A gang of organized cyber criminals that has stolen millions from businesses across the United States over the past month appears to have turned its sights on public schools and universities.

On the morning of Aug. 17, hackers who had broken into computers at the Sanford School District in tiny Sanford, Colorado initiated a batch of bogus transfers out of the school's payroll account. Each of the transfers was kept just below $10,000 to avoid banks' anti-money laundering reporting requirements, and went out to at least 17 different accomplices or "money mules" that the attackers had hired via work-at-home job scams.

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