Boss calls this sysadmin/network admin pilot fish into his office with bad news: A machine under someone’s desk has been hacked.

“Now, this is a machine on the LAN, presumably behind our firewalls and security, so this is a matter of concern,” says fish. “Complicating matters, the machine is a Windows host for multiple Linux virtual machines from a vendor who delivers updates as complete VM images, with the operating system and application software preinstalled.

“The target machine is hosting three VMs with different software versions from this vendor. It triggered network monitor alarms due to generating excessive network traffic.

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