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Win32.HLLW.Autoruner2.37271

Added to the Dr.Web virus database: 2018-04-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /H'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /Y'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /F'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /I'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /u'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /L'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /N'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /k'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /o'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /R'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /t'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /S'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /p'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /Q'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /w'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /C'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /B'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /j'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /v'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /d'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /e'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /z'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /a'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /X'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /g'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yoauve' = '%HOMEPATH%\yoauve.exe /M'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\yoauve.exe
  • <Drive name for removable media>:\Secret.exe
  • <Drive name for removable media>:\Sexy.exe
  • <Drive name for removable media>:\RCX1.tmp
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Modifies file system:
Creates the following files:
  • %HOMEPATH%\yoauve.exe
Sets the 'hidden' attribute to the following files:
  • %HOMEPATH%\yoauve.exe
  • <Drive name for removable media>:\autorun.inf
Deletes the following files:
  • <Drive name for removable media>:\Sexy.exe
Substitutes the following files:
  • <Drive name for removable media>:\Sexy.exe
Network activity:
Connects to:
  • 'ns#.##ayer1352.com':8000
UDP:
  • DNS ASK ns#.##ayer1352.com
Miscellaneous:
Creates and executes the following:
  • '%HOMEPATH%\yoauve.exe'