WHAT IS THIS? | Defend the Web

-.- [BooCracker1]
11 years ago

0

NmY2NjcyMmU3NDZkNmY3NzY2NzQ3NTY1MmU2ZjYxMmU2Nzc3

@….@

daMage
11 years ago

0

Finally!
I thought that I was the only one who has noticed it… But I know now that it’s up to you to find out what it is.
I’ll give you a hint: it is an invitation of some kind

daMage

Keeper
11 years ago

0

It resolves to a hash (I guess) but the length is invalid for any hashing algorithm. Is it a mistake in the encoding process or is it just me that can’t get it?

daMage
11 years ago

0

No, isn’t a hash afaik

daMage

Keeper
11 years ago

0

Any statistics on how many people have had it decoded?

daMage
11 years ago

0

Hm, I wish I knew… flabby?

daMage

Keeper
11 years ago

0

So @daMage did you decode it yourself? I’m just curious cuz it seems to be pretty odd

Peter [verath]
11 years ago

0

Ohh, okay. The hash is not a hash… :)

print(", ".join([str(x) for x in range(1,100) if not [y for y in range(2, x) if x%y==0]]))

J [ColdIV]
11 years ago

0

<div class="center hash"> NmY2NjcyMmU3NDZkNmY3NzY2NzQ3NTY1MmU2ZjYxMmU2Nzc3 </div>

Looks like a hash to me, saw it before but did not know what to do with it because of it’s length..

Peter [verath]
11 years ago

0

Without trying to spoil anything;
* The two most common hashing algorithms on the web are usually expressed as base 16.
* Look at the string and what characters are in it:
NmY2NjcyMmU3NDZkNmY3NzY2NzQ3NTY1MmU2ZjYxMmU2Nzc3
Contains numbers, 10.
Contains letters of the English alphabet, 26.
Seems to differentiate between upper and lower case, 26.
Possibly more characters not in the string, 0-?

print(", ".join([str(x) for x in range(1,100) if not [y for y in range(2, x) if x%y==0]]))

Keeper
11 years ago

0

I think I got to the very end but I wouldn’t like to post anything because it might spoil the “challenge”. 100% it’s not a hash because no hashing algorithms implies it valid.

-.- [BooCracker1]
11 years ago | edited 11 years ago

0

To say the truth it was the first time I saw home and then I saw that by the way i still dont get it :D

@….@

daMage
11 years ago

0

@keeper
yea, I did it by myself… If you are wondering if you are at the “end” of this, from what I found out was that there were 3 steps from the original to the plaintext, and the first 2 of those are one-liners in python ;)

It’s not a hash, unless you can “decrypt” it in more than 1 ways.

daMage

Keeper
11 years ago

0

I finally got it decoded but now I am figuring out what the purpose of it was.

^UknownSource^ [mattempik]
11 years ago

0

me too . i also have the code :) just dont know what it means yet :)

when the time has come , I shall rise and conquer the world

Fireshard
11 years ago

0

I’m not really sure, but…does it have anything to do with some capture the flag thing? And if so…what?
Can someone who’s solved it please PM me with an answer whether i am right or wrong, please?
Thanks!

Don’t post answers on the forums!

Search other forums before making new threads called “help” !

Click me for an interesting post on the forum!

BLACK OPS [Noob13]
11 years ago

0

come on , why all that Mystery !?

Theres no place like 127.0.0.1

daMage
11 years ago

0

countdown has 3 digits anymore.. I guess we’ll find out soon enough…

daMage

BLACK OPS [Noob13]
11 years ago

0

I`m Trying to Split it to 3 or 2
some have mean and some not
can you tell me what you do ?

Theres no place like 127.0.0.1

daMage
11 years ago

0

Have you reached the countdown or not?

daMage

BLACK OPS [Noob13]
11 years ago

0

Sorry I got nothing !

Theres no place like 127.0.0.1

Fireshard
11 years ago

0

Ok…if you reach 3 digits that MAY count down when you refresh (it counts down pretty slow so you may not see it), then you’re there.
Don’t over-complicate the way you think it! The way daMage put it, it’s 2 lines of code, and a little bit of thinking if you solve it by means of programming (and I solved it “manually” in about 20 minutes)

Don’t post answers on the forums!

Search other forums before making new threads called “help” !

Click me for an interesting post on the forum!

^UknownSource^ [mattempik]
11 years ago

0

still not understand . looks like i should more about cryptography :)

when the time has come , I shall rise and conquer the world

daMage
11 years ago

0

or atleast the most common ways to encode things..

daMage

J [ColdIV]
11 years ago

0

Well I just did it with online tools, takes like 10 seconds if you know what to do.

Looks interesting, looking forward for it ;)

Keeper
11 years ago

0

It would be hilarious nothing to happen. The countdown finishes and you get pruned (rofl)

Reply has been removed

Keeper
11 years ago

0

@AnOnymCrazy_ you know this is not a french forum. Keep to the rules.

Fireshard
11 years ago

0

Just 165 to go? That’s weird, it was just under 900 when i left home 3 days ago…oh well :)

Don’t post answers on the forums!

Search other forums before making new threads called “help” !

Click me for an interesting post on the forum!

^UknownSource^ [mattempik]
11 years ago

0

163 more hahaha

when the time has come , I shall rise and conquer the world

-.- [BooCracker1]
11 years ago

0

WHAT IS THIS FOR??

@….@

Fireshard
11 years ago

0

I do suppose we shall see when it reaches 0? Maybe it’s the Final Countdown, who knows? :) I just hope I won’t be sleeping when it happens to reach 0

Don’t post answers on the forums!

Search other forums before making new threads called “help” !

Click me for an interesting post on the forum!

^UknownSource^ [mattempik]
11 years ago

0

me too now is 156 :) really2 cant wait hahah

when the time has come , I shall rise and conquer the world

-.- [BooCracker1]
11 years ago

0

i hope to when THE THING happens please tell me :p

@….@

^UknownSource^ [mattempik]
11 years ago

0

49 now that the number :)

when the time has come , I shall rise and conquer the world

daMage
11 years ago | edited 11 years ago

0

Already 100k? but the event didn’t start? /cry

daMage

Fireshard
11 years ago

0

Well…is it ok if we share the answer to this one now?

Don’t post answers on the forums!

Search other forums before making new threads called “help” !

Click me for an interesting post on the forum!

Luke [flabbyrabbit]
11 years ago

0

Of course … explain away

Fireshard
11 years ago | edited 11 years ago

0

So, you start off with this:
NmY2NjcyMmU3NDZkNmY3NzY2NzQ3NTY1MmU2ZjYxMmU2Nzc3
You can notice one of two things:
1)It’s a Base64 code…and decode it using some base64-to-ascii program
2)The hash has uppercase, lowercase and numbers, no spaces or other characters. Google up codings that have this property and find out the Base64.

Decoding NmY2NjcyMmU3NDZkNmY3NzY2NzQ3NTY1MmU2ZjYxMmU2Nzc3 with Base64 gives:
6f66722e746d6f77667475652e6f612e6777
Here, you need to notice that there’s only lowercase up to f and digits…so hex numbers. Take it and decode it using some hex-to-ascii program

Decoding 6f66722e746d6f77667475652e6f612e6777 with hex-to-ascii gives:
ofr.tmowftue.oa.gw
This is most obviously a link, which has some substitution cipher used on it. Noticing the “dot, 2 letters, dot, 2 letters” at the end, you can safely assume the ending is “.co.uk”. After that, you will realize it can become **.hackthis.co.uk and after replacing you get: ct.hackthis.co.uk. Then you can just backtrack the last letter to F:

ctf.hackthis.co.uk is the solution to the puzzle.

Don’t post answers on the forums!

Search other forums before making new threads called “help” !

Click me for an interesting post on the forum!

???Roun512 [roun512]
11 years ago

0

yes its important event to the HACKTHIS! community :)

If you make people think they’re thinking, they’ll love you. but if you really make them think, they’ll hate you.
~ Harlan Ellison

-.- [BooCracker1]
11 years ago

0

and what is going to happen ?? more levels or something?

@….@

???Roun512 [roun512]
11 years ago

0

if u read the description it says new levels will come by time

If you make people think they’re thinking, they’ll love you. but if you really make them think, they’ll hate you.
~ Harlan Ellison

^UknownSource^ [mattempik]
11 years ago

0

cant wait for the competition :)

when the time has come , I shall rise and conquer the world

daMage
11 years ago

0

Just 1 more thing:
In base64 there can be the following characters:
- uppercase letters A-Z (26 characters)
- lowercase letters a-z (26 characters)
- numbers 0-9 (10 characters)
- special characters + and / (2 characters)
- for padding =

26 + 26 + 10 + 2 = 64, thus base64 :)

daMage

^UknownSource^ [mattempik]
11 years ago

0

just realize when you post that @daMage :) thanks

when the time has come , I shall rise and conquer the world

-.- [BooCracker1]
11 years ago

0

U people know so much

@….@

EEEEE
11 years ago

0

wow i hadn’t even notice it

EEEEE EEEEE EEEEE EEEEE EEEEE EEE
E E E E E EEE
EEE EEE EEE EEE EEE EE
E E E E E
EEEEE EEEEE EEEEE EEEEE EEEEE @

Abhijeet [abhi1302]
11 years ago

0

need to gear up with all sorts of cryptography :)

There are 10 types of people in the world: Those who understand binary, and those who don’t

BLACK OPS [Noob13]
11 years ago

0

Fireshard you are Genius

Theres no place like 127.0.0.1

oxide
11 years ago

0

i cant believe i missed this it was so easy damnit

i bake therefore im fried!!

Wibben
11 years ago

0

I hate the fact that I didn’t register before ctf… hopefully another event is coming out soon

**CLOSE** the thread after you're done!!! Crypt 7, the hardest and baddest so far. ![Image](https://www.hackthis.co.uk/user/hacking is about Knowledge and intuition/userbar.png)