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KIEV: Several multinational companies said on Tuesday they were targeted in a massive wave of cyberattacks which started in Russia and Ukraine before spreading to western Europe.
Danish sea transport company Maersk, British advertising giant WPP and the French industrial group Saint-Gobain were among those who said they came under attack and put protection protocols in place to avoid data loss.
The first reports of trouble came from Ukrainian banks, Kiev's main airport and Russia's Rosneft oil giant, in a major incident reminiscent of the recent WannaCry virus.
IT experts identified the virus as "Petrwrap", a modified version of the Petya ransomware which hit last year and demanded money from victims in exchange for the return of their data.
It also recalled a ransomware outbreak last month which hit more than 150 countries and a total of more than 200,000 victims with the WannaCry ransomware.
The virus is "spreading around the world, a large number of countries are affected," Costin Raiu, a researcher at the Moscow-based computer security firm Kaspersky Lab said via Twitter.
When asked if the latest attacks had affected systems in India, CERT-In Director General Sanjay Bahl said he was not aware of it currently.
Ukrainian Prime Minister Volodymyr Groysman wrote on Facebook that the attacks in his country were "unprecedented" but insisted that "important systems were not affected."
- 'Powerful cyberattack' -
Ukraine's central bank said several lenders had been hit in the country, hindering operations and leading the regulator to warn other financial institutions to tighten security measures.
Banks were experiencing "difficulty in servicing customers and performing banking operations" due to the attacks, the bank said in a statement.
Among those hit was Oschadbank, one of Ukraine's largest banks.
Russian state oil giant Rosneft said earlier that its servers suffered a "powerful" cyberattack but thanks to its backup system "the production and extraction of oil were not stopped."
The attacks on Russian and Ukrainian companies involved a type of ransomware that locks users out of the computer and demands purchase of a key to reinstate access, said cybersecurity company Group IB.
Beyond Ukraine and Russia, the wave of cyberattacks also impacted Maersk, a global cargo shipping company and Saint-Gobain, a French company producing construction materials and British-based WPP.
"To protect our data we have isolated our systems," Saint-Gobain told AFP.
A Maersk representative told AFP that company systems are "down across all business units due to a virus."
Asked about the ransomware impact on India, security firm Lucideus security firm Lucideus to PTI said, "Even post WannaCry attack, with our experience we can say that over 50 per cent of Windows systems are still not patched across India. This is a worrisome figure."
The attacks started around 2:00 pm Moscow time (1100GMT), the group said, and quickly spread to 80 companies in Ukraine and Russia.
The cryptolocker demands $300 in bitcoins and does not name the encrypting program, which makes finding a solution difficult, said Group IB spokesman Evgeny Gukov in an emailed comment.
- Energy firms, airport -
Attacks were also reported by the power company in Kiev, Kyivenergo. "We were forced to turn off all of our computers," a company representative told Interfax Ukraine agency.
The attack also affected some Ukraine government computers and the website of Ukraine's biggest airport Boryspil.
"The official airport website and the flight schedule are not working!" wrote airport director Pavlo Ryabykin on Facebook, though without confirming the website was hit by a virus.
The government press service said Petya hit "personal computers" of some individuals but not government servers.
Ukraine's delivery service company Nova Poshta confirmed the virus that hit its computers was Petya.A.
The fight against cyber attacks has sparked exponential growth in global protection spending, with the cyber security market estimated at $120 billion this year, more than 30 times its size just over a decade ago.
But even that massive figure looks set to be dwarfed within a few years, experts said, after ransomware attacks crippled computers worldwide in the past week.