BaseCTF-reYouaregoodatIDA直接按F5得到一地段flagY0u_4Re_第二段提示F12双击打开按x900d_47_最后一段提示在Interesting函数之中id4BaseCTF{Y0u_4Re_900d_47_id4}UPXmini先脱壳拖入IDA，base64解码就好BasePlusF5找到key0xEbase64换表＋异或BaseCTF{BA5e_DEcoD1N6_sEcr3t}UPX脱