Target: Attacks Continued After Dec. 15

Target CFO John Mulligan’s included the revelation in his testimony for an appearance before the Senate Judiciary Committee. He wrote that 25 POS machines were discovered to be infected by the malware after December 15, when the company publicly declared that the attack was over.

The attack continued for three additional days, he said, according to the Wall Street Journal.

Mulligan also acknowledged that the malware appeared to be “custom-built” for the attack.

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