form4.frm definition, relationships, removal:

This is a part of a malicious parasite that violates user privacy and damages the compromised system. The form4.frm file can be used for different purposes depending on the related parasite's type, functionality and carried payload. Although form4.frm may not take any malicious actions by itself, it ensures that a parasite is working properly and therefore needs to be removed. DO NOT open, execute or edit form4.frm!
The form4.frm file is installed and used by Excessive Force. It is also related to other parasites such as Mantis (Shaban), Monk and Nirvana. These threats can use form4.frm for different purposes, as the file's functionality depends on a particular parasite it belongs to.
In some cases a presence of form4.frm does not mean that your system is infected. The file may actually belong to some fully legitimate applications and therefore must stay intact. If you are in doubt, please scan the form4.frm file using you regular spyware remover or antivirus program.