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Michaels Stores (finally) confirms breach affecting 2.6M cards at Michaels, 400K at Aaron Brothers

Posted on April 17, 2014 by Dissent

Michaels Stores, who announced on January 25 that they had been informed of a possible breach that they were investigating, has now (finally) confirmed the breach first reported by Brian Krebs. Posted on their web site today:

In January, we notified you that we might have experienced a data security incident. We wanted you to know quickly so you could take steps to monitor activity on your payment card account.

Since that time, we have continued our extensive investigation with the help of two independent, expert security firms. We have also been working closely with law enforcement authorities and coordinating with banks and payment processors to determine the facts.

After weeks of analysis, we have discovered evidence confirming that systems of Michaels stores in the United States and our subsidiary, Aaron Brothers, were attacked by criminals using highly sophisticated malware that had not been encountered previously by either of the security firms.

We want you to know we have identified and fully contained the incident, and we can assure you the malware no longer presents a threat to customers while shopping at Michaels or Aaron Brothers.

Here are additional facts we have determined from our continuing investigation:

  • The affected systems contained certain payment card information, such as payment card number and expiration date, about both Michaels and Aaron Brothers customers. There is no evidence that other customer personal information, such as name, address or PIN, was at risk in connection with this issue.
  • Regarding Michaels stores, the attack targeted a limited portion of the point-of-sale systems at a varying number of stores between May 8, 2013 and January 27, 2014. Only a small percentage of payment cards used in the affected stores during the times of exposure were impacted by this issue. The analysis conducted by the security firms and the Company shows that approximately 2.6 million cards may have been impacted, which represents about 7% of payment cards used at Michaels stores in the U.S. during the relevant time period. The locations and potential dates of exposure for each affected Michaels store are listed on www.michaels.com.
  • Regarding Aaron Brothers, the Company has confirmed that between June 26, 2013 and February 27, 2014, 54 Aaron Brothers stores were affected by this malware. The Company estimates that approximately 400,000 cards were potentially impacted during this period. The locations for each affected Aaron Brothers store are listed on www.aaronbrothers.com.
  • The Company has received a limited number of reports from the payment card brands and banks of fraudulent use of payment cards potentially connected to Michaels or Aaron Brothers.

[…]

Read their CEO’s full statement here.  The companion press release can be found here.

Affected Aaron Brothers’ stores
Affected Michaels stores

And yes, the Michaels store I used my card at was involved, but damned if I remember what dates I used the card on. I guess I’ll have to wait to see if I get a notification letter from the card issuer.

Post corrected to delete incorrect date of Brian Kreb’s disclosure of breach.

 

Category: Business SectorMalwareU.S.

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