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Mossad 2018 challenge

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Re: Mossad 2018 challenge

#51

Post by seagull »

anvandare wrote: post #31
artie_effim wrote: post #5

Isn't that brainf*ck?

Yes. The highlighted areas are: >+-++ -+--> [+--+] + +++ --.-------- -.+++.[++>--- + +.-[----->++ -. +[->+++ +.+++++ ++++++.---------- --.----[->+++ + .-[-->+++++ --- .------.[--->+ ++.[-]>+-++ -+-- > [ +--+] + + -++ -+--> [+--+] => xor-with-key +++++++++++[>++++ +++++++ +[ - ]-[>+ -- -[ -][ -]>++> +[>++[- ] [ -]>+>++[++ >++[- ] [ -]>+>+[>++++[ - ] [ - ]++++++++[>++++++ +++++ +[ -]+ ++>>+>+[->+++[- ] [ -]+ +++++++[>+…

I think this is actually one byte off, I get 7A 46 5C 53 55 59 03 5A 41 03 06 01 (not output, but ends up in memory).

Re: Mossad 2018 challenge

#52

Post by anvandare »

jerry40 wrote: post #45
anvandare wrote: post #31

Earlier quoted context omitted.

Yes. The highlighted areas are: >+-++ -+--> [+--+] + +++ --.-------- -.+++.[++>--- + +.-[----->++ -. +[->+++ +.+++++ ++++++.---------- --.----[->+++ + .-[-->+++++ --- .------.[--->+ ++.[-]>+-++ -+-- > [ +--+] + + -++ -+--> [+--+] => xor-with-key +++++++++++[>++++ +++++++ +[ - ]-[>+ -- -[ -][ -]>++> +[>++[- ] [ -]>+>++[++ >++[- ] [ -]>+>+[>++++[ - ] [ - ]++++++++[>++++++ +++++ +[ -]+ ++>>+>+[->+++[- ] [ -]+ +++++++[>+…

z.\SUY.ZA... and Israel-is-70 (text from the picture) have the same length. Coincidence?

No coincidences with games like this. :) (I went over it again, and of course a simple blob isn't just a binary, it has no magic bytes or anything, stupid.) Using "Israel-is-70" gives me ... 3?.205.32.11 Which of course looks like an IP-address, but incomplete (the ? is C0). Probably made a mistake with the decoding of the key-part of the brainfuck. Still, only 10 numbers to pick from: 3[0-9].205.32.11

Edit: thanks to Seagull for pointing it out already, the key was off by one byte. So that gives 35.205.32.11

Re: Mossad 2018 challenge

#54

Post by fotcorn »

bernarpa wrote: post #46

Spoiler: ... as it was said, the first brainfuck program prints xor-with-key. The second program doesn't output anything but it sets the memory "array" with 12 non-zero values. By XORing these values with the phrase present in the image (12 characters too) you get "35.205.32.11" which can be an IP (something in Google's ranges), geographical coordinates (interpreted as x,y they point somewhere in Israel, in fact) or…

The IP is only accessible from inside Isreal, use a proxy from there and the IP works.

Re: Mossad 2018 challenge

#55

Post by bernarpa »

anvandare wrote: post #52
jerry40 wrote: post #45

Earlier quoted context omitted.

z.\SUY.ZA... and Israel-is-70 (text from the picture) have the same length. Coincidence?

No coincidences with games like this. :) (I went over it again, and of course a simple blob isn't just a binary, it has no magic bytes or anything, stupid.) Using "Israel-is-70" gives me ... 3?.205.32.11 Which of course looks like an IP-address, but incomplete (the ? is C0). Probably made a mistake with the decoding of the key-part of the brainfuck. Still, only 10 numbers to pick from: 3[0-9].205.32.11 Edit: thanks t…

Are you sure? By doing the XOR I get 35.205.32.11...

Re: Mossad 2018 challenge

#56

Post by jerry40 »

anvandare wrote: post #52
jerry40 wrote: post #45

Earlier quoted context omitted.

z.\SUY.ZA... and Israel-is-70 (text from the picture) have the same length. Coincidence?

No coincidences with games like this. :) (I went over it again, and of course a simple blob isn't just a binary, it has no magic bytes or anything, stupid.) Using "Israel-is-70" gives me ... 3?.205.32.11 Which of course looks like an IP-address, but incomplete (the ? is C0). Probably made a mistake with the decoding of the key-part of the brainfuck. Still, only 10 numbers to pick from: 3[0-9].205.32.11 Edit: thanks t…

Ok, so actually the puzzle has been cracked. Nothing else we can do. This end was definitely not happy.

Re: Mossad 2018 challenge

#57

Post by bhouston »

harel wrote: post #53

Fellas, please, keep the politics out of it. You got Facebook for that... :)

You are incorrect, we are allowed to discuss politics on hacker news and have opinions on politics, especially when it intersects technology. It is done all the time here on hacker news.

Re: Mossad 2018 challenge

#58

Post by cfrs »

bernarpa wrote: post #46

Spoiler: ... as it was said, the first brainfuck program prints xor-with-key. The second program doesn't output anything but it sets the memory "array" with 12 non-zero values. By XORing these values with the phrase present in the image (12 characters too) you get "35.205.32.11" which can be an IP (something in Google's ranges), geographical coordinates (interpreted as x,y they point somewhere in Israel, in fact) or…

This link leads to page with the first challenge: "Your help is needed once again to solve an urgent matter. Our digital forensics division is trying to track the source of a phishing attack on one of our government officials..."

Re: Mossad 2018 challenge

#59

Post by harel »

bhouston wrote: post #57
harel wrote: post #53

Fellas, please, keep the politics out of it. You got Facebook for that... :)

You are incorrect, we are allowed to discuss politics on hacker news and have opinions on politics, especially when it intersects technology. It is done all the time here on hacker news.

From the guidelines:

    Off-Topic: Most stories about politics, or crime, or sports, unless they're evidence of some interesting new phenomenon.
This story was posted as one of technical interest. The political side effects are not of technical interest.

Re: Mossad 2018 challenge

#60

Post by bernarpa »

jerry40 wrote: post #56
anvandare wrote: post #52

Earlier quoted context omitted.

No coincidences with games like this. :) (I went over it again, and of course a simple blob isn't just a binary, it has no magic bytes or anything, stupid.) Using "Israel-is-70" gives me ... 3?.205.32.11 Which of course looks like an IP-address, but incomplete (the ? is C0). Probably made a mistake with the decoding of the key-part of the brainfuck. Still, only 10 numbers to pick from: 3[0-9].205.32.11 Edit: thanks t…

Ok, so actually the puzzle has been cracked. Nothing else we can do. This end was definitely not happy.

You're wrong... Go through an Israeli proxy to that IP (or via TOR by configuring exit nodes), it's only the beginning. ;-)
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