Worm:Win32/Vobfus.WO 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.WO 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\zaaut.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:
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c:\documents and settings\administrator\rcx10.tmp
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c:\documents and settings\administrator\rcx11.tmp
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c:\documents and settings\administrator\rcx12.tmp
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c:\documents and settings\administrator\rcx13.tmp
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c:\documents and settings\administrator\rcx14.tmp
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c:\documents and settings\administrator\rcx15.tmp
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c:\documents and settings\administrator\rcx16.tmp
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c:\documents and settings\administrator\rcx17.tmp
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c:\documents and settings\administrator\rcx18.tmp
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c:\documents and settings\administrator\rcx19.tmp
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c:\documents and settings\administrator\rcx1a.tmp
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c:\documents and settings\administrator\rcx1b.tmp
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c:\documents and settings\administrator\rcx1c.tmp
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c:\documents and settings\administrator\rcx1d.tmp
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c:\documents and settings\administrator\rcx1e.tmp
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c:\documents and settings\administrator\rcx1f.tmp
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c:\documents and settings\administrator\rcx20.tmp
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c:\documents and settings\administrator\rcx21.tmp
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c:\documents and settings\administrator\rcx22.tmp
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c:\documents and settings\administrator\rcx23.tmp
Spreads via…
Removable and network drives
Worm:Win32/Vobfus.WO can create the following files on targeted drives:
- <targeted drive>:\passwords.exe
- <targeted drive>:\porn.exe
- <targeted drive>:\secret.exe
- <targeted drive>:\sexy.exe
- <targeted drive>:\subst.exe
- <targeted drive>:\zaaut.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.WO might contact a remote host at ns1.dateback1.com using port 7004. 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 640a3364795efb5687c50cdddb680269f669d570.
