Troj/Agent-BC is a Trojan proxy which makes itself appear to be a license key generator.
When run using the filename CRSRR.EXE the Trojan immediatelly enters the proxy mode, listenting on TCP/5498 and TCP/25341.
When run using any other filename, Troj/Agent-BC will create MSKEY.EXE in the default temporary folder and execute it, copy itself to the Windows folder as CRSRR.EXE and create the following registry entry so as to auto-run on user logon or computer reboot:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Print Driver Helper Service
%SYSTEM%\crsrr.exe
The Trojan may attempt to download files and publicise the IP address of the infected computer such that the remote attacker may gain access.
The key generator mskey.exe is non-malicious and can be safely deleted.