First notified in November of an information break occurrence, famous garments retailer Forever 21 has now affirmed that hackers stole credit card data from its stores all through the nation for a while amid 2017.

Despite the fact that the organization did not yet indicate the aggregate number of its clients influenced by the breach, it confirmed that malware was introduced on some Point of Sale (POS) frameworks in stores over the U.S. at different circumstances between April 3, 2017, and November 18, 2017.

As indicated by the organization’s examination, which is as yet continuous, the malware was intended to scan for and likely take delicate client Mastercard information, including credit card numbers, termination dates, confirmation codes and cardholder names.

However, according to the company, not every POS terminal in affected stores was infected with the malware and not every store was impacted during the full-time period (roughly 8 months) of the breach.

Forever 21 advised customers who shopped at its stores to stay vigilant and keep an eye on their credit transactions for any suspicious activity, and immediately notify their banks that issued the card if found any.

The company has promised to continue working with “security firms to enhance” their security measures.