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Worm:Win32/Vobfus.WZ


First posted on 11 February 2014.
Source: Microsoft

Aliases :

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

Explanation :

Threat behavior

Installation

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

  • 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\xuoofuh.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 PC:
  • 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\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
  • c:\documents and settings\administrator\rcx24.tmp


Spreads via€¦

Removable and network drives

Worm:Win32/Vobfus.WZ can create the following files on targeted drives:

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

It also creates an autorun.inf file in the root folder of the removable drive. The file has instructions to launch the malware automatically when the removable drive is connected to a PC with the Autorun feature turned on.
This is a common way for malware to spread. However, autorun.inf files on their own are not necessarily a sign of infection; they are also used by legitimate programs.

Payload

Contacts remote host

Worm:Win32/Vobfus.WZ might contact a remote host at ns1.backdates1.com using port 7001. Commonly, malware does this to:
  • Report a new infection to its author
  • Receive configuration or other data
  • Download and run files, including updates or other malware
  • Receive instructions from a remote hacker
  • Upload data taken from your PC
This malware description was produced and published using automated analysis of file SHA1 1dd5a7430a56668e825011345c5432858be49c82.Symptoms

System changes

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

  • You have these files:

    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\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

Last update 11 February 2014

 

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