Cyber Risks · Krebs on Security

Cyberheist Smokescreen: Email, Phone, SMS Floods

Summary: In October 2011, Brian Krebs's Gmail inbox received tens of thousands of junk messages over roughly six hours, burying hundreds of legitimate emails, and a week later he found a criminal forum ad selling automated email floods at $25 for 25,000 messages up to $70 for 100,000, with a claimed 60-65% delivery rate. The same seller offered call flooding at $1.50 per number per hour or $20 per day and SMS blasts at $5 per 100 messages, services pitched at blocking a business's phone lines and inboxes so bank transfer alerts never arrive.

Bottom line: A flood costing tens of dollars can bury the text, email or phone call your bank uses to confirm a high-dollar transfer, and Krebs notes a DDoS attack on a company website would add only about $50 a day to the total.

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Topics
Data Breaches
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