The Russian-linked hacking group that’s been blamed for an attack on the U.S. government and a significant number of private U.S. companies last year is targeting key players in the global technology supply chain, according to cybersecurity experts at Microsoft.

Nobelium, as the hacking group is known, is infamous for the SolarWinds hack.

On Monday, Tom Burt, Microsoft corporate vice president of customer security and trust, said Nobelium has “been attempting to replicate the approach it has used in past attacks by targeting organizations integral to the global IT supply chain.”