Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = 'userinit.exe,wmiexec.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Microsoft Distributed COM Services' = '%WINDIR%\rpcss.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\Microsoft_Office_2009_setup.exe
- <Drive name for removable media>:\yminstall.exe
- <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)
blocks the following features:
- System Restore (SR)
Creates and executes the following:
- %WINDIR%\wmiexec.exe
- %WINDIR%\rpcss.exe
Modifies settings of Windows Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFolderOptions' = '00000001'
Forces autoplay for removable media.
Modifies file system :
Creates the following files:
- %TEMP%\hubacxkwryfkq
- %TEMP%\aut4.tmp
- C:\yminstall.exe
- %TEMP%\aut5.tmp
- %WINDIR%\psconfig.ini
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\config[1].ini
- %TEMP%\zztvkqhixlvewy
- C:\Autorun.inf
- %WINDIR%\rpcss.exe
- %TEMP%\xwtdtyunxouxrn
- %TEMP%\aut1.tmp
- %WINDIR%\wmiexec.exe
- %TEMP%\aut3.tmp
- %TEMP%\ssglavdaytnwbg
- %TEMP%\aut2.tmp
Sets the 'hidden' attribute to the following files:
- C:\yminstall.exe
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\yminstall.exe
- %WINDIR%\rpcss.exe
- %WINDIR%\wmiexec.exe
- C:\Autorun.inf
Deletes the following files:
- %TEMP%\zztvkqhixlvewy
- %TEMP%\aut5.tmp
- %TEMP%\hubacxkwryfkq
- <Drive name for removable media>:\Microsoft_Office_2009_setup.exe
- <Drive name for removable media>:\Autorun.inf
- C:\Autorun.inf
- %TEMP%\aut2.tmp
- %TEMP%\xwtdtyunxouxrn
- %TEMP%\aut1.tmp
- %TEMP%\aut4.tmp
- %TEMP%\aut3.tmp
- %TEMP%\ssglavdaytnwbg
Network activity:
Connects to:
- 'ja###r.6te.net':80
TCP:
HTTP GET requests:
- ja###r.6te.net/config.ini
UDP:
- DNS ASK ja###r.6te.net
- '<Private IP address>':1036
Miscellaneous:
Searches for the following windows:
- ClassName: 'BUTTON' WindowName: ''
- ClassName: 'Shell_TrayWnd' WindowName: ''