| buuctf reverse [UTCTF2020]babymips | 您所在的位置：网站首页 › jeb逆向mips › buuctf reverse [UTCTF2020]babymips |
buuctf reverse [UTCTF2020]babymips
|
buuctf reverse [UTCTF2020]babymips
转载
mb5ff9812a47cf3 2021-08-07 23:54:00 文章标签 指令集 IT 文章分类 代码人生 die 查看发现是mips的指令集，无壳，直接拖进ida
初看逻辑应该比较简单，跟进函数。
这个函数里面是程序的主要逻辑，可以看到一个异或的操作，之前在上面可以找到一串密文。 猜测逻辑是，将flag的每一个字符与23加一开始进行异或。 str = [0x62,0x6C,0x7F,0x76,0x7A,0x7B,0x66,0x73,0x76,0x50,0x52,0x7D,0x40,0x54,0x55,0x79,0x40,0x49,0x47,0x4D,0x74,0x19,0x7B,0x6A,0x42,0x0A,0x4F,0x52,0x7D,0x69,0x4F,0x53,0x0C,0x64,0x10,0x0F,0x1E,0x4A,0x67,0x03,0x7C,0x67,0x02,0x6A,0x31,0x67,0x61,0x37,0x7A,0x62,0x2C,0x2C,0x0F,0x6E,0x17,0x00,0x16,0x0F,0x16,0x0A,0x6D,0x62,0x73,0x25,0x39,0x76,0x2E,0x1C,0x63,0x78,0x2B,0x74,0x32,0x16,0x20,0x22,0x44,0x19] flag = '' for i in range(len(str)): flag+=chr(str[i] ^ (23+i)) print(flag)utflag{mips_cpp_gang_5VDm:~`N]ze;\)5%vZ=C'C(r#$q=*efD"ZNY_GX>6&sn.wF8$v*mvA@'} os：这flag看着跟假的一样 赞 收藏 评论 分享 举报上一篇：常见加密算法特征表 下一篇：buuctf reverse [GUET-CTF2019]encrypt |
![buuctf reverse [UTCTF2020]babymips_IT](https://s2.51cto.com/images/blog/202108/08/1906935754783427b844300a83afeae8.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_30,g_se,x_10,y_10,shadow_20,type_ZmFuZ3poZW5naGVpdGk=/resize,m_fixed,w_1184)
![buuctf reverse [UTCTF2020]babymips_指令集_02](https://s2.51cto.com/images/blog/202108/08/40849740f9ed8b22d688a964304c9ec0.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_30,g_se,x_10,y_10,shadow_20,type_ZmFuZ3poZW5naGVpdGk=/resize,m_fixed,w_1184)
【本文地址】
公司简介
联系我们