The Federal Motor Carrier Safety Administration (FMCSA) issued a regional emergency declaration affecting 17 states and the District of Columbia. The declaration aims to provide assistance to areas in need of an immediate supply of gasoline, diesel, jet fuel, and other refined petroleum products. Colonial Pipeline s operations are vital for markets and refineries on the East Coast, accounting for 45% of all fuel consumed in the region. Officials told multiple publications that behind the attack is Darkside ransomware, an operation that emerged in mid-August 2020.
Source: https://www.bleepingcomputer.com/news/security/us-declares-state-of-emergency-after-ransomware-hits-largest-pipeline/