Troj/Clunky-B is a backdoor Trojan for the Windows platform.
Troj/Clunky-B opens up a backdoor port on the infected computer allowing unauthorized remote access. The Trojan can be used to download and run arbitrary files.
When first run Troj/Clunky-B copies itself to:
<System>\Microsoft\fixcomdos.exe
<System>\Microsoft\iexplore.exe
and creates the file <System>\wincontxt.dll. This is a clean data file, and may
safely be deleted.
The following registry entry is created to run fixcomdos.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
SyncMon
<System>\microsoft\fixcomdos.exe