SECCON2017国内決勝大会 Write-up ref: https://qiita.com/onokatio/items/95ba13f7d4facd09be6c

file0.txt

$ curl -Ss http://umeda.koth.seccon/login|tr '<>' '\n\n' > a ; rg "csrf_name" a|sed -E 's/.*(name=)(.*)(value)/\1/'|sed -E 's/name=="//'|sed -E 's/"//' > csrf_name ; rg "csrf_value" a|sed -E 's/.*(name=)(.*)(value)/\1/'|sed -E 's/name=="//'|sed -E 's/"//' > csrf_value ; curl -Ss -X POST -d "csrf_name=$(cat csrf_name)&csrf_value=$(cat csrf_value)&name=test&password=test" http://umeda.koth.seccon/register -i

file1.txt

(async() => {
    const content = document.getElementsByClassName('uk-input uk-text-large')[0];
    const button = document.getElementsByClassName('uk-button uk-button-default')[0];
    content.value = "64ccf53cf25dc8b8ef7ff4e6eb060f86";
    button.click();
})();