Module 4 · Business Email Compromise (BEC) — Four Variants and the Defender Stack
Manish GargAssociate of (ISC)² · RingSafe
May 14, 20264 min read
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No signup. No paywall. No catch.One of our 10 most-requested practitioner modules — published in full so anyone can learn for free. We earn through consulting, not by gating knowledge.
Why this module exists. Business Email Compromise — the wire-fraud scheme where attackers impersonate executives or vendors and instruct money movement — is the single most financially damaging cybercrime against Indian enterprises. The IC3 records BEC losses worldwide at ~$50B over the last decade. Indian losses are under-reported but follow the same patterns. This module is the pattern catalogue and the defender controls that actually stop the fraud.
Why this module exists. BEC does not need malware, credential theft, or AiTM phishing. It only needs to convince one finance person to send money to the wrong account. The defence is mostly process, not technology. This module is the practitioner pattern.
The four BEC variants
Variant
Attacker pose
Target
CEO fraud
CEO/CFO
Finance team member
Vendor invoice fraud
Compromised vendor
Accounts payable
Payroll diversion
Employee
HR / Payroll
Attorney impersonation
External counsel
Finance / legal team
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