Troj/Dadobra-A is a downloader Trojan which will download, install and run new software without notification that it is doing so.
Troj/Dadobra-A attempts to download multiple files from a remote website to the following locations and run them:
<System>\x<number>.exe
where number ranges from 1 to 7.
Upon successful download of the file, the corresponding registry entry will be set:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
x<number>
<System>\x<number>.exe
where number ranges from 1 to 7.