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Researcher Creates Tool to Unlock WannaCry-Infected Windows XP Files

A security researcher appears to have discovered a flaw in WannaCry that may provide Windows XP victims of the attack with a way to unlock their files.

Researcher Creates Tool to Unlock WannaCry-Infected Windows XP Files

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Jetico

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Re: partial .bca file created - not sure what to do
« Reply #4 on: January 17, 2017, 10:54:44 AM »
You will have "folder.bca" in both cases.
The difference is that in the first case (Encrypt with BCArchive)  you do not have the original folder "folder" anymore
and in the second case (add to folder.bca) the original folder is intact.

antinomicTopic starter

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Re: partial .bca file created - not sure what to do
« Reply #3 on: January 16, 2017, 12:26:25 PM »
Thank you!

Last question - right now I am left with an archive file called "filename.bca". Does that mean that I used the second method (add to folder.bca)?

Thanks again,

Antinomy

Jetico

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Re: partial .bca file created - not sure what to do
« Reply #2 on: January 16, 2017, 05:14:03 AM »
There are two BCArchive commands that may be used to create an archive for a particular folder. Both are available through right-click menu for the folder:  "Encrypt with BCArchive" and "Add to folder.bca".
If you run the first command, the original folder has been 'converted' to archive. I.e. when it is completed, you have BCA file with all the files inside and you do NOT have the original folder.
If you run the second command, the original folder still exists after creating the archive.

So, if you used the first command and if you now delete the partial .bca file, you will lose the files that were already 'converted'.
If you used the second command, you won't lose anything.
Please check the contents of the original folder.  If it does not contain all the files, extract them from the partial BCA archive and then try again.

antinomicTopic starter

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partial .bca file created - not sure what to do
« Reply #1 on: January 15, 2017, 02:05:18 AM »
Hey all!

I'm a noob with a noob question. Please - be gentle.

I started to create a BC Archive for a particular folder, and the process was interrupted. I hit cancel and figured I can give it another try later.

When I restarted my PC, I noticed a .bca file for the folder had been created anyway. When I look through it, it appears that many (but not all) the files are in the .bca. I figured I could delete it and start again, but I thought I'd ask the forum if you all thought it was safe to do so.

Again - it appears that the files in the .bca file are a *subset* of what's in the original folder, but I don't have enough time to do a thorough file by file comparison.

So - delete the .bca and retry? Or is there something else I should do?

Thanks!
 

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