Troj/Alpha-C is a backdoor Trojan for the Windows platform.
Troj/Alpha-C includes functionality to send notification messages to remote locations.
When first run Troj/Alpha-C copies itself to <Windows>\diagnostic.exe.
The following registry entry is created to run diagnostic.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Diagnostic
<Windows>\diagnostic.exe