Defcon 19 Packet Challenge - Level 6

The last ingredient is stored away in Dr. Creedence Clearwater's private Truecrypt volume. On his hard drive there was a file titled "cipher". Perhaps it contains a clue that you can use to unlock the volume and help Inter0ptic find out the last ingredient.

1)      What is the final ingredient?

This one took a short while to figure out what the cipher.txt was telling us. 

chester@bluestem:~/DRILL$ cat cipher.txt

1-2  5-1 3-8 4-1 1-3 2-3 1-1 3-5 5-5 4-7

It not-so-quickly dawned on me that the first number in each pair was 1-5, and we had 5 previous answers.  So, the second number must be which character from the previous passwords to use. 

After working that out, the answer was found to be: 00gmu1rt#?

Using that key to open the Truecrypt volume, you find a file named “133t pill” with the following message:

Dear Inter0ptic,

If you are reading this message, then you must have escaped. Congrats. You didn't think that I was going to let you have the ingredients to the 133t pill, did you? As you have probably guessed, I obtained the creditcard numbers and the ingredients of the 133t pill myself, and sold them for a very nice profit.

Just in case you are curious, the missing ingredient for the 133t pill was "2oz Vodka."

It was great workin with you, my pawn.

XOXO,

Ann

And so the final answer is “20z Vodka”