Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'YiHui' = 'c:\YiHui.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\YiHui.exe
Malicious functions:
Creates and executes the following:
- C:\667.exe
- C:\kq.exe
- C:\KINSTALLERS_66_4070.exe
- C:\haoie3112.exe
- C:\667.exe (downloaded from the Internet)
- C:\kq.exe (downloaded from the Internet)
- C:\haoie3112.exe (downloaded from the Internet)
- C:\KINSTALLERS_66_4070.exe (downloaded from the Internet)
Executes the following:
- <SYSTEM32>\attrib.exe +r +s +h f:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h e:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h <Drive name for removable media>:\yihui.exe
- <SYSTEM32>\reg.exe ADD HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run /v YiHui /t REG_SZ /d c:\YiHui.exe /f
- <SYSTEM32>\attrib.exe +r +s +h h:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h g:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h c:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h e:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h <Drive name for removable media>:\AUTORUN.INf
- <SYSTEM32>\cmd.exe /c <Current directory>\YiHui.bat
- <SYSTEM32>\attrib.exe +r +s +h h:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h g:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h f:\AUTORUN.INf
Modifies file system :
Creates the following files:
- C:\667.exe
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\667[1].exe
- <Current directory>\YiHui.inf
- C:\YiHui.exe
- <Current directory>\YiHui.bat
- C:\kq.exe
- C:\haoie3112.exe
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\haoie3112[1].exe
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\KINSTALLERS_66_4070[1].exe
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\kq[1].exe
- C:\KINSTALLERS_66_4070.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\YiHui.exe
- C:\YiHui.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- <Current directory>\YiHui.inf
Deletes itself.
Network activity:
Connects to:
- 'www.cf###ogui.com':80
- 'localhost':1035
TCP:
HTTP GET requests:
- www.cf###ogui.com/kk/kq.exe
- www.cf###ogui.com/kk/667.exe
- www.cf###ogui.com/kk/haoie3112.exe
- www.cf###ogui.com/kk/KINSTALLERS_66_4070.exe
UDP:
- DNS ASK www.cf###ogui.com
