Image: Bleeping Computer

Cybercriminals are targeting websites running the Magento platform to inject them with code that can steal credit card data and infect visitors with malware, Flashpoint reports.

A new payment card stealing campaign with skimmer script targeting Magento stores is embedding Javascript based MagentoCore Malware on Magento stores that record keystrokes from customers and transfer the data in real-time to magentocore command and control servers.

This week, on Monday, Willem de Groot, a well-known Dutch security expert, figured out a previously unreported card scrapping campaign involving a skimmer script loaded from the magentocore.net domain.

At least 1,000 Magento admin panels have been compromised, Flashpoint says. The attackers attempt to log in using common and known default Magento credentials, once again proving that changing the credentials upon installation of the platform can prevent compromise.

The campaign has infected 7,339 Magento stores with a script that collects payment card data from people shopping on the sites.

“The rash of attacks resurrects the epidemic of default credential usage among admins. Default credentials were at the core of the 2016 Mirai attacks where hackers were able to access connected devices such as security cameras, DVRs and routers using known and common default passwords,” Flashpoint notes.

GB Hackers has described about the working mechanism of MagentoCore Malware:

The malware gain access to the control panel of the store by using brute force techniques and once they gain access to the store they embedded a skimmer Javascript and the scripts look for inputs in fields such as credit card number, validity and billing address.

MagentoCore Malware
Image: GB Hackers

Once it gathers the required information it sends the data in real-time to magentocore[.]Net server that located in Moscow.

The malware also adds a backdoor to the cron file which used to configure regularly scheduled tasks. By having a backdoor added in the cron file it regularly downloads the malicious code from the server and runs the code. After running the code it also deletes itself to avoid traces.

It also removes any other competing malware found already installed in the Magento Store. Also, it uses to change the password “how1are2you3″ periodically to the admin accounts.

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