Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\nyan
Creates the following files on removable media
- <Drive name for removable media>:\msvhost.exe
- <Drive name for removable media>:\000814251_video_01.lnk
Malicious functions
Executes the following
- '%WINDIR%\syswow64\taskkill.exe' /F /IM wscript.exe
- '%WINDIR%\syswow64\taskkill.exe' /F /IM cmd.exe
Modifies file system
Creates the following files
- %TEMP%\msvhost.exe
Sets the 'hidden' attribute to the following files
- <Drive name for removable media>:\msvhost.exe
Miscellaneous
Searches for the following windows
- ClassName: '' WindowName: ''
Creates and executes the following
- '%TEMP%\msvhost.exe'
- '%WINDIR%\syswow64\taskkill.exe' /F /IM wscript.exe' (with hidden window)
- '%WINDIR%\syswow64\taskkill.exe' /F /IM cmd.exe' (with hidden window)
- '%WINDIR%\syswow64\schtasks.exe' /Delete /tn NYAN /F' (with hidden window)
- '%WINDIR%\syswow64\schtasks.exe' /create /tn NYAN /tr "<Full path to file>" /sc minute /mo 1' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\schtasks.exe' /Delete /tn NYAN /F
- '%WINDIR%\syswow64\schtasks.exe' /create /tn NYAN /tr "<Full path to file>" /sc minute /mo 1
