Attack Type: BEC/Fraud

Business Email Compromise (BEC) and fraud attacks rely on deception and social engineering. Instead of using links or attachments, attackers impersonate trusted figures like coworkers, executives, or vendors to trick you into sharing sensitive information or transferring funds. These attacks can bypass traditional security tools because the emails often seem harmless.
Expect fake invoices, urgent wire transfer requests, or a vendor asking you to update payment details. The first email is usually brief—just enough to start a conversation. The attacker might spoof a display name, reply to an old thread, or ask you to continue the conversation via personal email or phone. That is often the giveaway.
Even though these attacks may appear low-effort, the impact can be significant. They can lead to wire fraud, compliance violations, and damage to the organization's reputation. Organizations lose billions to BEC attacks each year.
Rule Name & Severity
Last Updated
Author
Types, Tactics & Capabilities
Headers: Reserved domain in Message-ID
3h ago
Oct 26th, 2026
Sublime Security
Observed IOC: Malicious sender email addresses
8h ago
Oct 26th, 2026
Sublime Security
Spamhaus: Mail transiting a DROP listed network
8h ago
Oct 26th, 2026
Sublime Security
Observed IOC: Mail transiting OFAC-sanctioned bulletproof host Aeza Group
8h ago
Oct 26th, 2026
Sublime Security
Spamhaus: Mail transiting an ASN-DROP listed network
8h ago
Oct 26th, 2026
Sublime Security
Attachment: Fake LinkedIn invoice PDF lure
4d ago
Oct 23rd, 2026
Sublime Security
Observed IOC: Malicious sender root domains
4d ago
Oct 23rd, 2026
Sublime Security
BEC/Fraud: Fake investment outreach from suspicious TLD
5d ago
Oct 22nd, 2026
Sublime Security
Spam: Large financial amount mention from newly registered sender domain
5d ago
Oct 22nd, 2026
Sublime Security
VIP impersonation: Invoice fraud with mobile device sign-off
5d ago
Oct 22nd, 2026
Sublime Security
Prompt injection: Body instructions addressed to an AI
6d ago
Oct 21st, 2026
Sublime Security
Prompt injection: Instructions to an AI in a calendar invite
6d ago
Oct 21st, 2026
Sublime Security
Prompt injection: Hidden instructions to an AI in body HTML
6d ago
Oct 21st, 2026
Sublime Security
VIP impersonation: Fake thread with name-in-brackets header artifact
6d ago
Oct 21st, 2026
Sublime Security
VIP impersonation: Payment handoff with VIP display name authored fake threads
6d ago
Oct 21st, 2026
Sublime Security
VIP impersonation: VIP payment redirect handoff via fake threads
6d ago
Oct 21st, 2026
Sublime Security
Attachment: GCPay blurred check PDF
7d ago
Oct 20th, 2026
Sublime Security
Attachment: PDF with Microsoft compensation lure
8d ago
Oct 19th, 2026
Sublime Security
Attachment: Re-stamped invoice PDF with IRS references from external sender
11d ago
Oct 16th, 2026
Sublime Security
VIP impersonation: VIP name within a delimited subject with fake previous threads
11d ago
Oct 16th, 2026
Sublime Security