Win32.HLLW.Autoruner1.35307

Added to the Dr.Web virus database: 2013-04-18

Virus description added: 2013-04-27

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ctfmon.exe] 'Debugger' = 'avgvctr.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'ctfmon.exe' = 'ctfmon.exe'

Creates the following files on removable media:

<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\RECYCLER\S-1-6-20-9723590193-0193865940-937593904-1600\avhost.exe
<Drive name for removable media>:\RECYCLER\S-1-6-20-9723590193-0193865940-937593904-1600\Desktop.ini

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

blocks the following features:

Creates and executes the following:

Executes the following:

Injects code into

the following system processes:

Terminates or attempts to terminate

the following user processes:

Hides the following processes:

Modifies file system :

Creates the following files:

Sets the 'hidden' attribute to the following files:

<Drive name for removable media>:\RECYCLER\S-1-6-20-9723590193-0193865940-937593904-1600\avhost.exe
<SYSTEM32>\avgvctr.exe

Modifies the HOSTS file.

Deletes itself.

Network activity:

Connects to:

UDP:

Miscellaneous:

Searches for the following windows: