Win32.HLLW.Autoruner1.37800

Added to the Dr.Web virus database: 2013-05-22

Virus description added: 2013-05-23

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Msn Messsenger' = '<SYSTEM32>\regsvr.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe regsvr.exe'

Creates or modifies the following files:

Creates the following files on removable media:

Malicious functions:

To complicate detection of its presence in the operating system,

blocks execution of the following system utilities:

Executes the following:

'<SYSTEM32>\at.exe' 09:00 /interactive /EVERY:m,t,w,th,f,s,su <SYSTEM32>\svchost .exe
'<SYSTEM32>\at.exe' /delete /yes

Modifies settings of Windows Explorer:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NofolderOptions' = '00000000'

Modifies file system :

Creates the following files:

<SYSTEM32>\setup.ini
<SYSTEM32>\svchost .exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\setting[1].doc
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\setting[1].doc
<SYSTEM32>\setting.ini
%TEMP%\aut2.tmp
%TEMP%\aut1.tmp
<SYSTEM32>\28463\svchost.001
%WINDIR%\regsvr.exe
<SYSTEM32>\regsvr.exe

Sets the 'hidden' attribute to the following files:

Deletes the following files:

%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\setting[1].doc
%TEMP%\aut2.tmp
%TEMP%\aut1.tmp

Network activity:

Connects to:

TCP:

HTTP GET requests:

UDP:

Miscellaneous:

Searches for the following windows: