Fun & Cryptos

[Ultimation]

There is no real area to put this sort of stuff so ill add it here.

What is it?
In my time of being extremely bored, i figured id do some simple encrypted pieces of data for you to try and decrypt. something to pass the time.

Rules

1. Break / Decode the values below to get the result
2. Any tools can be used.
3. If you decide to post your result, please post it in a Spoiler tag.

Happy hacking & cracking!


Crypto Number 1.
Clue: I LiXor the hex stuffz
Level: Easy

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

General Problem Solving Number 1:

Clues: ZipsCanBeOpenedEasilly
No Programming Tools Are Required!
Level: Easy


Keygen ME #1:
Clues: Your going to need ollydbg or a debugger
Clues: This was compiled with Delphi and has no protection.
Level:Easy
Rules: No file Patching or cracking, post keygen algo below:

Download the keygen me below:
Keygen ME #2:
Clues: Your going to need ollydbg or a debugger
Clues: This was compiled with Delphi and has no protection.
Level:Easy/Medium
Rules: No file Patching or cracking, post keygen algo below:

Download the keygen me below:
Download the keygen me below:


Keygen ME #3:
Clues: Your going to need ollydbg or a debugger
Clues: This was compiled with Delphi and has no protection.
Level:Easy/Medium
Rules: No file Patching or cracking, post keygen algo or valid keyfile below:

Download the keygen me below:

[_DreadNought_]

Awwwwwwwwww.

This could be fun, but i'll try number two, as you know

Good idea though, it'll be fun to see what others come up with.

[Lateralus]

 Spoiler

 _______ _______ _       _______ _______  ________________        _       _________________________ _______ _       _______ 
(  ____ \  ___  ) (    /|  ____ \  ____ )(  ___  )__   __/\     /| \     (  ___  )__   __/\__   __/(  ___  ) (    /|  ____ \
| (    \/ (   ) |  \  ( | (    \/ (    )|| (   ) |  ) (  | )   ( | (     | (   ) |  ) (      ) (   | (   ) |  \  ( | (    \/
| |     | |   | |   \ | | |     | (____)|| (___) |  | |  | |   | | |     | (___) |  | |      | |   | |   | |   \ | | (_____ 
| |     | |   | | (\ \) | | ____|     __)|  ___  |  | |  | |   | | |     |  ___  |  | |      | |   | |   | | (\ \) |_____  )
| |     | |   | | | \   | | \_  ) (\ (   | (   ) |  | |  | |   | | |     | (   ) |  | |      | |   | |   | | | \   |     ) |
| (____/\ (___) | )  \  | (___) | ) \ \__| )   ( |  | |  | (___) | (____/\ )   ( |  | |   ___) (___| (___) | )  \  |\____) |
(_______/_______)/    )_)_______)/   \__/|/     \|  )_(  (_______)_______//     \|  )_(   \_______/(_______)/    )_)_______)
                                                                                                                            

         _______            _______ ________________  ___________________ _ 
|\     /|  ___  )\     /|  (  ____ \  ___  )__   __/  \__   __/\__   __/ ) )
( \   / ) (   ) | )   ( |  | (    \/ (   ) |  ) (        ) (      ) (  | | |
 \ (_) /| |   | | |   | |  | |     | |   | |  | |        | |      | |  | | |
  \   / | |   | | |   | |  | | ____| |   | |  | |        | |      | |  | | |
   ) (  | |   | | |   | |  | | \_  ) |   | |  | |        | |      | |  (_)_)
   | |  | (___) | (___) |  | (___) | (___) |  | |     ___) (___   | |   _ _ 
   \_/  (_______)_______)  (_______)_______)  )_(     \_______/   )_(  (_)_)

[Ultimation]

Originally Posted by Lateralus

 Spoiler

 _______ _______ _       _______ _______  ________________        _       _________________________ _______ _       _______ 
(  ____ \  ___  ) (    /|  ____ \  ____ )(  ___  )__   __/\     /| \     (  ___  )__   __/\__   __/(  ___  ) (    /|  ____ \
| (    \/ (   ) |  \  ( | (    \/ (    )|| (   ) |  ) (  | )   ( | (     | (   ) |  ) (      ) (   | (   ) |  \  ( | (    \/
| |     | |   | |   \ | | |     | (____)|| (___) |  | |  | |   | | |     | (___) |  | |      | |   | |   | |   \ | | (_____ 
| |     | |   | | (\ \) | | ____|     __)|  ___  |  | |  | |   | | |     |  ___  |  | |      | |   | |   | | (\ \) |_____  )
| |     | |   | | | \   | | \_  ) (\ (   | (   ) |  | |  | |   | | |     | (   ) |  | |      | |   | |   | | | \   |     ) |
| (____/\ (___) | )  \  | (___) | ) \ \__| )   ( |  | |  | (___) | (____/\ )   ( |  | |   ___) (___| (___) | )  \  |\____) |
(_______/_______)/    )_)_______)/   \__/|/     \|  )_(  (_______)_______//     \|  )_(   \_______/(_______)/    )_)_______)
                                                                                                                            

         _______            _______ ________________  ___________________ _ 
|\     /|  ___  )\     /|  (  ____ \  ___  )__   __/  \__   __/\__   __/ ) )
( \   / ) (   ) | )   ( |  | (    \/ (   ) |  ) (        ) (      ) (  | | |
 \ (_) /| |   | | |   | |  | |     | |   | |  | |        | |      | |  | | |
  \   / | |   | | |   | |  | | ____| |   | |  | |        | |      | |  | | |
   ) (  | |   | | |   | |  | | \_  ) |   | |  | |        | |      | |  (_)_)
   | |  | (___) | (___) |  | (___) | (___) |  | |     ___) (___   | |   _ _ 
   \_/  (_______)_______)  (_______)_______)  )_(     \_______/   )_(  (_)_)

Very good :P

[Lateralus]

The second one is much easier than the first; I got it nearly instantly. Fun stuff.

[U2_Caparzo]

would be a good idea that ppl who got the answer explain how he get it? ofc if the want, so this can help a bit to ppl who don't know (like me :c )

[_DreadNought_]

All the answers are in the clues!

I LiXor the hex stuffz

[tkblackbelt]

Looks like I got the first one but the beginning looks fucked up. Did I get it?

 Spoiler

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace cracker
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = "20-5E-5D-5C-5B-5A-59-58-28-56-55-54-53-52-51-50-30-4E-32-33-34-35-36-37-38-46-45-44-43-42-41-40-00-7E-7D-7C-7B-7A-79-78-08-09-75-74-73-72-71-70-6F-6E-6D-6C-6B-6A-69-68-67-66-1A-1B-1C-1D-1E-1F-60-61-1D-63-64-65-66-67-68-69-15-14-13-12-11-10-0F-0E-0D-0C-0B-0A-09-08-07-06-05-04-03-02-01-00-3F-3E-3D-43-3B-3A-39-38-37-36-35-4B-33-4D-4E-4F-50-51-52-53-2B-2A-29-28-27-26-25-5B-71-77-56-5F-A0-DE-DD-DC-DB-A5-DA-A7-A8-D6-D5-D4-AC-AD-A7-AF-B8-B1-B2-B3-B4-BA-EA-B7-B8-C6-C5-C4-C3-BD-C2-BF-80-FE-FD-FC-FB-85-8F-8F-88-89-F5-F4-F3-8D-8E-86-EF-EE-92-93-94-EA-E9-98-E4-99-9A-9B-9C-9D-91-C3-E0-9D-E2-E3-E4-E5-E6-EF-E8-E9-95-94-93-ED-EE-E6-8F-8E-F2-F3-F4-8A-89-F8-84-86-85-FB-FC-FD-81-80-CF-C9-C2-C3-BB-BA-B9-C7-C8-C0-CA-C3-CC-CD-CE-CF-DF-8D-D2-D3-AB-AA-A9-A8-D8-A5-F7-F1-80-DD-D6-DF-20-21-22-5F-2B-25-2E-27-28-29-23-2B-70-2D-2E-53-30-31-3A-33-68-35-3E-37-38-39-3A-47-33-3D-36-3F-00-01-02-0A-58-59-06-0F-08-09-0A-02-0C-51-0E-0F-19-11-1A-13-14-49-16-1E-18-19-1A-13-1C-41-1E-17-60-61-62-63-64-39-66-6F-68-69-6A-62-6C-31-6E-6F-79-71-7A-73-74-75-76-77-78-70-7A-73-7C-7D-7E-23-40-49-42-43-44-4C-46-1B-48-49-36-4B-4C-45-4E-13-50-59-52-53-54-55-2A-58-75-73-06-5B-00-5D-5E-5F-A0-A1-FE-A3-F8-A5-A6-A7-F4-A9-F6-AB-AC-AD-D2-AF-EC-B1-EE-B3-E8-B5-B6-B7-B8-B9-E6-BB-B4-C2-C1-C0-FF-88-DE-DF-84-8D-F9-F8-F7-80-8A-D7-8C-8D-D2-8F-CC-91-92-CF-94-C9-96-97-98-C5-9A-C7-9C-C1-9E-9F-E0-E1-E2-BF-E4-ED-99-98-97-E0-EA-B7-EC-ED-B2-EF-AC-F1-F2-F3-F4-F5-F6-AB-F8-A5-FA-FB-FC-A1-FE-A3-C0-C1-C2-9F-C4-99-C6-C7-C8-B5-CA-97-CC-91-CE-C7-AF-AE-AD-AC-AB-D5-FB-FD-84-D9-86-DB-DC-DD-DE-DF-7C-21-7E-23-24-25-7A-27-74-29-22-57-2C-51-27-2F-6C-31-6E-33-4B-4A-49-48-64-39-3A-3B-3C-3D-41-40-09-5D-02-03-7B-7A-79-07-08-55-0A-0B-50-0D-52-0F-10-4D-12-4F-14-15-16-4B-18-45-1A-47-1C-1D-1E-1F-60-3D-62-63-1B-1A-19-67-68-35-6A-6B-30-6D-32-6F-70-71-72-73-74-29-76-2B-78-79-7A-27-7C-21-7E-7F-40-1D-42-1F-44-4D-3A-47-34-40-4A-17-33-32-31-30-2F-51-52-5A-79-7F-0A-57-04-59-5A-5B-5C-5D-02-5F-FC-A1-A2-A3-F8-A5-FA-A7-F4-A9-D6-AB-AC-AD-F2-AF-EC-B1-CE-CC-B4-B5-BF-B7-B0-C5-BA-B3-BC-BD-BE-E3-80-89-82-83-84-8C-86-DB-88-89-D6-8B-D0-8D-8E-D3-90-CD-92-93-94-C9-96-CB-98-C5-9A-9B-9C-9D-9E-C3-E0-E9-E2-E3-E4-EC-E6-BB-E8-E9-B6-EB-B0-ED-EE-EF-F0-F1-F2-AF-F4-A9-F6-F7-F8-A5-FA-A7-FC-FD-FE-A3-C0-9D-C2-9F-C4-B9-C6-C7-C8-95-CA-CB-CC-CD-CE-C6-D0-8D-FF-F9-88-D5-DE-A8-A7-A6-A5-D4-A0-DD-D6-A0-5F-5E-2B-23-78-25-2F-27-28-55-2A-2B-70-2D-26-50-4F-4E-3B-33-68-35-3F-37-44-39-46-44-43-61-3E-36-00-01-02-0B-04-59-06-07-54-09-56-0B-0C-51-0E-07-6F-6E-6D-1A-14-49-16-1F-67-66-65-64-13-61-1E-16-60-61-62-6B-64-39-66-67-34-69-36-6B-6C-6D-11-10-0F-78-72-7B-0B-0A-09-2B-78-71-05-04-03-74-7E-23-40-48-42-43-38-45-46-1B-34-36-35-34-33-44-4E-13-7D-7B-5A-2C-2B-2A-29-28-27-26-55-24-23-22-21-20-DF-DE-AB-AC-A4-A5-A6-A7-A1-D6-A3-D4-D3-D2-D1-D0-CF-CE-BB-BC-B4-B5-B6-CB-C7-C6-B5-E7-B3-BD-BE-BF-80-81-FE-DF-84-85-8F-F8-80-89-8A-83-F3-F2-F1-F0-EF-EE-ED-9A-EB-EA-E9-E8-E7-E6-E5-94-93-9D-9E-9F-E0-E1-9E-BF-E4-E5-EF-98-E0-E9-EA-EB-90-92-91-90-8F-8E-8D-8C-FB-FD-89-88-87-86-85-84-83-F4-F1-FF-C0-C1-C2-CA-BB-CC-B9-B8-B7-B6-B5-B4-B3-C4-E3-E5-D0-D1-D2-D3-D4-D5-D6-D7-D8-D9-DA-DB-DC-DD-DE-DF-20-21-22-23-24-25-26-27-28-29-2A-2B-2C-2D-2E-2F-30-31-32-33-34-35-36-37-38-39-3A-3B-3C-3D-3E-3F-00-01-02-03-04-05-06-07-08-09-0A-0B-0C-0D-0E-0F-10-11-12-13-14-15-16-17-18-19-1A-1B-1C-1D-1E-1F-60-61-62-63-64-65-66-67-68-69-6A-6B-6C-6D-6E-6F-70-71-72-73-74-75-76-77-78-79-7A-7B-7C-7D-7E-7F-40-41-42-43-44-45-46-47-48-49-4A-4B-61-67-63-65-50-51-52-53-54-55-56-57-58-26-25-24-23-22-21-20-A0-A1-A2-A3-A4-A5-A6-A7-A8-A9-AA-AB-D3-D2-D1-D0-CF-CE-CD-B3-CB-CA-C9-C8-C7-C6-C5-C4-C3-C2-C1-C0-FF-FE-FD-FC-84-85-F9-F8-F7-F6-F5-F4-F3-F2-F1-F0-EF-EE-ED-EC-EB-EA-E9-E8-E7-99-E5-9B-B1-B7-C2-E3-E0-E1-E2-E3-E4-EA-BA-E7-E8-96-95-94-EC-ED-E7-93-F0-F1-F2-F3-F4-FA-AA-F7-F8-F1-FA-FB-83-82-81-80-C0-BD-C2-C3-BB-BA-B9-C7-C8-C0-B5-B4-CC-CD-CE-B0-AF-DE-D2-D3-A8-AA-A9-D7-D8-D9-A5-A4-D3-A1-A1-A0-20-21-22-5C-5B-2A-26-2E-28-20-07-01-24-2D-52-2F-30-31-3D-33-3D-35-3E-37-38-39-33-3B-60-3D-37-3F-00-01-0A-03-58-05-06-5B-08-01-0A-0B-0C-0D-72-00-10-19-12-13-14-1C-16-4B-18-19-13-1B-14-1D-1E-1F-60-61-62-63-64-6C-66-6F-68-69-6A-6B-6C-6D-67-6F-78-71-72-2F-74-29-76-2B-55-53-7A-07-7C-75-01-76-40-4E-1E-43-18-45-46-47-14-49-16-4B-10-4D-4E-4F-0C-51-0E-53-54-09-56-0B-58-59-5A-5B-5C-01-5E-03-A0-A1-A2-FF-A4-F9-A6-A7-F4-A9-F6-AB-AC-AD-AE-AF-B0-B1-B2-EF-B4-E9-B6-B7-B8-B9-BA-BB-E0-BD-E2-BF-80-DD-82-DF-84-D9-AB-AD-88-89-F6-8B-8C-8D-81-8F-CC-91-CE-93-94-95-CA-97-C4-99-C6-9B-9C-9D-C2-9F-BC-E1-E2-BF-E4-B9-E6-98-97-96-95-B7-EC-B1-EE-EF-F0-AD-F2-AF-F4-F5-AA-F7-A4-F9-FA-FB-FC-FD-FE-FF-C0-9D-C2-9F-C4-C5-C6-C7-C8-C9-96-CB-90-CD-CE-93-D0-8D-D2-8F-F9-FF-D6-D7-D8-D0-DA-D3-DC-DD-82-DF-7C-21-22-23-78-25-7A-27-74-29-2A-2B-70-2D-72-2F-30-6D-32-6F-34-49-49-37-38-30-3A-67-3C-3D-3E-63-00-5D-02-03-58-05-5A-07-08-09-0A-0B-0C-0D-0E-53-10-4D-12-13-14-15-16-17-44-19-46-1B-1C-15-61-16-1F-68-4F-49-64-65-66-3B-68-35-6A-6B-30-6D-66-10-0F-0E-7B-73-28-75-7E-08-07-06-73-7B-20-7D-7E-23-40-49-3D-3C-3B-4C-46-1B-48-41-35-34-33-44-4E-13-50-51-0E-53-08-55-56-57-58-59-25-24-23-54-5E-57-DF-DE-DD-A3-A4-A5-FA-A7-F4-A9-AA-AB-D3-AD-D1-AF-9D-9B-B2-B3-B4-C9-C9-B8-B8-B9-B2-C4-C3-C2-C1-C0-FF-FE-8B-FC-FB-FA-F9-F8-F7-F6-83-8B-8C-85-F1-F0-EF-EE-ED-EC-EB-9C-E9-E8-E7-E6-E5-E4-E3-94-9E-9F-E9-9E-EA-E3-E4-E5-E6-E7-94-96-95-94-93-92-91-90-FF-F1-F2-F3-FD-8A-FE-F7-F8-F1-85-F2-83-F4-D3-D5-C0-C1-C2-C3-C4-C5-C6-C7-C8-C9-CA-CB-CC-CD-CE-CF-D0-D1-D2-D3-D4-D5-D6-D7-D8-D9-DA-DB-DC-DD-DE-DF-20-21-22-23-24-25-26-27-28-29-2A-2B-2C-2D-2E-2F-30-31-32-33-34-35-36-37-38-39-3A-3B-3C-3D-3E-3F-00-01-02-03-04-05-06-07-08-09-0A-0B-21-27";
            string []split = s.Split('-');

            byte[] hex = new byte[split.Length];

            for (int i = 0; i < split.Length; i++)
            {

                hex[i] = Convert.ToByte(split[i],16);
                hex[i] = ((byte)(hex[i] ^ i));
            }

            Console.WriteLine(Encoding.ASCII.GetString(hex));
            Console.ReadKey();
        }
    }
}

[InfamousNoone]

@tkblackbelt: It's likely because the console screen is too small.

 Spoiler

let text = "20-5E-5D-5C-5B-5A-59-58-28-56-55-54-53-52-51-50-30-4E-32-33-34-35-36-37-38-46-45-44-43-42-41-40-00-7E-7D-7C-7B-7A-79-78-08-09-75-74-73-72-71-70-6F-6E-6D-6C-6B-6A-69-68-67-66-1A-1B-1C-1D-1E-1F-60-61-1D-63-64-65-66-67-68-69-15-14-13-12-11-10-0F-0E-0D-0C-0B-0A-09-08-07-06-05-04-03-02-01-00-3F-3E-3D-43-3B-3A-39-38-37-36-35-4B-33-4D-4E-4F-50-51-52-53-2B-2A-29-28-27-26-25-5B-71-77-56-5F-A0-DE-DD-DC-DB-A5-DA-A7-A8-D6-D5-D4-AC-AD-A7-AF-B8-B1-B2-B3-B4-BA-EA-B7-B8-C6-C5-C4-C3-BD-C2-BF-80-FE-FD-FC-FB-85-8F-8F-88-89-F5-F4-F3-8D-8E-86-EF-EE-92-93-94-EA-E9-98-E4-99-9A-9B-9C-9D-91-C3-E0-9D-E2-E3-E4-E5-E6-EF-E8-E9-95-94-93-ED-EE-E6-8F-8E-F2-F3-F4-8A-89-F8-84-86-85-FB-FC-FD-81-80-CF-C9-C2-C3-BB-BA-B9-C7-C8-C0-CA-C3-CC-CD-CE-CF-DF-8D-D2-D3-AB-AA-A9-A8-D8-A5-F7-F1-80-DD-D6-DF-20-21-22-5F-2B-25-2E-27-28-29-23-2B-70-2D-2E-53-30-31-3A-33-68-35-3E-37-38-39-3A-47-33-3D-36-3F-00-01-02-0A-58-59-06-0F-08-09-0A-02-0C-51-0E-0F-19-11-1A-13-14-49-16-1E-18-19-1A-13-1C-41-1E-17-60-61-62-63-64-39-66-6F-68-69-6A-62-6C-31-6E-6F-79-71-7A-73-74-75-76-77-78-70-7A-73-7C-7D-7E-23-40-49-42-43-44-4C-46-1B-48-49-36-4B-4C-45-4E-13-50-59-52-53-54-55-2A-58-75-73-06-5B-00-5D-5E-5F-A0-A1-FE-A3-F8-A5-A6-A7-F4-A9-F6-AB-AC-AD-D2-AF-EC-B1-EE-B3-E8-B5-B6-B7-B8-B9-E6-BB-B4-C2-C1-C0-FF-88-DE-DF-84-8D-F9-F8-F7-80-8A-D7-8C-8D-D2-8F-CC-91-92-CF-94-C9-96-97-98-C5-9A-C7-9C-C1-9E-9F-E0-E1-E2-BF-E4-ED-99-98-97-E0-EA-B7-EC-ED-B2-EF-AC-F1-F2-F3-F4-F5-F6-AB-F8-A5-FA-FB-FC-A1-FE-A3-C0-C1-C2-9F-C4-99-C6-C7-C8-B5-CA-97-CC-91-CE-C7-AF-AE-AD-AC-AB-D5-FB-FD-84-D9-86-DB-DC-DD-DE-DF-7C-21-7E-23-24-25-7A-27-74-29-22-57-2C-51-27-2F-6C-31-6E-33-4B-4A-49-48-64-39-3A-3B-3C-3D-41-40-09-5D-02-03-7B-7A-79-07-08-55-0A-0B-50-0D-52-0F-10-4D-12-4F-14-15-16-4B-18-45-1A-47-1C-1D-1E-1F-60-3D-62-63-1B-1A-19-67-68-35-6A-6B-30-6D-32-6F-70-71-72-73-74-29-76-2B-78-79-7A-27-7C-21-7E-7F-40-1D-42-1F-44-4D-3A-47-34-40-4A-17-33-32-31-30-2F-51-52-5A-79-7F-0A-57-04-59-5A-5B-5C-5D-02-5F-FC-A1-A2-A3-F8-A5-FA-A7-F4-A9-D6-AB-AC-AD-F2-AF-EC-B1-CE-CC-B4-B5-BF-B7-B0-C5-BA-B3-BC-BD-BE-E3-80-89-82-83-84-8C-86-DB-88-89-D6-8B-D0-8D-8E-D3-90-CD-92-93-94-C9-96-CB-98-C5-9A-9B-9C-9D-9E-C3-E0-E9-E2-E3-E4-EC-E6-BB-E8-E9-B6-EB-B0-ED-EE-EF-F0-F1-F2-AF-F4-A9-F6-F7-F8-A5-FA-A7-FC-FD-FE-A3-C0-9D-C2-9F-C4-B9-C6-C7-C8-95-CA-CB-CC-CD-CE-C6-D0-8D-FF-F9-88-D5-DE-A8-A7-A6-A5-D4-A0-DD-D6-A0-5F-5E-2B-23-78-25-2F-27-28-55-2A-2B-70-2D-26-50-4F-4E-3B-33-68-35-3F-37-44-39-46-44-43-61-3E-36-00-01-02-0B-04-59-06-07-54-09-56-0B-0C-51-0E-07-6F-6E-6D-1A-14-49-16-1F-67-66-65-64-13-61-1E-16-60-61-62-6B-64-39-66-67-34-69-36-6B-6C-6D-11-10-0F-78-72-7B-0B-0A-09-2B-78-71-05-04-03-74-7E-23-40-48-42-43-38-45-46-1B-34-36-35-34-33-44-4E-13-7D-7B-5A-2C-2B-2A-29-28-27-26-55-24-23-22-21-20-DF-DE-AB-AC-A4-A5-A6-A7-A1-D6-A3-D4-D3-D2-D1-D0-CF-CE-BB-BC-B4-B5-B6-CB-C7-C6-B5-E7-B3-BD-BE-BF-80-81-FE-DF-84-85-8F-F8-80-89-8A-83-F3-F2-F1-F0-EF-EE-ED-9A-EB-EA-E9-E8-E7-E6-E5-94-93-9D-9E-9F-E0-E1-9E-BF-E4-E5-EF-98-E0-E9-EA-EB-90-92-91-90-8F-8E-8D-8C-FB-FD-89-88-87-86-85-84-83-F4-F1-FF-C0-C1-C2-CA-BB-CC-B9-B8-B7-B6-B5-B4-B3-C4-E3-E5-D0-D1-D2-D3-D4-D5-D6-D7-D8-D9-DA-DB-DC-DD-DE-DF-20-21-22-23-24-25-26-27-28-29-2A-2B-2C-2D-2E-2F-30-31-32-33-34-35-36-37-38-39-3A-3B-3C-3D-3E-3F-00-01-02-03-04-05-06-07-08-09-0A-0B-0C-0D-0E-0F-10-11-12-13-14-15-16-17-18-19-1A-1B-1C-1D-1E-1F-60-61-62-63-64-65-66-67-68-69-6A-6B-6C-6D-6E-6F-70-71-72-73-74-75-76-77-78-79-7A-7B-7C-7D-7E-7F-40-41-42-43-44-45-46-47-48-49-4A-4B-61-67-63-65-50-51-52-53-54-55-56-57-58-26-25-24-23-22-21-20-A0-A1-A2-A3-A4-A5-A6-A7-A8-A9-AA-AB-D3-D2-D1-D0-CF-CE-CD-B3-CB-CA-C9-C8-C7-C6-C5-C4-C3-C2-C1-C0-FF-FE-FD-FC-84-85-F9-F8-F7-F6-F5-F4-F3-F2-F1-F0-EF-EE-ED-EC-EB-EA-E9-E8-E7-99-E5-9B-B1-B7-C2-E3-E0-E1-E2-E3-E4-EA-BA-E7-E8-96-95-94-EC-ED-E7-93-F0-F1-F2-F3-F4-FA-AA-F7-F8-F1-FA-FB-83-82-81-80-C0-BD-C2-C3-BB-BA-B9-C7-C8-C0-B5-B4-CC-CD-CE-B0-AF-DE-D2-D3-A8-AA-A9-D7-D8-D9-A5-A4-D3-A1-A1-A0-20-21-22-5C-5B-2A-26-2E-28-20-07-01-24-2D-52-2F-30-31-3D-33-3D-35-3E-37-38-39-33-3B-60-3D-37-3F-00-01-0A-03-58-05-06-5B-08-01-0A-0B-0C-0D-72-00-10-19-12-13-14-1C-16-4B-18-19-13-1B-14-1D-1E-1F-60-61-62-63-64-6C-66-6F-68-69-6A-6B-6C-6D-67-6F-78-71-72-2F-74-29-76-2B-55-53-7A-07-7C-75-01-76-40-4E-1E-43-18-45-46-47-14-49-16-4B-10-4D-4E-4F-0C-51-0E-53-54-09-56-0B-58-59-5A-5B-5C-01-5E-03-A0-A1-A2-FF-A4-F9-A6-A7-F4-A9-F6-AB-AC-AD-AE-AF-B0-B1-B2-EF-B4-E9-B6-B7-B8-B9-BA-BB-E0-BD-E2-BF-80-DD-82-DF-84-D9-AB-AD-88-89-F6-8B-8C-8D-81-8F-CC-91-CE-93-94-95-CA-97-C4-99-C6-9B-9C-9D-C2-9F-BC-E1-E2-BF-E4-B9-E6-98-97-96-95-B7-EC-B1-EE-EF-F0-AD-F2-AF-F4-F5-AA-F7-A4-F9-FA-FB-FC-FD-FE-FF-C0-9D-C2-9F-C4-C5-C6-C7-C8-C9-96-CB-90-CD-CE-93-D0-8D-D2-8F-F9-FF-D6-D7-D8-D0-DA-D3-DC-DD-82-DF-7C-21-22-23-78-25-7A-27-74-29-2A-2B-70-2D-72-2F-30-6D-32-6F-34-49-49-37-38-30-3A-67-3C-3D-3E-63-00-5D-02-03-58-05-5A-07-08-09-0A-0B-0C-0D-0E-53-10-4D-12-13-14-15-16-17-44-19-46-1B-1C-15-61-16-1F-68-4F-49-64-65-66-3B-68-35-6A-6B-30-6D-66-10-0F-0E-7B-73-28-75-7E-08-07-06-73-7B-20-7D-7E-23-40-49-3D-3C-3B-4C-46-1B-48-41-35-34-33-44-4E-13-50-51-0E-53-08-55-56-57-58-59-25-24-23-54-5E-57-DF-DE-DD-A3-A4-A5-FA-A7-F4-A9-AA-AB-D3-AD-D1-AF-9D-9B-B2-B3-B4-C9-C9-B8-B8-B9-B2-C4-C3-C2-C1-C0-FF-FE-8B-FC-FB-FA-F9-F8-F7-F6-83-8B-8C-85-F1-F0-EF-EE-ED-EC-EB-9C-E9-E8-E7-E6-E5-E4-E3-94-9E-9F-E9-9E-EA-E3-E4-E5-E6-E7-94-96-95-94-93-92-91-90-FF-F1-F2-F3-FD-8A-FE-F7-F8-F1-85-F2-83-F4-D3-D5-C0-C1-C2-C3-C4-C5-C6-C7-C8-C9-CA-CB-CC-CD-CE-CF-D0-D1-D2-D3-D4-D5-D6-D7-D8-D9-DA-DB-DC-DD-DE-DF-20-21-22-23-24-25-26-27-28-29-2A-2B-2C-2D-2E-2F-30-31-32-33-34-35-36-37-38-39-3A-3B-3C-3D-3E-3F-00-01-02-03-04-05-06-07-08-09-0A-0B-21-27"
let sln = 
    text.Split('-')
    |> Array.mapi(fun i str -> Byte.Parse(str, NumberStyles.HexNumber) ^^^ (byte i))
File.WriteAllBytes ("d:\\test.txt", sln)

 Spoiler

The second file is actually a compressed file. It can be decompressed using software such as WinRAR,
or for example like I used,

Good luck!

[tkblackbelt]

Originally Posted by InfamousNoone

@tkblackbelt: It's likely because the console screen is too small.

 Spoiler

let text = "20-5E-5D-5C-5B-5A-59-58-28-56-55-54-53-52-51-50-30-4E-32-33-34-35-36-37-38-46-45-44-43-42-41-40-00-7E-7D-7C-7B-7A-79-78-08-09-75-74-73-72-71-70-6F-6E-6D-6C-6B-6A-69-68-67-66-1A-1B-1C-1D-1E-1F-60-61-1D-63-64-65-66-67-68-69-15-14-13-12-11-10-0F-0E-0D-0C-0B-0A-09-08-07-06-05-04-03-02-01-00-3F-3E-3D-43-3B-3A-39-38-37-36-35-4B-33-4D-4E-4F-50-51-52-53-2B-2A-29-28-27-26-25-5B-71-77-56-5F-A0-DE-DD-DC-DB-A5-DA-A7-A8-D6-D5-D4-AC-AD-A7-AF-B8-B1-B2-B3-B4-BA-EA-B7-B8-C6-C5-C4-C3-BD-C2-BF-80-FE-FD-FC-FB-85-8F-8F-88-89-F5-F4-F3-8D-8E-86-EF-EE-92-93-94-EA-E9-98-E4-99-9A-9B-9C-9D-91-C3-E0-9D-E2-E3-E4-E5-E6-EF-E8-E9-95-94-93-ED-EE-E6-8F-8E-F2-F3-F4-8A-89-F8-84-86-85-FB-FC-FD-81-80-CF-C9-C2-C3-BB-BA-B9-C7-C8-C0-CA-C3-CC-CD-CE-CF-DF-8D-D2-D3-AB-AA-A9-A8-D8-A5-F7-F1-80-DD-D6-DF-20-21-22-5F-2B-25-2E-27-28-29-23-2B-70-2D-2E-53-30-31-3A-33-68-35-3E-37-38-39-3A-47-33-3D-36-3F-00-01-02-0A-58-59-06-0F-08-09-0A-02-0C-51-0E-0F-19-11-1A-13-14-49-16-1E-18-19-1A-13-1C-41-1E-17-60-61-62-63-64-39-66-6F-68-69-6A-62-6C-31-6E-6F-79-71-7A-73-74-75-76-77-78-70-7A-73-7C-7D-7E-23-40-49-42-43-44-4C-46-1B-48-49-36-4B-4C-45-4E-13-50-59-52-53-54-55-2A-58-75-73-06-5B-00-5D-5E-5F-A0-A1-FE-A3-F8-A5-A6-A7-F4-A9-F6-AB-AC-AD-D2-AF-EC-B1-EE-B3-E8-B5-B6-B7-B8-B9-E6-BB-B4-C2-C1-C0-FF-88-DE-DF-84-8D-F9-F8-F7-80-8A-D7-8C-8D-D2-8F-CC-91-92-CF-94-C9-96-97-98-C5-9A-C7-9C-C1-9E-9F-E0-E1-E2-BF-E4-ED-99-98-97-E0-EA-B7-EC-ED-B2-EF-AC-F1-F2-F3-F4-F5-F6-AB-F8-A5-FA-FB-FC-A1-FE-A3-C0-C1-C2-9F-C4-99-C6-C7-C8-B5-CA-97-CC-91-CE-C7-AF-AE-AD-AC-AB-D5-FB-FD-84-D9-86-DB-DC-DD-DE-DF-7C-21-7E-23-24-25-7A-27-74-29-22-57-2C-51-27-2F-6C-31-6E-33-4B-4A-49-48-64-39-3A-3B-3C-3D-41-40-09-5D-02-03-7B-7A-79-07-08-55-0A-0B-50-0D-52-0F-10-4D-12-4F-14-15-16-4B-18-45-1A-47-1C-1D-1E-1F-60-3D-62-63-1B-1A-19-67-68-35-6A-6B-30-6D-32-6F-70-71-72-73-74-29-76-2B-78-79-7A-27-7C-21-7E-7F-40-1D-42-1F-44-4D-3A-47-34-40-4A-17-33-32-31-30-2F-51-52-5A-79-7F-0A-57-04-59-5A-5B-5C-5D-02-5F-FC-A1-A2-A3-F8-A5-FA-A7-F4-A9-D6-AB-AC-AD-F2-AF-EC-B1-CE-CC-B4-B5-BF-B7-B0-C5-BA-B3-BC-BD-BE-E3-80-89-82-83-84-8C-86-DB-88-89-D6-8B-D0-8D-8E-D3-90-CD-92-93-94-C9-96-CB-98-C5-9A-9B-9C-9D-9E-C3-E0-E9-E2-E3-E4-EC-E6-BB-E8-E9-B6-EB-B0-ED-EE-EF-F0-F1-F2-AF-F4-A9-F6-F7-F8-A5-FA-A7-FC-FD-FE-A3-C0-9D-C2-9F-C4-B9-C6-C7-C8-95-CA-CB-CC-CD-CE-C6-D0-8D-FF-F9-88-D5-DE-A8-A7-A6-A5-D4-A0-DD-D6-A0-5F-5E-2B-23-78-25-2F-27-28-55-2A-2B-70-2D-26-50-4F-4E-3B-33-68-35-3F-37-44-39-46-44-43-61-3E-36-00-01-02-0B-04-59-06-07-54-09-56-0B-0C-51-0E-07-6F-6E-6D-1A-14-49-16-1F-67-66-65-64-13-61-1E-16-60-61-62-6B-64-39-66-67-34-69-36-6B-6C-6D-11-10-0F-78-72-7B-0B-0A-09-2B-78-71-05-04-03-74-7E-23-40-48-42-43-38-45-46-1B-34-36-35-34-33-44-4E-13-7D-7B-5A-2C-2B-2A-29-28-27-26-55-24-23-22-21-20-DF-DE-AB-AC-A4-A5-A6-A7-A1-D6-A3-D4-D3-D2-D1-D0-CF-CE-BB-BC-B4-B5-B6-CB-C7-C6-B5-E7-B3-BD-BE-BF-80-81-FE-DF-84-85-8F-F8-80-89-8A-83-F3-F2-F1-F0-EF-EE-ED-9A-EB-EA-E9-E8-E7-E6-E5-94-93-9D-9E-9F-E0-E1-9E-BF-E4-E5-EF-98-E0-E9-EA-EB-90-92-91-90-8F-8E-8D-8C-FB-FD-89-88-87-86-85-84-83-F4-F1-FF-C0-C1-C2-CA-BB-CC-B9-B8-B7-B6-B5-B4-B3-C4-E3-E5-D0-D1-D2-D3-D4-D5-D6-D7-D8-D9-DA-DB-DC-DD-DE-DF-20-21-22-23-24-25-26-27-28-29-2A-2B-2C-2D-2E-2F-30-31-32-33-34-35-36-37-38-39-3A-3B-3C-3D-3E-3F-00-01-02-03-04-05-06-07-08-09-0A-0B-0C-0D-0E-0F-10-11-12-13-14-15-16-17-18-19-1A-1B-1C-1D-1E-1F-60-61-62-63-64-65-66-67-68-69-6A-6B-6C-6D-6E-6F-70-71-72-73-74-75-76-77-78-79-7A-7B-7C-7D-7E-7F-40-41-42-43-44-45-46-47-48-49-4A-4B-61-67-63-65-50-51-52-53-54-55-56-57-58-26-25-24-23-22-21-20-A0-A1-A2-A3-A4-A5-A6-A7-A8-A9-AA-AB-D3-D2-D1-D0-CF-CE-CD-B3-CB-CA-C9-C8-C7-C6-C5-C4-C3-C2-C1-C0-FF-FE-FD-FC-84-85-F9-F8-F7-F6-F5-F4-F3-F2-F1-F0-EF-EE-ED-EC-EB-EA-E9-E8-E7-99-E5-9B-B1-B7-C2-E3-E0-E1-E2-E3-E4-EA-BA-E7-E8-96-95-94-EC-ED-E7-93-F0-F1-F2-F3-F4-FA-AA-F7-F8-F1-FA-FB-83-82-81-80-C0-BD-C2-C3-BB-BA-B9-C7-C8-C0-B5-B4-CC-CD-CE-B0-AF-DE-D2-D3-A8-AA-A9-D7-D8-D9-A5-A4-D3-A1-A1-A0-20-21-22-5C-5B-2A-26-2E-28-20-07-01-24-2D-52-2F-30-31-3D-33-3D-35-3E-37-38-39-33-3B-60-3D-37-3F-00-01-0A-03-58-05-06-5B-08-01-0A-0B-0C-0D-72-00-10-19-12-13-14-1C-16-4B-18-19-13-1B-14-1D-1E-1F-60-61-62-63-64-6C-66-6F-68-69-6A-6B-6C-6D-67-6F-78-71-72-2F-74-29-76-2B-55-53-7A-07-7C-75-01-76-40-4E-1E-43-18-45-46-47-14-49-16-4B-10-4D-4E-4F-0C-51-0E-53-54-09-56-0B-58-59-5A-5B-5C-01-5E-03-A0-A1-A2-FF-A4-F9-A6-A7-F4-A9-F6-AB-AC-AD-AE-AF-B0-B1-B2-EF-B4-E9-B6-B7-B8-B9-BA-BB-E0-BD-E2-BF-80-DD-82-DF-84-D9-AB-AD-88-89-F6-8B-8C-8D-81-8F-CC-91-CE-93-94-95-CA-97-C4-99-C6-9B-9C-9D-C2-9F-BC-E1-E2-BF-E4-B9-E6-98-97-96-95-B7-EC-B1-EE-EF-F0-AD-F2-AF-F4-F5-AA-F7-A4-F9-FA-FB-FC-FD-FE-FF-C0-9D-C2-9F-C4-C5-C6-C7-C8-C9-96-CB-90-CD-CE-93-D0-8D-D2-8F-F9-FF-D6-D7-D8-D0-DA-D3-DC-DD-82-DF-7C-21-22-23-78-25-7A-27-74-29-2A-2B-70-2D-72-2F-30-6D-32-6F-34-49-49-37-38-30-3A-67-3C-3D-3E-63-00-5D-02-03-58-05-5A-07-08-09-0A-0B-0C-0D-0E-53-10-4D-12-13-14-15-16-17-44-19-46-1B-1C-15-61-16-1F-68-4F-49-64-65-66-3B-68-35-6A-6B-30-6D-66-10-0F-0E-7B-73-28-75-7E-08-07-06-73-7B-20-7D-7E-23-40-49-3D-3C-3B-4C-46-1B-48-41-35-34-33-44-4E-13-50-51-0E-53-08-55-56-57-58-59-25-24-23-54-5E-57-DF-DE-DD-A3-A4-A5-FA-A7-F4-A9-AA-AB-D3-AD-D1-AF-9D-9B-B2-B3-B4-C9-C9-B8-B8-B9-B2-C4-C3-C2-C1-C0-FF-FE-8B-FC-FB-FA-F9-F8-F7-F6-83-8B-8C-85-F1-F0-EF-EE-ED-EC-EB-9C-E9-E8-E7-E6-E5-E4-E3-94-9E-9F-E9-9E-EA-E3-E4-E5-E6-E7-94-96-95-94-93-92-91-90-FF-F1-F2-F3-FD-8A-FE-F7-F8-F1-85-F2-83-F4-D3-D5-C0-C1-C2-C3-C4-C5-C6-C7-C8-C9-CA-CB-CC-CD-CE-CF-D0-D1-D2-D3-D4-D5-D6-D7-D8-D9-DA-DB-DC-DD-DE-DF-20-21-22-23-24-25-26-27-28-29-2A-2B-2C-2D-2E-2F-30-31-32-33-34-35-36-37-38-39-3A-3B-3C-3D-3E-3F-00-01-02-03-04-05-06-07-08-09-0A-0B-21-27"
let sln = 
    text.Split('-')
    |> Array.mapi(fun i str -> Byte.Parse(str, NumberStyles.HexNumber) ^^^ (byte i))
File.WriteAllBytes ("d:\\test.txt", sln)

 Spoiler

The second file is actually a compressed file. It can be decompressed using software such as WinRAR,
or for example like I used,

Good luck!

Ya that was it, I dumped it to a file and it was correct. Just curious though is that F#?

[Nullable]

Might as well contribute something.

MTP
Clue:
Here's the code that generated the ciphertext:

string EncryptMessageAndConvertToHex(string Message, int Key)
        {
            int Index = 0;
            string Result = string.Empty;
            byte[] ByteKey = BitConverter.GetBytes(Key);
            while (Index < Message.Length)
            {
                for (int i = 0; i < 4; ++i)
                {
                    if (Index + i >= Message.Length)
                        break;
                    Result += ((byte)(Message[Index + i] ^ (byte)(ByteKey[i]))).ToString("x2");
                }
                Index += 4;
            }
            return Result;
        }

Edit:
Another clue, (x xor c) xor c = x
Level:
Hard enough.

And here's the generated cipher text:

7c42671e4d4c645b0549775d5754624a4049324a4d483253405e615f4248324d504e715b565e744b49416b1f056e7d50425f734a5041734a4c427c4d04

[Micro_Mouse]

Originally Posted by tkblackbelt

Ya that was it, I dumped it to a file and it was correct. Just curious though is that F#?

Yeah its f#.

[Ultimation]

Originally Posted by Nullable

Might as well contribute something.

MTP
Clue:
Here's the code that generated the ciphertext:

string EncryptMessageAndConvertToHex(string Message, int Key)
        {
            string Result = string.Empty;
            byte[] ByteKey = BitConverter.GetBytes(Key);
            while (Index < Message.Length)
            {
                for (int i = 0; i < 4; ++i)
                {
                    if (Index + i >= Message.Length)
                        break;
                    Result += ((byte)(Message[Index + i] ^ (byte)(ByteKey[i]))).ToString("x2");
                }
                Index += 4;
            }
            return Result;
        }

Edit:
Another clue, (x xor c) xor c = x
Level:
Hard enough.

And here's the generated cipher text:

7c42671e4d4c645b0549775d5754624a4049324a4d483253405e615f4248324d504e715b565e744b49416b1f056e7d50425f734a5041734a4c427c4d04

lets give it a go! ( First impressions, the key must only be 4 bytes)

omg i need another clue. lol!

PS: your code would be better like

string EncryptMessageAndConvertToHex(string Message, int Key)
        {
            int Index = 0;
            string Result = string.Empty;
            byte[] ByteKey = BitConverter.GetBytes(Key);
           
for (int i =0;i < Message.Length;i++)
{
Result += ((byte)(Message[i] ^ (byte)(ByteKey[i%4]))).ToString("x2");
}
return Result;
}

[InfamousNoone]

@Nullable:

 Spoiler

Key: 1041378597
Result: You have decrypted the message successfully! Congratulations!
Completed analysis!
Press any key to continue . . .

//
// This isn't going to be an elegant solution.
//

let str = "7c42671e4d4c645b0549775d5754624a4049324a4d483253405e615f4248324d504e715b565e744b49416b1f056e7d50425f734a5041734a4c427c4d04"

let mapped = 
    seq { for i in 0..((str.Length / 2) - 1) do yield str.Substring(i * 2, 2) }
    |> Seq.mapi(fun idx s -> (idx, Int32.Parse(s, NumberStyles.HexNumber)))
    |> Seq.toArray

let bytes = seq { 0..255}

// these are some assumptions we make
// if no valid solution is present, we must come back and revise this expression
let valid c = 
    (c >= 'a' && c <= 'z') ||
    (c >= 'A' && c <= 'Z') ||
    (c >= '0' && c <= '9') ||
    (c = ' ' || c = '.' || c = ',' || c = '!')

let makeSet fidx = 
    mapped 
    |> Seq.filter(fun (idx,n) -> idx % 4 = fidx) 
    |> Seq.map(fun (idx,n) -> n)
    |> Seq.toArray

let key p = 
    bytes
    |> Seq.filter(fun k -> (makeSet p) |> Seq.forall(fun n -> valid (char(n ^^^ k))))
    |> Seq.toArray

let Possible0 = key 0
let Possible1 = key 1 |> Array.map(fun k -> k <<< 8)
let Possible2 = key 2 |> Array.map(fun k -> k <<< 16)
let Possible3 = key 3 |> Array.map(fun k -> k <<< 24)
let allPossible = 
    seq {
        for p in Possible0 do
            for p2 in Possible1 do
                for p3 in Possible2 do
                    for p4 in Possible3 do
                        yield p ||| p2 ||| p3 ||| p4
    }

for key in allPossible do
    let mkey = BitConverter.GetBytes(key)
    let temp = mapped |> Array.map(fun (idx,n) -> (byte ((byte n) ^^^ mkey.[idx%4])))
    let clearText = Encoding.ASCII.GetString(temp) // hopefully
    // I noticed this from printing out clear text, wasnt many results (80)
    if (clearText.StartsWith("You ")) then
        printfn "Key: %d\nResult: %s" key clearText

printfn "Completed analysis!"

Narrowed the brute downto 630-candidates. From there, I let it brute and simply watched the results churn till I was able to make out what the first word was. Then I simply applied an if-statement with a break point and voila. We've brute-forced our key in a "smart" way!

Going back and revising our algorithm to only check for valid punctuation, we narrow it down to 80-candidates.

#Infamous

[Ultimation]

lol ok, he wins, i brute forced it, took a while though.


and yes its very messy :P

 Spoiler

string s = "7c42671e4d4c645b0549775d5754624a4049324a4d483253405e615f4248324d504e715b565e744b49416b1f056e7d50425f734a5041734a4c427c4d04";
            byte[] message = StringToByteArray(s);
            string temp = HexString2Ascii(s);
            string s2 = "";
            List<Tuple<byte, byte>> Demonitors = new List<Tuple<byte, byte>>();
            string values1 = "";
            string values2 = "";
            for (int i = 0; i < 0xFFFFFFFF; i++)
            {
                byte[] key = BitConverter.GetBytes((int)i);
                if ((message[0] ^ key[0]) == (byte)'Y' && (message[1] ^ key[1]) == (byte)'o' && (message[2] ^ key[2]) == (byte)'u' && (message[3] ^ key[3]) == (byte)' ')
                {
                    string s3 = DecryptMessageAndConvertToString(temp, i);
                
                }

            }