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Crypto CTFs Tricks
- Google it
Most of encoded data can be decoded with these 2 ressources:
- Base32 [A-Z2-7=]
NBXWYYLDMFZGCY3PNRQQ====
- Base58 [123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]
2yJiRg5BF9gmsU6AC
- Base62 [0-9A-Za-z]
g2AextRZpBKRBzQ9
- Base64 [A-Za-z0-9+/=]
aG9sYWNhcmFjb2xh
- Base85 --> Like Ascii85
- ATOM-128 [/128GhIoPQROSTeUbADfgHijKLM+n0pFWXY456xyzB7=39VaqrstJklmNuZvwcdEC]
MIc3KiXa+Ihz+lrXMIc3KbCC
- HAZZ15 [HNO4klm6ij9n+J2hyf0gzA8uvwDEq3X1Q7ZKeFrWcVTts/MRGYbdxSo=ILaUpPBC5]
DmPsv8J7qrlKEoY7
- MEGAN35 [3GHIJKLMNOPQRSTUb=cdefghijklmnopWXYZ/12+406789VaqrstuvwxyzABCDEF5]
kLD8iwKsigSalLJ5
- ZONG22 [ZKj9n+yf0wDVX1s/5YbdxSo=ILaUpPBCHg8uvNO4klm6iJGhQ7eFrWczAMEq3RTt2]
ayRiIo1gpO+uUc7g
- ESAB46 []
3sHcL2NR8WrT7mhR
- MEGAN45 []
kLD8igSXm2KZlwrX
- TIGO3FX []
7AP9mIzdmltYmIP9mWXX
- TRIPO5 []
UE9vSbnBW6psVzxB
- FERON74 []
PbGkNudxCzaKBm0x
- GILA7 []
D+nkv8C1qIKMErY1
- Citrix CTX1 []
MNGIKCAHMOGLKPAKMMGJKNAINPHKLOBLNNHILCBHNOHLLPBK
â•«â˜â†‘Λ↻Λâ”Λ↻â˜â†‘Λ
.... --- .-.. -.-. .- .-. .- -.-. --- .-.. .-
begin 644 webutils_pl
M2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(
M3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/
F3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$$`
`
end
begin 644 webutils_pl
hG2xAEIVDH236Hol-G2xAEIVDH236Hol-G2xAEIVDH236Hol-G2xAEIVDH236
5Hol-G2xAEE++
end
=ybegin line=128 size=28 name=webutils_pl
ryvkryvkryvkryvkryvkryvkryvk
=yend size=28 crc32=35834c86
(This file must be converted with BinHex 4.0)
:#hGPBR9dD@acAh"X!$mr2cmr2cmr!!!!!!!8!!!!!-ka5%p-38K26%&)6da"5%p
-38K26%'d9J!!:
<~85DoF85DoF85DoF85DoF85DoF85DoF~>
drnajapajrna
Letters to their numerical value
8 15 12 1 3 1 18 1 3 15 12 1
Letter to num
(ax+b)%26 (a and b are the keys and x is the letter) and the result back to letterkrodfdudfrod
Multitap replaces a letter by repeated digits defined by the corresponding key code on a mobile phone keypad (This mode is used when writing SMS).
For example: 2=A, 22=B, 222=C, 3=D...
You can identify this code because you will see several numbers repeated.
Substitude each letter for 4 As or Bs (or 1s and 0s)
00111 01101 01010 00000 00010 00000 10000 00000 00010 01101 01010 00000
AABBB ABBAB ABABA AAAAA AAABA AAAAA BAAAA AAAAA AAABA ABBAB ABABA AAAAA
Raw Deflate and Raw Inflate (you can find both in Cyberchef) can compress and decompress data without headers.
A keywork is needed
fgaargaamnlunesuneoa
A keywork is needed
wodsyoidrods
2 base64 strings (token and key)
Token:
gAAAAABWC9P7-9RsxTz_dwxh9-O2VUB7Ih8UCQL1_Zk4suxnkCvb26Ie4i8HSUJ4caHZuiNtjLl3qfmCv_fS3_VpjL7HxCz7_Q==
​
Key:
-s6eI5hyNh8liH7Gq0urPC-vzPgNnxauKvRO4g03oYI=
A secret is splitted in X parts and to recover it you need Y parts (Y <=X).
8019f8fa5879aa3e07858d08308dc1a8b45
80223035713295bddf0b0bd1b10a5340b89
803bc8cf294b3f83d88e86d9818792e80cd