103.[GKCTF 2021]签到

 

追踪流发现类似flag 字符 f14g

下面有大量的是16进制字符

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

 

转换成字符

在线16进制字符串转换工具 - 在线工具网

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

base64解码 

https://base64.us/
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==QIhM0QDN0Q

但是每一行都倒转了

https://www.qqxiuzi.cn/zh/daoxu/

进行每行倒换

 
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再次解码base64 去掉双写

flag{Welc0me_GkC4F_m1siCCCCCC!}

104.[UTCTF2020]zero

 

 

下载文件 ，显示上面，NTFS 隐写尝试，没有

根据题目0 应该是0宽隐写

Unicode Steganography with Zero-Width Characters

得到flag

utflag{whyNOT@sc11_4927aajbqk14}

105.[WUSTCTF2020]spaceclub

 

打开什么也没有，但是是有东西的

 

放入到word 中

 

长度很有规律 ，很像二进制  0,1  

所以

011101110110001101110100011001100011001000110000001100100011000001111011011010000011001101110010011001010101111100110001011100110101111101111001001100000111010101110010010111110110011001101100010000000110011101011111011100110011000101111000010111110111001100110001011110000101111101110011001100010111100001111101

 字符串二进制转换

得到flag wctf2020{h3re_1s_y0ur_fl@g_s1x_s1x_s1x}