I was reading about the iKAT tools; I came across their set of binaries that don’t obey GP. These are awesome and if you couple them with the base64 file encoding proxy I wrote a while ago. With this you should be able to get full cmd access on just about any environment where you have internet access. the tools included in the iKAT package are:
cmd.exe
command.com
control.exe
cscript.exe
explorer.exe
ipconfig.exe
osk.exe
rasphone.exe
regedit.exe
runonce.exe
sc.exe
taskman.exe
taskmgr.exe
wscript.exe
And the complete zip is mirrored here.