-html-element-5de8861f
Unusually Long Local Part From Untrusted Sender Address
2mo ago
Feb 24th, 2025
Sublime Security
Credential Phishing
Spam
Evasion
Header analysis
Sender analysis
/feeds/core/detection-rules/unusually-long-local-part-from-untrusted-sender-address-91a9cd45
Twitter infrastructure abuse via link shortener
3mo ago
Feb 6th, 2025
Sublime Security
Credential Phishing
Malware/Ransomware
Spam
Evasion
Impersonation: Brand
Social engineering
Content analysis
Sender analysis
URL analysis
/feeds/core/detection-rules/twitter-infrastructure-abuse-via-link-shortener-99ca165e
Brand impersonation: Hulu
3mo ago
Feb 4th, 2025
Sublime Security
Credential Phishing
Spam
Free email provider
Impersonation: Brand
Lookalike domain
Social engineering
Computer Vision
Header analysis
Sender analysis
/feeds/core/detection-rules/brand-impersonation-hulu-6833de58
Spam: Sexually Explicit Google Group Invitation
4mo ago
Jan 16th, 2025
Sublime Security
Spam
Free email provider
Social engineering
Content analysis
Sender analysis
/feeds/core/detection-rules/spam-sexually-explicit-google-group-invitation-4e0bec29
Spam: Sexually Explicit Looker Studio Report
4mo ago
Jan 16th, 2025
Sublime Security
Spam
Social engineering
Free email provider
Content analysis
Sender analysis
/feeds/core/detection-rules/spam-sexually-explicit-looker-studio-report-f1e649cd
Spam: Default Microsoft Exchange Online sender domain (onmicrosoft.com)
4mo ago
Jan 10th, 2025
Sublime Security
Callback Phishing
Credential Phishing
Spam
Free email provider
Impersonation: Brand
Social engineering
Content analysis
Sender analysis
/feeds/core/detection-rules/spam-default-microsoft-exchange-online-sender-domain-onmicrosoftcom-3f2a64ce
Brand Impersonation: SiriusXM
4mo ago
Jan 9th, 2025
Sublime Security
Callback Phishing
Credential Phishing
Spam
Free email provider
Impersonation: Brand
Social engineering
Content analysis
Header analysis
Sender analysis
/feeds/core/detection-rules/brand-impersonation-siriusxm-70eb3792
Spam: Item Giveaway Spam Template
4mo ago
Jan 8th, 2025
Sublime Security
Spam
Image as content
Content analysis
HTML analysis
Sender analysis
Exif analysis
/feeds/core/detection-rules/spam-item-giveaway-spam-template-06a5f93b
Brand impersonation: KnowBe4
5mo ago
Nov 25th, 2024
Sublime Security
Credential Phishing
Spam
Free email provider
Impersonation: Brand
Lookalike domain
Social engineering
Computer Vision
Header analysis
Sender analysis
/feeds/core/detection-rules/brand-impersonation-knowbe4-7c798386