Sources said some banks keep their ATM booths closed for eight hours from 11:00pm to 7:00am while some keep it suspended for six hours from 12:00am to avert any fraud.
According to official sources, the Bangladesh Bank alerted all commercial banks in a circular on August 27 about a possible threat of hacking in the banking transactions through ATM booth, credit cards and other modes of online banking.
"The alert was issued following global media reports that a North Korean hacker group is trying to hack different banks in various countries," said a Bangladesh Bank official.
Ekram Kabir, executive vice president (communications) of Brac Bank, said his bank keeps the ATM booth transactions suspended from 12:00am to 6:00am following the central bank's alert.
He said every debit card holder of the bank was notified about the move.
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