Hackers have leaked files online containing data on thousands of customers of Sharjah-based Investbank UAE. The files were stolen last December when an individual tried to blackmail the bank for $3 million. When the bank refused to pay, the hacker threatened to dump the stolen files online, yet they never appeared. Security expert Mohammad Amin Hasbini warned that the hackers are going to release data from a second attack. According to Softpedia, the hacker group is Bozkurtlar, the same group that claimed responsibility for the Qatar National Bank data breach two weeks ago.