Troj/Ranck-DE is a backdoor Trojan which allows a remote intruder to gain access and control over the computer.
When first run Troj/Ranck-DE copies itself to <System>\msjp32.exe.
The following registry entry is created to run msjp32.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
msjp
<System>\MSJP32.exe