Troj/Pushdo-Gen is a family of Trojans for the Windows platform.

When members of Troj/Pushdo-Gen are installed they drop and run a further file in memory, usually detected as Troj/Pushu-Gen or Mal/Basine-C. This may then drop further files, including some of the following:

Windows\system32\drivers\ip6fw.sys
Windows\system32\drivers\netdtect.sys
System\drivers\runtime.sys
System\drivers\secdrv.sys


These files are used to provide stealthing for the Trojan.

The dropped file in memory will also often attempt to inject further code into Internet Explorer.

More information can be found at this Sophos page.