Win32.HLLW.Autoruner1.52645

Added to the Dr.Web virus database: 2013-08-01

Virus description added: 2013-08-02

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'crsss' = '<SYSTEM32>\crsss.exe'

Creates the following files on removable media:

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

Creates and executes the following:

Executes the following:

'<SYSTEM32>\cmd.exe' /c ""<Current directory>\<Virus name>.bat""
'<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /t REG_EXPAND_SZ /d MZђ
'<SYSTEM32>\reg.exe' add "HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel" /v "HomePage" /t REG_DWORD /d 00000001 /f
'<SYSTEM32>\cmd.exe' /c <Current directory>\<Virus name>.bat
'<SYSTEM32>\reg.exe' ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /V crsss /T REG_SZ /D <SYSTEM32>\crsss.exe /F
'<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\WindowsUpdate /v DisableWindowsUpdateAccess /t REG_dword /d 00000001 /f
'<SYSTEM32>\reg.exe' ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL /v CheckedValue /t REG_dword /d 00000000 /f

Modifies file system :

Creates the following files:

%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\3[1].txt
<SYSTEM32>\c.txt
<SYSTEM32>\test1.txt
<SYSTEM32>\d.txt
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\2[1].txt
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\1[1].txt
<Current directory>\<Virus name>.bat
<SYSTEM32>\crsss.exe
<SYSTEM32>\Autorun.inf
C:\autorun.inf
C:\GHO.exe

Sets the 'hidden' attribute to the following files:

Deletes itself.

Network activity:

Connects to:

TCP:

HTTP GET requests:

UDP: