Ukrainian hackers leave part of Moscow without internet access - source

A source from Ukraine's law enforcement agencies told this to Ukrinform.

"Hackers from the Blackjack group, who are likely related to the SBU [Security Service of Ukraine], hacked the Moscow-based internet service provider M9com and destroyed its servers," the source said.

According to the source, the hackers deleted about 20 terabytes of data: the company's official website, websites of the company's branches, mail server, cyber protection services, etc. As a result, part of the residents of Moscow remained without internet and television access.

In addition, cyber warriors downloaded more than 10 gigabytes of data from the company's mail server and client databases and made them available for research by anyone (open via TOR).

According to the source, the hackers said this was a "warm-up attack" before the bigger one, which will be a "serious revenge for Kyivstar."

On December 12, Ukraine's telecommunications operator Kyivstar said it was the target of a powerful hacker attack. Customers were left without phone or internet access.