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Hackers hit Moscow internet provider in response to Kyivstar cyber attack

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Hackers linked to Ukraine’s main spy agency have breached computer systems at a Moscow-based internet provider in retaliation for a Russian cyber attack against Ukrainian telecom giant Kyivstar, a source with direct knowledge of the operation told Reuters on Tuesday.

M9 Telecom did not respond to an emailed request for comment

Hackers linked to Ukraine’s main spy agency have breached computer systems at a Moscow-based internet provider in retaliation for a Russian cyber attack against Ukrainian telecom giant Kyivstar, a source with direct knowledge of the operation told Reuters on Tuesday.

The hacking group, dubbed "Blackjack", has previously been linked to the Security Service of Ukraine (SBU). The hackers deleted 20 terrabytes of data at M9 Telecom, a small Russian internet and TV provider, leaving some Moscow residents without internet, the source said.

The digital intrusion was a warm-up for a larger cyber attack which would be "serious revenge for Kyivstar", the source said, citing the hackers. The source did not say when the hack took place.

M9 Telecom did not respond to an emailed request for comment. The company's website was still online on Tuesday, despite claims by the hacking group that it had been destroyed.

Reuters was unable to independently verify the extent to which the hack was successful. Reached by phone, M9 Telecom's CEO Andrey Pavolvsky declined to comment.

By James Pearson and Tom Balmforth

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