Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Stask' = 'wscript.exe "%TEMP%\hydra.vbs"'
Creates the following files on removable media:
- <Drive name for removable media>:\hydra.vbs
- <Drive name for removable media>:\autorun.inf
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
- Registry Editor (RegEdit)
Executes the following:
- '<SYSTEM32>\attrib.exe' +r hydra.vbs
- '<SYSTEM32>\attrib.exe' +r autorun.inf
- '<SYSTEM32>\wscript.exe' "%TEMP%\Hydr4.vbs"
Sets a new unauthorized home page for Windows Internet Explorer.
Modifies file system :
Creates the following files:
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\indonesiancoder[1]
- %TEMP%\hydra.vbs
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\MSWINSCK[1].OCX
- <SYSTEM32>\hydra.vbs
- C:\hydra.vbs
- %WINDIR%\hydra.vbs
- <SYSTEM32>\MSWINSCK.OCX
- %WINDIR%\autorun.inf
- %TEMP%\autorun.inf
- %TEMP%\Hydr4.vbs
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\MSWINSCK[1].OCX
- <SYSTEM32>\autorun.inf
- C:\autorun.inf
Deletes the following files:
- <SYSTEM32>\MSWINSCK.OCX
Network activity:
Connects to:
- 'yo###arty.com':80
- 'in####siancoder.com':80
- 'localhost':1036
- 'ar###ntz.com':80
TCP:
HTTP GET requests:
- in####siancoder.com/
- yo###arty.com/upload/MSWINSCK.OCX
- ar###ntz.com/~checking/wp-includes/MSWINSCK.OCX
UDP:
- DNS ASK in####siancoder.com
- DNS ASK yo###arty.com
- DNS ASK ar###ntz.com