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a.k.a. Win32/KillDisk.NBI, Win32/KillDisk.NBH, Win32/KillDisk.NBD, Win32/KillDisk.NBC, Win32/KillDisk.NBB
KillDisk is a disk-wiping tool designed to overwrite files with random data to render the OS unbootable. It was first observed as a component of BlackEnergy malware during cyber attacks against Ukraine in 2015. KillDisk has since evolved into stand-alone malware used by a variety of threat actors against additional targets in Europe and Latin America; in 2016 a ransomware component was also incorporated into some KillDisk variants.