In this particular case it is not really a virus: “ Mitogen interacts with many aspects of the operating system, threading, SSH, sudo, sockets, TTYs, shell, Pyt

In this particular case it is not really a virus: “ Mitogen interacts with many aspects of the operating system, threading, SSH, sudo, sockets, TTYs, shell, Python runtime, and timing and ordering uncertainty introduced through interaction with the network, GIL and OS scheduling.” It is more like a networked python program calling shell ;-). Problem is usually virus is assembler level or C bare metal or minimum dependence on certain aspect of host Env. All virus is small. A subset.