Can run hidden on a remote computer, monitoring everything typed, and e-mailing this info. from the doc: 'Stukach is a tiny little programm, which can run hiddenly on some computer, keeping track of everything user types on the keyboard, and sending this information to you via e-mail. Of course, user never would know you are reading his e-mail and stuff, unless you would say him.'
destructive program [F-Prot]Generic [McAfee]Trj/W32.StuKach [Panda]Trojan.PSW.RitTrojan.PSW.Rit [Kaspersky]
stukst.exe