Ukraine scrambles to contain new cyber threat after 'NotPetya' attack

A computer screen shows menu of the M.E.Doc accounting software at an office in Kiev, Ukraine July 5, 2017. REUTERS/Valentyn Ogirenko

KIEV (Reuters) - The Ukrainian software firm used to launch last week's global cyber attack warned on Wednesday that all computers sharing a network with its infected accounting software had been compromised by hackers.

The attack used a virus, dubbed "NotPetya" by some experts, to take down thousands of computers in dozens of countries, disrupting shipping and businesses. Investigators now say the hack may be far more nefarious than previously thought.