Hackers have stolen the login credentials for more than 8,300 customers of small New York bank after breaching its security and accessing a server that hosted its online banking system.

The intrusion at Suffolk County National Bank happened over a six-day period that started on November 18, according to a release (PDF) issued Monday. It was discovered on December 24 during an internal security review. In all, credentials 8,378 online accounts were pilfered, a number that represents less than 10 percent of SCNB’s total. “Although the intrusion was limited in duration and scope, SCNB immediately isolated and rebuilt the compromised server and took other measures to ensure the security of data on the server,” the bank, located about an hour east of New York City, stated. “To date, SCNB has found no evidence of any unauthorized access to online banking accounts, nor received any reports of unusual activity or reports of financial loss to its customers.”

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