Neiman Marcus confirmed that data from 1.1 million debit and credit cards could have been compromised during an in-store data breach last year, according to VentureBeat.

Based on a statement published on the luxury retailer's website, malware was installed on Neiman Marcus' systems. The malware actively gathered data from payment cards which were used in the store from July 16 to October 30, 2013, the report detailed.

The American department store also confirmed that 2,400 shoppers had reported fraudulent charges on their cards. However, social security numbers were not exposed during the attack. According to the company, there were no suspicious activities among online buyers and Neiman Marcus card holders, the report explained.

This retail data breach follows a similar attack on Target Corp which happened in mid-November. During the Target malware attack, customer names, home and email addresses, and payment card information were scraped. The store said the breach affected 110 million customers, the report stated.

Neiman Marcus did not specify how it will build up its security system, but the firm said it is presently evaluating and beefing up its systems, VentureBeat reported.