Internetwache CTF 2016 Crypto-Pirat

Question :

Word of Caution : Highly frustrating challenge due to multiple encryption,encoding etc,. :-p

Attachment : crypto50.zip

Solution :
Attachment has a README.txt which has :

♆♀♇♀♆ ♇♇♀♆⊕ ♇♀♇♀♆ ♇♆♇♆⊕ ♆♇♆♇♇ ♀♆♇♆⊕ ♆♇♆♇♆ ♇♆♇♆⊕ ♆♇♇♀♇ ♀♆⊕♇♀ ♆⊕♇♀♆ ⊕♆♇♆♇ ♇♀♆♇♆ ⊕♇♀♇♀ ♆⊕♆♇♆ ♇♆♇♇♀ ♆⊕♆♇♆ ♇♆♇♆⊕ ♆♇♆♇♆ ♇♆⊕♇♀ ♆♇♇♀♆ ♇♆⊕♇♀ ♆♇♆♇♇ ♀♆⊕♆♇ ♆♇♇♀♇ ♀♇♀♆⊕ ♆♇♆♇♇ ♀♆⊕♇♀ ♇♀♆♇♆ ⊕♆♇♇♀ ♆⊕♇♀♆ ♇♇♀♇♀ ♆⊕♆♇♆ ♇♆♇♆♇ ♆⊕♇♀♆ ♇♇♀♆♇ ♆⊕♇♀♆ ♇♆♇♇♀ ♆⊕♆♇♆ ♇♇♀♇♀ ♇♀♆⊕♇ ♀♆♇♆♇ ♆⊕♇♀♇ ♀♇♀♆⊕ ♇♀♇♀♆ ♇♆♇♆⊕ ♆♇♆♇♆ ♇♆⊕♆♇ ♇♀♇♀♆ ⊕♆♇♆♇ ♆♇♆♇♇ ♀♆⊕♇♀ ♇♀♆♇♆ ♇♆⊕♆♇ ♆♇♆♇♇ ♀♇♀♆⊕ ♆♇♆♇♆ ♇♆⊕♆♇ ♇♀♆♇♆ ♇♆⊕♆♇ ♆♇♆♇♆ ♇♆♇♆⊕ ♆♇♇♀♇ ♀♆⊕♇♀ ♇♀♆♇♆ ⊕♆♇♆⊕ ♆♇♆♇♇ ♀♇♀♇♀ ♆⊕♇♀♆ ♇♇♀♆♇ ♆⊕♇♀♇ ♀♆♇♆♇ ♆♇♆⊕♇ ♀♆♇♆⊕ ♇♀♇♀♆ ♇♆♇♆⊕ ♆♇♆♇♆ ♇♆⊕♇♀ ♆♇♆♇♇ ♀♆⊕♆♇ ♆⊕♇♀♇ ♀♇♀♆⊕ ♆♇♇♀♆ ♇♆⊕♆♇ ♇♀♇♀♇ ♀♆⊕♆♇ ♇♀♇♀♆ ♇♆⊕♆♇ ♆♇♇♀♆ ⊕♇♀♆♇ ♆♇♆♇♇ ♀♆⊕♇♀ ♆♇♆♇♆ ♇♇♀♆⊕ ♇♀♆♇♆ ♇♆♇♇♀ ♆⊕♇♀♆ ♇♆♇♆♇ ♇♀♆⊕♇ ♀♆♇♆♇ ♆♇♇♀♆ ⊕♇♀♆♇ ♆♇♆♇♇ ♀

Nuit de Hack Quals - 2014 Carbonara

This was easy and i actually over thought it..
Question :

the ciphertext was : "%96 7=28 7@C E9:D 492= :D iQx>A6C2E@C xF=:FD r26D2C s:GFDQ]"

My first approach:
substitution by looking at asciitable.com

":" - "i"
"D" - "s"

after which with the help of this (which i just guessed as it was a 2 letter string and my guess was it would be "is")
decoding which i got
THE FLAG FOR THIS CHAL IS "iMPERATOR jULIUS cAESAR dIVUS"
i was stuck with the letter x actually..Later my friend told that it was a rot-47 :-D all my work in vain..i got the string as :
The flag for this chal is :"Imperator Iulius Caesar Divus".

Flag : Imperator Iulius Caesar Divus 

Backdoor CTF 2014 Crypto-10

Just cracked this in seconds..Have a very good experience with these kind of stego's.

Question :
H4x0R recently went missing. An investigating team specializing in hacking was deployed to search around his place. All they found was this file. Please help them obtain secret 32characters string that can lead to him

Submit the flag as: flag_obtained
Image given :

So the below image says ther is a image inside this image.How to extract? just rename the jpg to rar and extract it you would see a image.

Olympic-CTF 2014 figure Crypting-10 { Crypting}

Was soo much interesting because after you solve this,you will laugh at it..Well most of them could not solve this in the CTF.

Question :
43wdxz 4edcvgt5 65rdcvb 6tfcgh8uhb 9ijn

I feel this should be answered with just images.because you have to look at the beauty of the question.
well if you hover your finger according to the letter or numbers above you will get letters.Didn't understand?

Nullcon HackIm 2014 Crypto-1

This was amazingly awesome.need really some brain.Well i got hints and solved it too.Getting hints is not bad but trading for flags is bad. :-) just a advice.

Question : dna nihilistic humanoids lost nihilistic weak cloned nihilistic dna dna nihilistic humanoids lost dna into tools dna soulless zombies dna into lost breed xenophobes lost zombies dna soulless nihilistic cloned

So what do u understand from this?? basically nothing :-D so when u dont understand things u should google around.So from a blog writer u can notice that similar words were used to built a sentence which had all alphabets in a order and in the beginning.Thats the HINT.. :-D

So take out all the first letters from the sentence and u would get a string like ..
dnhlnwcn....

Now after this was a break point.hard to guess the cipher.It was substitution cipher.Now using the technique of most occuring letters u can deduce that ,'d' was most occurred alphabet so it should either be matching to 'e' or 't' coz those are the most frequently occurred letters in english.you can work out this by googling out for a nice tutorial to solve monoalphabetic substitution cipher.

d->t n->o h->b l->e w->r c->n......

substituting , you would get a string and thats the flag

Flag : tobeornottobethatisthequestion

CSCamp CTF - Crypto 1a

Ah this took me a lot of time to figure out eventhough it was only 30 points.Points doesn't matter.Does it?Uh only if you are good enough.In learning stage never look for points.

well enough of philosophy :-p Now lets get back to work.

Question was to decrypt the message
Message was : Zc duwcievvohpxqv uf bue xw iuzmgwtpthshon. Xpby wg tzx bak eikdxqht; wh'y sse rui ru tx bagh agexmky. Hvk qpiz og hnp pwpkfqgdi mfs rsk qmdx nogn zj bak yse tr thcsfilwm.

Now i guessed it as vigenere cipher and confirmed with admins about it.They told to proceed as i was in correct path.

Now how do i find the key..just keep trying from 1..At 8 you get it.I mean you can see the plain text ..
Key is "GOOGLEIT".

try here : http://www.cryptool-online.org/index.php?option=com_cto&view=tool&Itemid=99&lang=en

You see this ?
"TO PolYaLphabetic oR NoT to PolYalphabeTic. ThIs iS not THe QUeStiOn; iT's hoW YoU do it THaT MaTteRs. the flag iS The loWeRcaSe eMm dee fiVe haSh of THe keY in lOWeRcase."

now the message clearly says : md5(googleit)
MD5 hash for googleit is : 36a2b79e4c40eabc3824b2bb433978f4

Flag :  36a2b79e4c40eabc3824b2bb433978f4

CSCamp Crypto-PNG

Again i don't remember the exact question.
There is an encrypted image can you tell me what is the message?

Download the file here : https://www.dropbox.com/s/njg7i9q5fworlxq/enc.png?m=

When googled about it there was a similar question in some CTF and i found that xor cipher.So asked one of the admin and confirmed it.Now which tool do we use? Xortool from hellman.Astonishingly he himself was there in the irc :-p
Download it here : https://github.com/hellman/xortool

Go to the xortool and type this in command line "python ./xortool.py -c 00"
First time i used the tool and was totally impressed.

Key is : x0Rk3y
well i havent made the python xortool.py a executable.If you are using linux you can just run this command "chmod +x xortool.py" and after this you can just use xortool.
Now lets go ahead note that i haven't made my xortool.py a executable.
Lets run this command now enc.png python ./xortool.py/00_x0Rk3y
After this you would see a folder named "xortool_out" and in that a file named "0.out"
Rename it to .png and open it in paint or whichever image viewer you want.

you will see "The key is pwnthexorcrypto"

Flag : pwnthexorcrypto