Hackers broke into the internal systems of the largest telecommunications company in Argentina Telecom S.A. and demand to pay $ 7.5 million in Monero cryptocurrency.

According to Cryptonews, citing a local publication, the attack did not affect users and services provided by the company. Telecom S.A lost access to Office365 and OneDrive files, and some internal systems including corporate VPN, Citrix, Siebel, Genesys, the Customer and Field Service virtual machines, and internal users’ PCs.

The Monero amount announced by the attackers must be transferred by Tuesday night, July 21. Otherwise, it will double and the ransom will be $ 15 million.

In addition to demanding payments, the hackers also left a link to a site where you can purchase Monero.

According to some reports, the attack was organized by the hackers behind the Sodinokibi ransomware.

Earlier, the hacker group said it would completely ditch bitcoin in favor of privacy-focused Monero to make it harder for law enforcement to track transactions.