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Microsoft Says Suspected SolarWinds Hackers Breached Its Customer Support Tools Also

(Image Credit: Reuters)

(Image Credit: Reuters)

The company said it had found the compromise during its response to hacks by a team it identifies as responsible for earlier major breaches at SolarWinds.

Microsoft said on Friday an attacker had won access to one of its customer-service agents and then used information from that to launch hacking attempts against customers. The company said it had found the compromise during its response to hacks by a team it identifies as responsible for earlier major breaches at SolarWinds and Microsoft. Microsoft said it had warned the affected customers. A copy of one warning seen by Reuters said that the attacker belonged to the group Microsoft calls Nobelium and that it had access during the second half of May. According to Microsoft, the hackers used the info gleaned from the tools to start “highly targeted" attacks on specific Microsoft customers.

“A sophisticated Nation-State associated actor that Microsoft identifies as NOBELLIUM accessed Microsoft customer support tools to review information regarding your Microsoft Services subscriptions," the warning reads in part. After Reuters asked about that warning, Microsoft announced the breach publicly.

After commenting on a broader phishing campaign that it said had compromised a small number of entities, Microsoft said it had also found the breach of its own agent, who it said had limited powers. The agent could see billing contact information and what services the customers pay for, among other things. “The actor used this information in some cases to launch highly-targeted attacks as part of their broader campaign," Microsoft said.

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