Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Internet Security' = '%ALLUSERSPROFILE%\Application Data\mldefender.exe'
- [<HKLM>\SYSTEM\ControlSet001\Control\Print\Providers\1e4ab] 'Name' = '%TEMP%\1.tmp'
Malicious functions:
Creates and executes the following:
- '%ALLUSERSPROFILE%\Application Data\mldefender.exe'
Injects code into
the following system processes:
- <SYSTEM32>\spoolsv.exe
Terminates or attempts to terminate
the following system processes:
- <SYSTEM32>\cscript.exe
- <SYSTEM32>\cmd.exe
a large number of user processes.
Modifies file system:
Creates the following files:
- %WINDIR%\Temp\<INETFILES>\Content.IE5\T7QGJ582\desktop.ini
- %WINDIR%\Temp\<INETFILES>\Content.IE5\GHIJKLMN\desktop.ini
- %WINDIR%\Temp\<INETFILES>\Content.IE5\CX2VSHMV\desktop.ini
- %WINDIR%\Temp\History\History.IE5\desktop.ini
- %WINDIR%\Temp\History\History.IE5\index.dat
- %WINDIR%\Temp\Cookies\index.dat
- %WINDIR%\Temp\<INETFILES>\Content.IE5\C0CB9945\desktop.ini
- %ALLUSERSPROFILE%\Desktop\Internet Security Pro.lnk
- %ALLUSERSPROFILE%\Application Data\mldefender
- %TEMP%\1.tmp
- %WINDIR%\Temp\<INETFILES>\Content.IE5\desktop.ini
- %WINDIR%\Temp\<INETFILES>\Content.IE5\index.dat
- %WINDIR%\Temp\~DFB317.tmp
Sets the 'hidden' attribute to the following files:
- %WINDIR%\Temp\<INETFILES>\Content.IE5\GHIJKLMN\desktop.ini
- %WINDIR%\Temp\<INETFILES>\Content.IE5\T7QGJ582\desktop.ini
- %WINDIR%\Temp\History\History.IE5\desktop.ini
- %WINDIR%\Temp\<INETFILES>\Content.IE5\desktop.ini
- %WINDIR%\Temp\<INETFILES>\Content.IE5\C0CB9945\desktop.ini
- %WINDIR%\Temp\<INETFILES>\Content.IE5\CX2VSHMV\desktop.ini
Moves the following files:
- from %ALLUSERSPROFILE%\Application Data\mldefender to %ALLUSERSPROFILE%\Application Data\mldefender.exe
Moves itself:
- from <Full path to file> to %TEMP%\2.tmp
Network activity:
Connects to:
- 'tw###cam.net':80
TCP:
HTTP GET requests:
- http://tw###cam.net/images/s.php?id#####
UDP:
- DNS ASK tw###cam.net
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
