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Encryption of Read-Only File Possible??


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#1 skuddle

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Posted 17 April 2015 - 04:25 PM

In Windows Vista (SP2), if I set a file's attributes to "Read-Only" can that file then be encrypted by somebody else (so they can ask for a "ransom")?


Edited by Chris Cosgrove, 17 April 2015 - 05:49 PM.
Moved from Vista to 'General Security'


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#2 O.T.T.

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Posted 17 April 2015 - 06:09 PM

I encrypted a "read only" txt-file with AxCrypt and that worked... so your answer is yes it is possible !

 

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#3 😇

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Posted 02 June 2015 - 05:28 PM

Yes, it's not protection against a ransomware, since it can:

  • Remove the read-only flag and rewrite your file
  • Write an encrypted copy to a new file and delete the previous

 

You would need to have it on a read-only media sucha s a CD/DVD.



#4 Didier Stevens

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Posted 03 June 2015 - 03:52 PM

If you want to make a file read-only to protect it from cryptoware, don't use the read-only flag, but ACLs.


Didier Stevens
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Microsoft MVP 2011-2016 Consumer Security, Windows Insider MVP 2016-2018
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