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Continued: Target data breach timeline

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  • Last update: March 26, 2014 - 8:52 PM

Dec. 16: The company begins notifying payment processors and card networks.

Dec. 18: Target discovers and removes malware on 25 additional registers.

Dec. 18: Computer security blogger ­Brian Krebs posts a story saying Target is confronting a security breach.

Dec. 19: Target confirms that credit and debit card information of 40 million customers had been exposed.


Jan 10: Target announces that personal information of up to 70 million customers also was exposed.

Jan. 13: CEO Gregg Steinhafel apologizes to customers for the data breach in a televised interview with CNBC.


Feb. 4: Target CFO John Mulligan briefs the Senate Judiciary Committee on the data breach.

Feb. 5: Mulligan testifies before a House subcommittee.

Feb. 7: Fazio Mechanical Services, a Pennsylvania-based heating and air conditioning contractor hired by Target, is identified as the conduit through which cyberthieves breached Target’s payment system.

Feb. 26: Target reports 2013 financial results, including $61 million spent in the fourth quarter on costs related to the cybertheft.


March 5: Target announces the resignation of Beth Jacob as senior vice president and chief information officer.

March 13: Bloomberg Businessweek publishes an article that says Target IT security missed warning signs from its malware detection software.

March 26: Target CFO John Mulligan again testifies on Capitol Hill, this time to answer allegations that the company missed opportunities to stop the ­cyberthieves.


Sources: Senate Committee on Commerce, Science, and Transportation; Bloomberg Businessweek; Brian Krebs; Target Corp., Star Tribune

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