Ukrainian hackers from the Blackjack group attacked Moscow-based internet service provider M9com, destroying servers and deleting approximately 20 terabytes of data including websites and mail servers, leaving part of Moscow without internet and television access. The hackers also exfiltrated over 10 gigabytes of data from mail servers and client databases and made it publicly available via TOR.

Hackers from the Blackjack group hacked M9com and destroyed its servers

Hackers deleted approximately 20 terabytes of data including the company's official website, branch websites, mail server, and cyber protection services

Part of Moscow residents were left without internet and television access

Hackers downloaded more than 10 gigabytes of data from the company's mail server and client databases

Hackers made stolen data available for public research via TOR

Hackers described the attack as a warm-up before a larger attack to revenge the Kyivstar incident

The Ukrainian Blackjack hacker group, possibly linked to the Security Service of Ukraine (SBU), carried out a cyber attack against the Moscow Internet provider M9 Telecom

The attack wiped out about 20 terabytes of data and took out M9com's official website, mail server and cyber protection services

Hackers downloaded more than 10 gigabytes of data from the company's mail server and client databases and made them publicly available through the Tor browser