myria's place

docx 파일 복구!

자세한건 귀찮으니 생략;

뭐 대충 hxd로 열어서 헤더파일 만들어 넣고

어짜피 여기서 해서 뭐 얼마나 더 괜찮게 되겠으...

zip파일로 열어서 document.xml로 걍 찾아봄 ㅇㅇ.. 결과는 굿.. 있었음

actf{too_bad_for_zip_recovery}

IMAGE TRICKERY
문제

이미지가 하얀색으로만 덮여있는것처럼 보이지만 픽셀값을 살펴보면 아님 ㅇㅇ...
귀찮아서... 툴도 없고 해서 그냥 일단 그림판으로 대충 칠함

그러니까 QR코드가 나옴

https://webqr.com/index.html
여기서 QR코드 올려서 어떤거 나오는지 봄

=> 결과
http://pastebin.com/S9De6WYA
라는 값이 나옴.. QR코드 해석한 결과임

안에 들어가봄

base64값으로 보이는 RAW값이 있음
base64 디코딩해봄

RAW => 디코딩
data:image/svg+xml;base64, (base64값)
뭔가 또 나옴...

또 디코딩해보니까 svg+xml이 나옴 ㅇㅇ

xml로 저장해서 열어서 보면
왠 북극봄이 꼬깔콘같은 그거 뒤집어쓰고 PARTY HARD하면서
actf{fa1L_F15H} 라고 그림판으로 글씨쓴거처럼 되있음

... 망할 힌트있는줄 몰랐는데 방금 알음;;

Tap code 라 불리는 암호임...

참조 : https://en.wikipedia.org/wiki/Tap_code

GoldWave나 등등의 툴로 열어보든 아니면 직접 들어보든해서 들어보면

한번당 Knock 소리를 기록할수 있음

2 3 1 5 3 1 3 5 3 2 1 5 3 5 3 1 1 5 1 1 4 3 1 5 임...

이걸 2개씩 묶음 그리고 옆 표대로 하면 됨

(2, 3) h

(1, 5) e

(3, 1) l

(3, 5) p

(3, 2) m

(1, 5) e

(3, 5) p

(3, 1) l

(1, 5) e

(1, 1) a

(4, 3) s

(1, 5) e

flag : helpmeplease

The horse was a small falcon runner.

The horse was a huge goat pitcher.

The pig is a quick falcon singer.

The goat was a quick sheep speaker.

The sheep is the big goat pitcher.

The sheep was a slow sheep hitter.

The horse is a tiny goat dancer.

A cow is the huge bluejay dancer.

The falcon is the fast sheep pitcher.

The pig was a speedy falcon pitcher.

The pig was the speedy goat singer.

The goat was a huge sheep hitter.

The horse was the speedy sheep runner.

The cow was a speedy bluejay singer.

A sheep is a small falcon catcher.

The cow was the fast cow singer.

The goat was a sluggish sheep catcher.

The goat is the slow robin catcher.

단어가 반복되고 같은 종류의 말들이 사용되는 것으로 보아 아마 같은 단어(종류)들은 같은 정보(비트)를 가질것이다.

또 한 문장이 7개의 단어들로 나누어져있음을 알 수 있다.

분류 시작

----------------------

The : 1 

A : 0

----------------------

네발 동물(육지) : 1

horse, pig, goat, sheep, cow

----------------------

두발 동물(공중) : 0

falcon, bluejay, robin

----------------------

is : 1

was : 0

----------------------

크기 : 0

big, huge, small, tiny

----------------------

속도 : 1

speedy, fast. slow, sluggish

----------------------

야구 : 1

runner, catcher, pitcher, hitter

----------------------

노래 : 0

singer, dancer, speaker

----------------------

The horse was a small falcon runner.

 1      1     0   0   0      0       1

....

....

....

1100001 a

1100011 c

1110100 t

1100110 f

1111011 {

1100111 g

1110010 r

0111000 8

1011111 _

1100101 e

1101110 n

1100011 c

1101111 o

1100100 d

0110001 1

1101110 n

1100111 g

1111101 }

actf{gr8_encod1ng}

와.. 힌트없는줄 알았는데 힌트가 잇엇음... 뭐 도움은 안됐지만;; 이미 풀고난뒤 ㅂㄷ

hint : The letters seem to be the only thing that was encrypted...how unfortunate.

 some ciphertext.

vfauedwyedmtlwylwnawyjfdzltqilqdezfntmwyewyejzettjedmwyfjlzettjyeilwfplxaenmlmpvbldzqwyxadjzyfjxfddemfqwvfavfatwzlqdplnxqyeilexnlewlnnljsfdjqpqtqwvwyedvfauedsfjjqptvoewyfbvfazllsofnjedwqexfedmvfauanjlwylbenqdljvfayeilwyewtaranvvfayeilwyltaranvfodfwcdfzqdxzyewqcdfzwyewjedwqexfjmlewyzyqtlwnexqusnfpeptvjeilmtqiljedmbvlrqjwldulzyqtlxnfwljgaledmqdufbsnlyldjqptlwfvfajeiljtqiljvfamfdwzedwwylwnawyplueajlmllsmfzdqdsteuljvfamfdwwetcepfawewsenwqljvfazedwblfdwyewzettvfadllmblfdwyewzettzlajlzfnmjtqclyfdfnufmltfvetwvzlajlwyljlzfnmjejwylpeucpfdlwfetqoljsldwmloldmqdxjfblwyqdxvfaajllbejesaduytqdlqyeildlqwylnwylwqbldfnwylqdutqdewqfdwflrsteqdbvjltowfebedzyfnqjljedmjtllsjadmlnwylptedclwfowylilnvonllmfbqsnfiqmlwyldgaljwqfdjwylbeddlnqdzyquyqsnfiqmlqwqmnewylnvfahajwjeqmwyedcvfaedmzldwfdvfanzevfwylnzqjlqjaxxljwvfasqucasezlesfdedmjwedmesfjwlqwylnzevqmfdwxqilemebdzyewvfawyqdcvfanlldwqwtlmwf{olzxffmbldhljjls}

오...

간단히 일단 설명...

http://www.cryptoclub.org/tools/ciphers.php

위 사이트 substitution cipher에서 빈도수 조사해서

l=e 일 확률이 높아서 http://quipqiup.com/ 여기서 그렇게 하고 ㄱㄱ 햇음

http://www.cryptoclub.org/tools/ciphers.php

you cant handle the truths on we live in a world that has walls and those walls have to be guarded by men with guns whos gonna do it you yoult weinberg i have a greater responsibility than you can possibly fathom you weep for santiago and you curse the marines you have that luxury you have the luxury of not knowing what i know that santiagos death while tragic probably saved lives and my existence while grotesque and incomprehensible to you saves lives you dont want the truth because deep down in places you dont talk about at parties you want me on that wall you need me on that wall we use words like honor code loyalty we use these words as the backbone to a life spent defending something you use em as a punch line i have neither the time nor the inclination to explain myself to a man who rises and sleeps under the blanket of the very freedom i provide then questions the manner in which i provide it id rather you just said thank you and went on your way otherwise i suggest you pick up a weapon and stand a post either way i dont give a damn what you think youre entitled to{ few good men jesse p}

시저, 치환, 여러 암호 툴

http://www.cryptoclub.org/

여타 신기한거 많이 찾아줌

http://quipqiup.com/

rls1004 블로그

http://rls1004.tistory.com/

https://rls1004.github.io/

Arch 블로그

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HACKERZ ON THE SHIP

https://bpsecblog.wordpress.com/