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Boston - Target and Neiman Marcus are not the only US retailers whose networks were breached over the holiday shopping season last year, according to sources familiar with attacks on other merchants.
Smaller breaches on at least three other well-known US retailers took place and were conducted using similar techniques as the one on Target, according to the people familiar with the attacks.The sources said that they involved retailers with outlets in malls, but declined to elaborate.
Breaches
They also said that while they thought the perpetrators could be the same as those who launched the Target attack, they could not be sure because they were still trying to find the culprits behind all of the security breaches.
Law enforcement sources have said they suspect the ring leaders are from Eastern Europe, which is where most big cyber crime cases have been hatched over the past decade.
Only one well-known retailer, Neiman Marcus, has said that they too have been victim of a cyber attack since Target's 19 December disclosure that some 40 million payment card numbers had been stolen in a cyber attack.
Addresses
Target said on Friday that the data breach was worse than initially thought.
An investigation found that hackers stole the personal information of at least 70 million customers, including names, mailing addresses, telephone numbers and email addresses.
Neiman Marcus said it was not sure if the breach was related to the Target incident.
