Houseplant CTF 2020 [Beginners] category writeup

年始に参加してとても楽しかった RiceTeaCatPanda CTF の派生、Houseplant CTF というのがあったみたいで、archiveが公開されていたのでやってみました。
ぶっちゃけ SECCON CTF 2020 の crypto分野復習中なんですけど、考えるのが面倒脳みそパンパンになってきたので易しめのCTFやってﾋｬｯﾎｳしたかったというのが本音です…。

https://riceteacatpanda.wtf/houseplant-challenges/riceteacatpanda.wtf

まずはBeginneres分野。1時間くらいでダダっとできる。picoCTF（今はpicoGym）の50~100点問題くらいの難易度で、本当のBeginners向けという感じ。私みたいなただの謎解き好きから入門するにはオススメな感じだった。

f:id:kusuwada:20201107052612p:plain

Beginner 1 25 Points

When Bob and Jia were thrown into the world of cybersecurity, they didn't know anything- and thus were very overwhelmed. They're trying to make sure it doesn't happen to you. Let's cover some bases first.

cnRjcHt5b3VyZV92ZXJ5X3dlbGNvbWV9

問題文からbase64っぽいのでbase64 Decodeするとflagが出た。

$ echo "cnRjcHt5b3VyZV92ZXJ5X3dlbGNvbWV9" | base64 -D
rtcp{youre_very_welcome}

Beginner 2 25 Points

Bob wanted to let you guys know that "You might not be a complete failure." Thanks, Bob.

72 74 63 70 7b 62 6f 62 5f 79 6f 75 5f 73 75 63 6b 5f 61 74 5f 62 65 69 6e 67 5f 65 6e 63 6f 75 72 61 67 69 6e 67 7d

Hint!

Still covering bases here.

CyberChefに問題の数値を突っ込むと候補で勝手に変換してくれる。

CyberChef

これはhexのasciiだった。よくflagに使われる{}のasciiのhex表記を覚えておくと捗る。

{: 0x75
}: 0x7f

Beginner 3 25 Points

Fun fact: Jia didn't actually know what this was when they first started out. If you got this, you're already doing better than them ;-;

162 164 143 160 173 163 165 145 137 155 145 137 151 137 144 151 144 156 164 137 153 156 157 167 137 167 150 141 164 137 157 143 164 141 154 137 167 141 163 137 157 153 141 171 77 41 175

Hint!

wow, these bases are getting smaller

8進っぽい。これもCyberChefで一発だ。

CyberChef

Beginner 4 25 Points

Caesar was stabbed 23 times by 60 perpetrators... sounds like a modern group project

egpc{lnyy_orggre_cnegvpvcngr}

Caesarなので、何文字がずらしてあるはず。記号は対象外っぽい。
flagのformatがrtcp{****}なので、

e -> r
g -> t
p -> c
c -> p

である。アルファベットがすべて +13、rot暗号になってそう。

import string

cipher = "egpc{lnyy_orggre_cnegvpvcngr}"
shift = 13
flag = ''

for c in cipher:
    if c.isalpha():
        flag += string.ascii_lowercase[(string.ascii_lowercase.index(c) + shift)%26]
    else:
        flag += c

print(flag)

実行結果

$ python rot.py 
rtcp{yall_better_participate}

Beginner 5 25 Points

beep boop

-- .- -. -.-- ..--.- -... . . .--. ... ..--.- .- -. -.. ..--.- -... --- --- .--. ...

Remember to wrap the flag in the flag format rtcp{something}

お！モールス信号だ！モールス信号買得用のスクリプト作ったんだよね！

github.com

$ python morse.py 
input mode (d: decode, e: encode) > d
input your message > -- .- -. -.-- ..--.- -... . . .--. ... ..--.- .- -. -.. ..--.- -... --- --- .--. ...
MANY_BEEPS_AND_BOOPS

Yeah!🙌

Beginner 6 25 Points

i'm so tired...

26 26 26 26 26 26 26 26 19 12 5 5 16 9 14 7 9 14 16 8 25 19 9 3 19

*disclaimer: DON'T DO THIS KIDS. only sleep in math.

Remember to wrap the whole thing in the flag format rtcp{}

Hint!

this isn't a hint; this is just us expressing our regret for taking 8AM physics

これもCyberChefに入れたら候補を出してくれた。

CyberChef

alphabetのindexになっていた。1~26なのでそこで気づけるかな？

Beginner 7 25 Points

Don't go around bashing people.

igxk{fmovhh_gsvb_ziv_nvzm}

これもflag formatがrtcp{なことを考慮して、対応を見つければ良さそう。

i -> r  +9
g -> t  +13
x -> c  +5
k -> p  +5

うーん、単純なshiftではなさそう。[9,13,5,5] がkeyだとしてずらしてみるとどうなるかな。

import string

cipher = "igxk{fmovhh_gsvb_ziv_nvzm}"
al = string.ascii_lowercase
key = [9, 13, 5, 5]
flag = ''
count = 0

for c in cipher:
    if c.isalpha():
        flag += al[(al.index(c) + key[count%len(key)])%26]
        count += 1
    else:
        flag += c

print(flag)

実行結果

$ python beginners7.py 
rtcp{oztaqu_lxeo_ene_aaev}

うーん、違いそう。key長を1~3くらい伸ばしてみてもそれっぽくならない。短いけど超guessingするやつか？

gsvb_zivは、換字暗号だとするとTsvb_zRv。（変換後が大文字）。 THEY_AREとかにならないかな？

s -> h
v -> e
b -> y
z -> a

仮に置き換えてみると fmoEhh_THEY_ARE_nEAm。Eが多くなるのも傾向的にあってそう。
次に気になるのは最遺書の単語の語尾。同じ文字が2つ続いてるので、可能性の有りそうなものを突っ込んでみてcrosswordsolverでふさわしそうな単語がないか確認する。

***ETT, ***ESS あたりがありそう。unless があやしい。入れてみると

f -> u
m -> n
o -> l
h -> s

RTCP{UNLESS_THEY_ARE_nEAN}

となった。あとは意味が通りそうなものをnに突っ込んでみたらflagが通ったのが正解、って感じかな？多分

rtcp{unless_they_are_mean}がflag。

他の方のwriteupを見たところ、Atbash cipher というものらしい。

Atbash Cipher

ここに突っ込んでみると一発だった。

解説はこちら Atbash - Wikipedia
なんと！Alphabet逆順と思えばよかったのか。最初の考察に文字のindexも降ればわかったかもしれない。

i [ 9] -> r [18]  +9
g [ 7] -> t [20]  +13
x [24] -> c [3]   +5
k [11] -> p [16]  +5

こう見ると、index同士を足したら27になっていたことがわかる。

Beginner 8 25 Points

You either mildly enjoy bacon, think it's a food of the gods, or are vegan/vegetarian.

00110 01110 00100 00000 10011 00101 01110 01110 00011 00011 01110 01101 10011 10010 10011 00000 10001 10101 00100

Remember to wrap the flag in rtcp{}

Hint!

Make sure you use the "complete" alphabet.

これもただの2進数なのでCyberChef案件。

CyberChef

変換結果にAlphabet Completeとある。ヒントと同じだ。

ちなみに、数列を2進数 -> 10進に変換して、alphabetのindexにするとsolverがかける。

import string

cipher = "00110 01110 00100 00000 10011 00101 01110 01110 00011 00011 01110 01101 10011 10010 10011 00000 10001 10101 00100"
flag = ''

for c in cipher.split():
    flag += string.ascii_lowercase[int(c,2)]

print(flag)

実行結果

$ python bin.py 
goeatfooddontstarve

Beginner 9 50 Points

Hope you've been paying attention! :D

Remember to wrap the flag with rtcp{}

Hint!

we stan cyberchef in this household

配布される Beginner 10.txt

MmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMGEgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmQgMmQgMmQgMmQgMmQgMjAgMmUgMmQgMmQgMmQgMmQ=

最後に=があるのが気になったので、base64 decodeしてみるとこんな結果に。

2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 0a 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2e 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2d 2d 2d 2d 2d 20 2e 2d 2d 2d 2d

おっ、これはまだ何か変換できそうだ。
面倒なので、進められたとおりCyberChefで変換すると

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morse?

00110010 00110110 00100000 00110101 00100000 00110010 00110110 00100000 00111001 00100000 00110010 00110101 00100000 00110010 00110010 00100000 00110010 00110110 00100000 00110010 00110101 00100000 00110010 00110110 00100000 00111001

binary?