alternatively if you want SYSTEM privileged cmd.exe on Windows XP (not on Vista, sorry) and you don't have SysInternal's psexec, you can try this:
C:\> time /t
9:42
C:\> at 9:43 /interactive cmd
then at 9:43 a cmd.exe shell pops up.
And HTTPAnalyzer could sniff HTTPS traffic easily. It's DLL injection and it can un-gzip data.