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Mailto Ransomware Takes Its Toll

Mailto Ransomware Takes Its Toll

Submitted by • February 14, 2020

With a proper system in place to monitor privileged user access, there will not be any need to negotiate with cybercriminals.

Recently, logistics firm Toll Group was hit with a “new variant” of ransomware known as Mailto or Kokoklock and had been forced to shut down much of its IT infrastructure to prevent the malware from spreading.

The ransomware, which has been variously dubbed NetWalker or Kazkavkovkiz, is believed to have infected as many as 1,000 servers, including Active Directory.

Mailto appends random extensions to file names, making them unusable. It first appeared in around September 2019. It is very similar to the many variants of targeted ransomware that sophisticated cybercriminals have launched against companies that rely on technology to deliver time-sensitive, critical services or products.

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