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#Confira o ip "..." e "1.1.1.1"

Login Mundo linux

- melhorando o acesso, para diminuir o stress.
sshpass -p "schoolofrock" ssh [email protected] -p 2003  -o "passwordAuthentication=yes"

recursos auxiliares

- Escrevendo uma função para base64 Decode em julia lang:
using  Base64

decode = (encoded::String)-> base64decode(encoded) |> String

listando arquivos ocultos no home

ls -la

leitura dos arquivos ocultos com "CAT"

cat .file.txt

cat .bash_history

Descifrando ".file.txt"

Deduções

  • A flag é constituida por "FIAP"seguida de "{" então procurar codificações base64 que contenham o inicio "RklBUH" que equivale a palavra "FIAP" indica uma possivel flag.

    • BASE64 = FIAP == RklBUH
  • o acesso via SSH é sem vpn, logo o ip é publico 1.1.1.1

Scan de serviços com NMAP

nmap 1.1.1.1

Cod. utils

module utils    
    using  Base64
    using CodecBase
    export decode  
      
    decode =(encoded::String)->base64decode(encoded) |> String
    decode_base32=(encoded::String)->transcode(Base32Decoder(),encoded) |> String
end 

Script de listagem do padrão FIAP em Base64

try
    cmd_search_base64_fiap = Cmd(`sshpass -p "schoolofrock" 
                                  ssh [email protected] -p 2003
                                      -o "passwordAuthentication=yes" grep -r "RklBUH" /`)
    out_txt = "./dados/grep_RklBUH.txt"
    err_txt = "./dados/grep_RklBUH.txt"
    run(pipeline(cmd_search_base64_fiap,stdout=out_txt,stderr=err_txt))    
catch e
    println("Erro ao executar o comando: $e")
end

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