Home / malware

PDF

Worm:Win32/Vobfus.WD

First posted on 17 December 2013.
Source: Microsoft

Aliases :

There are no other names known for Worm:Win32/Vobfus.WD.

Explanation :

Threat behavior Worm:Win32/Vobfus.WD 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.

Installation

Worm:Win32/Vobfus.WD copies itself to the following locations:

• c:\documents and settings\administrator\knpon.exe
• c:\documents and settings\administrator\passwords.exe
• c:\documents and settings\administrator\porn.exe
• c:\documents and settings\administrator\secret.exe
• c:\documents and settings\administrator\sexy.exe
• c:\documents and settings\administrator\c\passwords.exe
• c:\documents and settings\administrator\c\porn.exe
• c:\documents and settings\administrator\c\secret.exe
• c:\documents and settings\administrator\c\sexy.exe

The malware creates the following files on your computer:

• c:\documents and settings\administrator\rcx10.tmp
• c:\documents and settings\administrator\rcx11.tmp
• c:\documents and settings\administrator\rcx12.tmp
• c:\documents and settings\administrator\rcx13.tmp
• c:\documents and settings\administrator\rcx14.tmp
• c:\documents and settings\administrator\rcx15.tmp
• c:\documents and settings\administrator\rcx16.tmp
• c:\documents and settings\administrator\rcx17.tmp
• c:\documents and settings\administrator\rcx18.tmp
• c:\documents and settings\administrator\rcx19.tmp
• c:\documents and settings\administrator\rcx1a.tmp
• c:\documents and settings\administrator\rcx1b.tmp
• c:\documents and settings\administrator\rcx1c.tmp
• c:\documents and settings\administrator\rcx1d.tmp
• c:\documents and settings\administrator\rcx1e.tmp
• c:\documents and settings\administrator\rcx1f.tmp
• c:\documents and settings\administrator\rcx20.tmp
• c:\documents and settings\administrator\rcx21.tmp
• c:\documents and settings\administrator\rcx22.tmp
• c:\documents and settings\administrator\rcx23.tmp

Spreads via€¦

Removable and network drives
Worm:Win32/Vobfus.WD may create the following files on targeted drives when spreading:

• :\knpon.exe
• :\passwords.exe
• :\porn.exe
• :\secret.exe
• :\sexy.exe
• :\subst.exe

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.
This malware description was produced and published using our automated analysis system's examination of file SHA1 fe6ad00b1ad124b8182a6fd8ddd96fe579de1474.Symptoms

System changes

The following could indicate that you have this threat on your PC:

• The presence of the following files:
  
  

c:\documents and settings\administrator\knpon.exe
c:\documents and settings\administrator\passwords.exe
c:\documents and settings\administrator\porn.exe
c:\documents and settings\administrator\rcx10.tmp
c:\documents and settings\administrator\rcx11.tmp
c:\documents and settings\administrator\rcx12.tmp
c:\documents and settings\administrator\rcx13.tmp
c:\documents and settings\administrator\rcx14.tmp
c:\documents and settings\administrator\rcx15.tmp
c:\documents and settings\administrator\rcx16.tmp
c:\documents and settings\administrator\rcx17.tmp
c:\documents and settings\administrator\rcx18.tmp
c:\documents and settings\administrator\rcx19.tmp
c:\documents and settings\administrator\rcx1a.tmp
c:\documents and settings\administrator\rcx1b.tmp
c:\documents and settings\administrator\rcx1c.tmp
c:\documents and settings\administrator\rcx1d.tmp
c:\documents and settings\administrator\rcx1e.tmp
c:\documents and settings\administrator\rcx1f.tmp
c:\documents and settings\administrator\rcx20.tmp

Last update 17 December 2013

 

TOP