PenTest Challenge Help

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Hi guys , i have PT challenge that i need help with …
i got encrypted file with no extension , the only thing i can read in it is the “This program cannot be run in DOS mode” line . tried decrypting in in several ways but no luck … any suggestions ? it really is important to me
will be happy to share the file with you

@hack41 said:

Hi guys , i have PT challenge that i need help with …
i got encrypted file with no extension , the only thing i can read in it is the “This program cannot be run in DOS mode” line . tried decrypting in in several ways but no luck … any suggestions ? it really is important to me
will be happy to share the file with you

At a guess, it isn’t encrypted - it’s a Windows executable file. The string you have is one of the signatures you’d look for (its magic bytes should be MZ if you look at it in xxd or another text editor).

You might be better trying some binary analysis on it.