御网杯

misc

misc1

考察知识点:word隐写

wps打开，ctrl+A全选，调换颜色即可

image-20240922181239546

flag{HNCTF9090AS9nbg87600hn77hn88}

misc2

考察知识点

编码1：BrainFuck解码

image-20240922202913546

编码2：JSFuck编码

image-20240922203024347

编码3：ook解密

在线网址：[Brainfuck/Ook! Obfuscation/Encoding splitbrain.org]

image-20240922203218375

misc3

分组字节流搜索flag,我们可以发现在长度为337，349，85的包里搜索到flag

image-20240922225311013

image-20240922225334650

提取其16进制，保存为压缩包，打开我们可以发现flag.txt和key

flag:

10004583275926070044326083910251708233320797779355779208703097816305188140191914132269450797

4e94dcdb6de87e65d263419ec45aec93e8a2e1d386b31fb804e0f02366df44dbe86a8a7c462d

key

5216294695211820293806247029887026154798297270637676463374801674229881314620340407569315152

28f8bdbc16de4850e05579acf33c8aa08ac3d9e6e3822b8c3081c04700eb25b88a08eb457550

转16进制进行XOR异或

image-20240926194610800

flag{66526827ff3ba85e1444a0df4acbba93}

misc4

936544a55314a7e4339545f47776a6e41315a7d41325743575655455b4478516a6537416

很明显的一段unicode解码，随波逐流解码得

image-20240922203522270

936544a55314a7e4339545f47776a6e41315a7d41325743575655455b4478516a6537416

逆序得：6147356a6158744b55455657534752314d7a51314e6a67774f5459334e7a41355a445639

16机制转ascii可得

image-20240922203708424

aG5jaXtKUEVWSGR1MzQ1NjgwOTY3NzA5ZDV9

base64解密

image-20240922203747729

hnci{JPEVHdu345680967709d5}

可以观察到hnci与flag之间h向后退了2格，根据f->h,l->n,a->c,g->i

我们可以得出flag

flag{HNCTFbs345680967709b5}