The Federal Bureau of Investigations (FBI) is warning that someone is scraping credit card data from the checkout pages of US businesses’ websites.
“As of January 2022, unidentified cyber actors unlawfully scraped credit card data from a US business by injecting malicious PHP Hypertext Preprocessor (PHP) code into the business’ online checkout page and sending the scraped data to an actor-controlled server that spoofed a legitimate card processing server,” the FBI said in an alert.
It said the “unidentified cyber actors” also established backdoor access to the victim’s system by modifying two files within the checkout page.
The attackers began targeting US businesses in September 2020 by inserting malicious PHP code into the customized online checkout pages. But earlier this year, the actors changed tactics using a different PHP function.
The actors create a basic backdoor using a debugging function that allows the system to download two webshells onto the US firm’s web server,