The company added that the cards were used for in-store purchases, and there is "no indication" online purchases were affected.
Of the records already released for sale, it's believed that approximately 35,000 records came frmo Saks Fifth Avenue and 90,000 records came from Lord & Taylor stores. The company said it was investigating and taking steps to contain the attack.
'In addition, we identified three potentially compromised stores located in Ontario, Canada.
All of the US locations of the retail chains have been compromised, the company said, with the majority of stolen credit card information coming from stores in NY and New Jersey.
Alex Holden, chief information security officer with cyber security firm Hold Security, confirmed that the 125,000 cards had been released by JokerStash but said it was too soon to estimate how many had been taken from Hudson's Bay. HBC wanted to reach out to customers quickly to assure them that they will not be liable for fraudulent charges that may result from this matter.
But the researchers, working in conjunction with banks, analyzed a sample of the records and determined that the card numbers all seemed to have been used at Saks and Lord & Taylor stores, mostly in NY and New Jersey, from May 2017 to March 2018.
Dedicated call center information will be posted on the above linked websites and soon as they are up and running. It also did not say when the breach had begun or how many payment card numbers were taken.
The hackers were also behind notorious data breaches that affected companies including Whole Foods, Chipotle, Omni Hotels & Resorts and Trump Hotels, Gemini Advisory said.
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