CTF签到题

发布于:2025-05-23 ⋅ 阅读:(25) ⋅ 点赞:(0)

 1.题目:VmxkMFUxVXhTbkpOU0dSVVZrWktWRlpyVm5kU2JGSnlWbXhhYkdKRlduaFpWVlpoVkcxRmQwMUlhRlpXTTFKUVZXdFZlR05zWkZsaVJrcG9ZbGRvUmxaR1dsZFVhekZIVW14V1lWSlZOVkJVVlZaV1RVWldjbFZzVGxOTlJGWlhWa1pvZDFWdFJuTlRhMVpXVm14YVIxUlVSa2RPYkVweVYyeENWMVpVUlhwV1ZtUjNVMjFXVjFOclZsZGhNbEpQV1ZSR1IwNVdVbGRTVjNoT1RVWkdjMVJVUWxKS1ZFNUY=

2.答案:糟糕糟糕偶买噶魔法怎么失灵啦-_-!

3.write up:

第一步,base64解码,解出:Vld0U1UxSnJNSGRUVkZKVFZrVndSbFJyVmxabGJFWnhZVVZhVG1Fd01IaFZWM1JQVWtVeGNsZFliRkpoYldoRlZGWldUazFHUmxWYVJVNVBUVVZWTUZWclVsTlNNRFZXVkZod1VtRnNTa1ZWVmxaR1RURkdObEpyV2xCV1ZURXpWVmR3U21WV1NrVldhMlJPWVRGR05WUldSV3hOTUZGc1RUQlJKVE5F

第二步,base64编码,解出VWtSU1JrMHdTVFJTVkVwRlRrVlZlbEZxYUVaTmEwMHhVV3RPUkUxcldYbFJhbWhFVFZWTk1GRlVaRU5PTUVVMFVrUlNSMDVWVFhwUmFsSkVVVlZGTTFGNlJrWlBWVTEzVVdwSmVWSkVWa2ROYTFGNVRWRWxNMFFsTTBRJTNE

第三步,base64编码,解出:

UkRSRk0wSTRSVEpFTkVVelFqaEZNa00xUWtORE1rWXlRamhETVVNMFFUZENOMEU0UkRSR05VTXpRalJEUVVFM1F6RkZPVU13UWpJeVJEVkdNa1F5TVElM0QlM0Q%3D

第四步,出现%,url编码,解出:UkRSRk0wSTRSVEpFTkVVelFqaEZNa00xUWtORE1rWXlRamhETVVNMFFUZENOMEU0UkRSR05VTXpRalJEUVVFM1F6RkZPVU13UWpJeVJEVkdNa1F5TVElM0QlM0Q=

第五步,base64编码,解出:

RDRFM0I4RTJENEUzQjhFMkM1QkNDMkYyQjhDMUM0QTdCN0E4RDRGNUMzQjRDQUE3QzFFOUMwQjIyRDVGMkQyMQ%3D%3D

第六步,出现%,url编码,解出:RDRFM0I4RTJENEUzQjhFMkM1QkNDMkYyQjhDMUM0QTdCN0E4RDRGNUMzQjRDQUE3QzFFOUMwQjIyRDVGMkQyMQ==

第七步,base64编码,解出:

D4E3B8E2D4E3B8E2C5BCC2F2B8C1C4A7B7A8D4F5C3B4CAA7C1E9C0B22D5F2D21

第八步,第七步答案为16进制数,GB2312可以解码出有意义的字符:

糟糕糟糕偶买噶魔法怎么失灵啦-_-!