Microsoft: Russian-backed hackers targeting cloud services

RICHMOND, VA. >> Microsoft said Monday the same Russia-backed hackers responsible for the 2020 SolarWinds breach continue to attack the global technology supply chain and have been relentlessly targeting cloud service companies and others since summer.

The group, which Microsoft calls Nobelium, has employed a new strategy to piggyback on the direct access that cloud service resellers have to their customers’ IT systems, hoping to “more easily impersonate an organization’s trusted technology partner to gain access to their downstream customers.” Resellers act as intermediaries between giant cloud companies and their ultimate customers, managing and customizing accounts.

“Fortunately, we have discovered this campaign during its early stages, and we are sharing these developments to help cloud service resellers, technology providers, and their customers take timely steps to help ensure Nobelium is not more successful,” Tom Burt, a Microsoft vice president, said in a blog post.

The Biden administration downplayed Microsoft’s announcement. A U.S. government official briefed on the issue who insisted on anonymity to discuss the government’s response noted that “the activities described were unsophisticated password spray and phishing, run-of-the mill operations for the purpose of surveillance that we already know are attempted every day by Russia and other foreign governments.”

The Russian Embassy did not immediately reply to a request for comment.

Microsoft has been observing Nobelium’s latest campaign since May and has notified more than 140 companies targeted by the group, with as many as 14 believed to have been compromised. The attacks have been increasingly relentless since July, with Microsoft noting that it had informed 609 customers that they had been attacked 22,868 times by Nobelium, with a success rate in the low single digits. That’s more attacks than Microsoft had flagged from all nationstate actors in the previous three years.