This threat may make lasting changes to an affected system's configuration that will NOT be restored by detecting and removing this threat. For more information on returning an affected system to its pre-infected state, please see the following information:
Disable Autorun functionality
Worm:Win32/Vobfus.OV attempts to spread via removable drives on computers that support Autorun functionality. This is a particularly common method of spreading for many current malware families. For information on disabling Autorun functionality, please see the following article: http://support.microsoft.com/kb/967715/
Worm:Win32/Vobfus.OV is a member of Win32/Vobfus - a family of worms that spreads via network drives and removable drives. It may also download and execute arbitrary files.
Worm:Win32/Vobfus.OV creates the following files on an affected computer:
c:\documents and settings\administrator\toeze.exe
Worm:Win32/Vobfus.OV may create the following files on targeted drives when spreading:
It also places an autorun.inf file in the root directory of the targeted drive. Such autorun.inf files contain execution instructions for the operating system, so that when the removable drive is accessed from another computer supporting the Autorun feature, the malware is launched automatically.
Note: This worm was observed to write an executable and create an autorun.inf file on a targeted drive in our automated testing environment. This is particularly common malware behavior, generally utilized in order to spread malware from computer to computer.
It should also be noted that autorun.inf files on their own are not necessarily a sign of infection, as they are used by legitimate programs and installation CDs.
Contacts remote host
Worm:Win32/Vobfus.OV may contact a remote host at ns1.chopzones.com using port 8000. Commonly, malware may contact a remote host for the following purposes:
To report a new infection to its author
To receive configuration or other data
To download and execute arbitrary files (including updates or additional malware)
To receive instruction from a remote attacker
To upload data taken from the affected computer
This malware description was produced and published using our automated analysis system's examination of file SHA1 7e80f30ffbcaa414595060697ab7667072a91d51.