The Ten Worst Corporate Cyberattacks of All-Time

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In April 2020,  its entire network was infected with Maze ransomware. All servers were encrypted and the company’s work-at-home capabilities were compromised. 

On May 7, Cognizant said it had “fully recovered from the ransomware infection and restored most of its services”. Loss revenue and long-term cost of the is said to be $70-$100 million including legal, consulting, and remediation costs.

  • ISS World

In February 2020, a ransomware attack shut down ISS World, a Denmark-based facilities management company. It is the largest facility services management company in the world. 

During the attack, workers lost access to systems and email. By the end of March, ISS was able to relaunch most business-critical systems but some are yet to be restored or rebuilt. The cost of the remediation is expected to be up to $75 million.

  • Dubsmash, Armour Games, Share This, etc…

In February 2019,  it had been reported that 16 company websites have been hacked from 2017 to 2019, through their websites, by the same hacker group.