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  #1  
Old 09-16-2018, 09:12
alexandernst alexandernst is offline
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Post Decrypt Plesk PHP files

This is a simple method for decrypting Plesk PHP files.

Trace "_efree" in "/usr/bin/sw-engine" with Frida, like this:


Code:
cd /usr/bin
frida-trace -i "_efree" ./sw-engine /opt/psa/admin/htdocs/index.php
Then edit the handler that Frida has generated for you. It should be located at

Code:
/usr/bin/__handlers__/sw_engine/_efree.js
Copy this inside the handler:

Code:
{
        onLeave: function (log, retval, state) {
                if (this.returnAddress == 0x9cc2d6) {
                        var s_addr = this.context.r15.add(128);
                        s_addr = Memory.readPointer(s_addr);
                        var s = Memory.readUtf8String(s_addr);
                        var fd = new File("/tmp/decrypted.php", "w");
                        fd.write(s);
                        fd.close();
                }
        }
}
Finally, run again the frida-trace command. You'll get the decrypted file in /tmp/decrypted.php

Note that this is for investigation purposes only. If you like Plesk, pay for it. I'm not responsible for any bad usage of this code.

Last edited by alexandernst; 09-16-2018 at 23:24. Reason: Fixing a bug
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  #2  
Old 03-06-2019, 05:55
ymg2006 ymg2006 is offline
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have you considered this approach in windows server ?
i could not locate sw-engine in windows server with plesk installed.
would you mind elaborate where this RVA(0x9cc2d6) comes from ?
thank's in advance
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Old 03-15-2019, 00:22
uel888 uel888 is offline
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any update of ymg2006 inquiry?
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Old 03-15-2019, 03:12
ymg2006 ymg2006 is offline
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Quote:
Originally Posted by uel888 View Post
any update of ymg2006 inquiry?
@alexandernst does this approach work with windows server to get plesk files decrypted ? anyone done this ?
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Old 05-06-2019, 00:23
KNARZ KNARZ is offline
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Just wanted to take a look in the plesk stuff but while trying to attach frida.

Code:
Failed to attach: unexpected error while attaching to process with pid XXXX (PTRACE_SEIZE returned 'Input/output error')
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Old 05-07-2019, 17:24
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Mahmoudnia Mahmoudnia is offline
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Hi
upload your php files that you want to decrypt
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Old 05-12-2019, 09:49
foosaa foosaa is offline
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Does the same method work for other protection tools like Zend, ioncube etc.? Thanks and please forgive if it's a naive question

Last edited by foosaa; 05-12-2019 at 09:49. Reason: Spelling
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Old 05-18-2019, 01:42
ymg2006 ymg2006 is offline
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Not working anymore

i fully tried this and confirming this is not working....
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Old 05-18-2019, 12:23
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if you have upload a sample , i can decrypt it for you
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Old 05-23-2019, 07:13
KNARZ KNARZ is offline
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I'm not sure what I'm looking for.. I just wanted to take a general look into it. Nothing specific. Also it's pretty hard to give you something to decrypt if we can't really point out (on our own) what would be the right file if we only could judge by filename.
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Old 05-26-2019, 17:05
ARUBA ARUBA is offline
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Quote:
Originally Posted by ymg2006 View Post
have you considered this approach in windows server ?
i could not locate sw-engine in windows server with plesk installed.
would you mind elaborate where this RVA(0x9cc2d6) comes from ?
thank's in advance
Please, read these:
_https://blog.silentsignal.eu/2013/12/18/plesk-decryption/
_https://gist.github.com/KenanSulayman/9050608
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Old 05-26-2019, 17:16
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Quote:
Originally Posted by ARUBA View Post
Please, read these:
_https://blog.silentsignal.eu/2013/12/18/plesk-decryption/
_https://gist.github.com/KenanSulayman/9050608
don't work on new version of plesk
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Old 05-26-2019, 17:29
ARUBA ARUBA is offline
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Quote:
Originally Posted by Mahmoudnia View Post
don't work on new version of plesk
I know, it works only for versions < 12.
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