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Win32.HLLW.Autoruner.437

Added to the Dr.Web virus database: 2012-07-05

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kava' = '<SYSTEM32>\kavo.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\ntdelect.com
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
Injects code into
the following system processes:
  • %WINDIR%\Explorer.EXE
Installs hooks to intercept notifications
on keystrokes:
  • Handler for all processes: <SYSTEM32>\kavo0.dll
Searches for windows to
bypass different anti-viruses:
  • ClassName: 'AVP.Product_Notification' WindowName: ''
  • ClassName: 'AVP.AlertDialog' WindowName: ''
Hooks the following functions in System Service Descriptor Table (SSDT):
  • NtOpenProcess, handler: wincab.sys
  • NtEnumerateValueKey, handler: wincab.sys
  • NtEnumerateKey, handler: wincab.sys
Forces autoplay for removable media.
Modifies file system :
Creates the following files:
  • <SYSTEM32>\wincab.sys
  • C:\ntdelect.com
  • C:\autorun.inf
  • <SYSTEM32>\kavo0.dll
  • %TEMP%\wdagnb7.dll
  • %TEMP%\206k9.sys
  • <SYSTEM32>\kavo.exe
Sets the 'hidden' attribute to the following files:
  • C:\autorun.inf
  • <Drive name for removable media>:\ntdelect.com
  • <Drive name for removable media>:\autorun.inf
  • <SYSTEM32>\kavo.exe
  • <SYSTEM32>\kavo0.dll
  • C:\ntdelect.com
Deletes the following files:
  • C:\autorun.inf
  • <Drive name for removable media>:\ntdelect.com
  • <Drive name for removable media>:\autorun.inf
  • %TEMP%\206k9.sys
  • <SYSTEM32>\wincab.sys
  • C:\ntdelect.com
Deletes itself.
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''
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