Troj/Spamsrv-E is a backdoor Trojan for the Windows platform.
Troj/Spamsrv-E allows a remote intruder to send bulk email from an infected computer.
When run Troj/Spamsrv-E will attempt to copy itself to <System>\adirss.exe and create the following registry entry to ensure it is started at login:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
aDir
<System>\adirss.exe
Troj/Spamsrv-E will also attempt to add itself to the Windows XP SP2 firewall's allowed programs list.