https://www.reuters.com/article/us-usa-products-colonial-pipeline-fbi/fbi-confirms-darkside-ransomware-used-in-colonial-pipeline-hack-idUSKBN2CR1RU

The FBI confirmed on Monday that the ransomware group responsible for the compromise of the Colonial Pipeline network is DarkSide, pinning the blame on an experienced group of cyber criminals who have already hacked into scores of companies in the U.S. and Europe.