Troj/QQPass-AH is a password stealing Trojan for the Windows platform.
Troj/QQPass-AH includes functionality to email the information it finds to a remote user.
When first run Troj/QQPass-AH copies itself to <System>\RunDll.exe.
The following registry entry is created to run RunDll.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
RunDll
<System>\RunDll.exe