State-controlled Russian oil and gas producer Rosneft has become another victim of a cyberattack, similar to WannaCry.
More than 80 firms in Russia and Ukraine were estimated to have been initially impacted by the Petya virus, which is spreading from Europe to US, and other parts of the world.
Moscow-based cybersecurity company Group-IB was quoted by Bloomberg as saying that this virus disabled computers and asked users to pay $300 in cryptocurrency in order to have their systems unlocked.
According to estimates from Kaspersky Lab analysts, around 2,000 users have so far become victims of the latest virus attack. Of these companies, the most affected are from Russia and its neighbour Ukraine.
Rosneft said its oil production had not been affected by the attack, reported Reuters.
On its Twitter page, Rosneft stated: "The company's servers underwent a powerful hacking attack.
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"The hacking attack could lead to serious consequences, but the company has moved to a reserve production processing system and neither oil output nor refining have been stopped."
Bloomberg reported that the firm did not go through 'serious consequences' as it has moved to “a backup system for managing production processes.”
Europol executive director Rob Wainwright said that the agency is 'urgently responding' to cyber attack reports and is in talks with member states and industry players to understand the nature of this attack.
The other establishments that were impacted by the virus include advertiser WPP and Chernobyl nuclear facility.
Image: Rosneft's exploratory drilling offshore Vietnam. Photo: Courtesy of Rosneft.