Need help? Ask the community or hire an expert.
Go to Avira Answers
Virus:WORM/Vobfus.A.154
Date discovered:14/06/2011
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
VDF version:7.11.09.168 - Tuesday, June 14, 2011
IVDF version:7.11.09.168 - Tuesday, June 14, 2011

 General Method of propagation:
   • Autorun feature


Aliases:
   •  TrendMicro: WORM_VBNA.YRS
   •  Sophos: Mal/Behav-394
   •  Microsoft: Worm:Win32/Arhost


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows 7


Side effects:
   • Drops files
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following location:
   • %APPDATA%\%random character string%.exe



The following file is created:

– %APPDATA%\%random character string% Contains parameters used by the malware.

 Registry To each registry key one of the values is added in order to run the processes after reboot:

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "MSWUpdate"="\"%APPDATA%\%random character string%.exe\""

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "MSWUpdate"="\"%APPDATA%\%random character string%.exe\""



The following registry key is added:

– [HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   • "C:\Documents and Settings\Use\Application Data\%random character string%.exe"="C:\Documents and Settings\Use\Application Data\%random character string%.exe:*:Enabled:CityScape"



The following registry key is changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   New value:
   • "Shell"="Explorer.exe \"%APPDATA%\%random character string%.exe\""

 Backdoor Contact server:
The following:
   • **********.no-ip.info:3177


 Miscellaneous  Checks for an internet connection by contacting the following web site:
   • http://www.maxmind.com/app/locate_my_ip

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Açıklamayı yerleştiren Andrei Ilie tarihinde 26 Ekim 2011 Çarşamba
Açıklamayı güncelleyen: Andrei Ilie tarihinde 31 Ekim 2011 Pazartesi

Geri . . . .
https:// Bu pencere güvenlik amacıyla şifrelenmiştir.