Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'System3' = 'D\vir\winlogon.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\vir\winlogon.exe
- <Drive name for removable media>:\vir\desktop.ini
- <Drive name for removable media>:\autorun.inf
Malicious functions:
Creates and executes the following:
- '%TEMP%\RarSFX0\vir.exe'
Executes the following:
- '<SYSTEM32>\rundll32.exe' <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen %TEMP%\RarSFX0\img.jpg
- '<SYSTEM32>\wscript.exe' "%TEMP%\RarSFX0\system.vbs"
Modifies file system :
Creates the following files:
- C:\autorun.inf
- C:\vir\desktop.ini
- C:\vir\winlogon.exe
- %TEMP%\RarSFX0\img.jpg
- %TEMP%\RarSFX0\vir.exe
- %TEMP%\RarSFX0\system.vbs
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\vir\desktop.ini
- <Drive name for removable media>:\vir\winlogon.exe
- C:\autorun.inf
- C:\vir\desktop.ini
- C:\vir\winlogon.exe
Deletes the following files:
- %TEMP%\RarSFX0\vir.exe
- %TEMP%\RarSFX0\system.vbs
- %TEMP%\RarSFX0\img.jpg
Miscellaneous:
Searches for the following windows:
- ClassName: 'ShImgVw:CPreviewWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
- ClassName: 'EDIT' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'