<h2>Why BEC Is So Effective</h2><p>Business Email Compromise attacks succeed not because of sophisticated malware, but because they exploit trust. An email that appears to come from your CEO, your CFO, or a trusted vendor bypasses most technical controls — because it often does come from a legitimate, compromised account.</p><p>The FBI's Internet Crime Complaint Center (IC3) consistently ranks BEC as the highest-loss cybercrime category, with losses exceeding $2.9 billion in 2023 alone.</p><h2>The Three BEC Attack Patterns</h2><h3>Account Takeover (ATO)</h3><p>The attacker compromises a legitimate email account — typically via phishing, credential stuffing, or OAuth token theft — and operates from within the victim's own email infrastructure. This is the most dangerous variant because it bypasses sender authentication controls entirely.</p><h3>Domain Spoofing</h3><p>The attacker registers a lookalike domain (acme-corp.com instead of acmecorp.com) and sends emails that appear legitimate to casual inspection. Effective DMARC enforcement on the target domain significantly reduces this risk.</p><h3>Display Name Spoofing</h3><p>The attacker sends from an unrelated domain but sets the display name to match a trusted contact. This is the simplest technique and is often used in high-volume campaigns targeting accounts payable teams.</p><h2>The Investigation Workflow</h2><p>When a BEC incident is suspected, the investigation must move fast — wire transfers can sometimes be recalled if the bank is notified within hours. The immediate priorities are:</p><ol><li>Revoke all active sessions for the suspected compromised account</li><li>Identify all emails sent from the account during the compromise window</li><li>Determine whether any wire transfers, payment changes, or data requests were actioned</li><li>Contact your financial institution immediately if funds were transferred</li></ol><h2>Forensic Email Analysis</h2><p>Email headers tell the full story of a BEC attack. The Received headers reveal the true sending infrastructure, X-Originating-IP identifies the attacker's access point, and authentication results (SPF, DKIM, DMARC) confirm whether the email was spoofed or sent from a compromised account.</p><p>SpiderIQ's DF&IR team uses specialised O365/Google Workspace forensic tooling to reconstruct the full compromise timeline, identify all attacker activity, and produce court-admissible evidence packages for law enforcement referral.</p>