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Profil

Win32.HLLW.Autoruner.54511

Added to the Dr.Web virus database: 2011-07-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /l'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /S'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /B'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /m'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /y'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /e'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /z'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /k'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /u'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /G'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /r'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /f'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /T'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /q'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /J'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /H'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /P'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /D'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoiob' = '%HOMEPATH%\yoiob.exe /c'
Creates the following files on removable media:
  • <Drive name for removable media>:\Pictures.lnk
  • <Drive name for removable media>:\Documents.lnk
  • <Drive name for removable media>:\Video.lnk
  • <Drive name for removable media>:\Music.lnk
  • <Drive name for removable media>:\Passwords.lnk
  • <Drive name for removable media>:\yoiob.exe
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\New Folder.lnk
  • <Drive name for removable media>:\yoiobx.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Creates and executes the following:
  • %HOMEPATH%\yoiob.exe 
Modifies file system :
Creates the following files:
  • %HOMEPATH%\yoiob.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\yoiob.exe
  • <Drive name for removable media>:\yoiobx.exe
  • %HOMEPATH%\yoiob.exe
  • <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
  • 'ns#.###eo-shares.com':8000
UDP:
  • DNS ASK ns#.###eo-shares.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''