Colonial Pipeline hackers stole data on Thursday
Holding tanks are seen at Colonial Pipeline's Charlotte Tank Farm in Charlotte, North Carolina, U.S. an undated photograph. Colonial Pipeline/Handout via REUTERS
The hackers who caused Colonial Pipeline to shut down on Friday began their cyberattack against the top US fuel pipeline operator a day earlier and stole a large amount of data, Bloomberg News reported citing people familiar with the matter.
The attackers are part of a cybercrime group called DarkSide and took nearly 100 gigabytes of data out of Colonial's network in just two hours on Thursday, Bloomberg reported late Saturday, citing two people involved in the company's investigation.
Colonial did not immediately reply to an email from Reuters seeking comment outside usual US business hours.
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Colonial Pipeline shut its entire network, the source of nearly half of the US East Coast's fuel supply, after a cyber attack that involved ransomware.
