Win32.HLLW.Autoruner1.34213
Added to the Dr.Web virus database:
2013-03-20
Virus description added:
2013-03-20
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'ctfmon.exe' = '%WINDIR%\system\ctfmon.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\YiHui.exe
Malicious functions:
Executes the following:
- <SYSTEM32>\attrib.exe +r +s +h <Drive name for removable media>:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h e:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h c:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h j:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h k:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h f:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h j:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h k:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h i:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h g:\yihui.exe
- <SYSTEM32>\attrib.exe +r +s +h h:\yihui.exe
- <SYSTEM32>\ftp.exe -s:ftp.dat
- <SYSTEM32>\attrib.exe +r +s +h c:\AUTORUN.INf
- <SYSTEM32>\cmd.exe /c <Current directory>\YiHui.bat
- <SYSTEM32>\ntsd.exe -c q -pn rfwmain.exe
- <SYSTEM32>\ntsd.exe -c q -pn rfwsrv.exe
- <SYSTEM32>\attrib.exe +r +s +h <Drive name for removable media>:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h h:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h i:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h g:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h e:\AUTORUN.INf
- <SYSTEM32>\attrib.exe +r +s +h f:\AUTORUN.INf
Modifies file system :
Creates the following files:
- <Current directory>\ftp.dat
- C:\YiHui.exe
- C:\autorun.inf
- <Current directory>\YiHui.bat
- %WINDIR%\system\ctfmon.exe
- <Current directory>\YiHui.inf
Sets the 'hidden' attribute to the following files:
- C:\YiHui.exe
- <Drive name for removable media>:\YiHui.exe
- C:\autorun.inf
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- <Current directory>\YiHui.inf
- <Current directory>\ftp.dat
- %TEMP%\~DFC82E.tmp
Deletes itself.
Network activity:
Connects to:
- '21#.#47.250.45':21
- 'localhost':1035
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