批处理创建只读文件预防比特币勒索病毒Petya

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1. @echo off
   
2. set file1=%systemroot%\perfc
   
3. set file2=%systemroot%\perfc.dll
   
4. set file3=%systemroot%\perfc.dat
   
5. if not exist %file1% (
   
6.     type nul > %file1%
   
7. ) else (
   
8.     attrib +R %file1%
   
9. )
   
10. if not exist %file2% (
    
11.     type nul > %file2%
    
12. ) else (
    
13.     attrib +R %file2%
    
14. )
    
15. if not exist %file3% (
    
16.     type nul > %file3%
    
17. ) else (
    
18.     attrib +R %file3%
    
19. )

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提醒，请及时安装Windows补丁。
https://support.microsoft.com/en-us/help/4025686/microsoft-security-advisory-4025685-guidance-for-supported-platforms
https://support.microsoft.com/en-us/help/4025687/microsoft-security-advisory-4025685-guidance-for-older-platforms