[MRCTF2020]Hello_misc

语雀链接
After decompression found two files
flag.rar with password

try to restore it.png 使用zsteg查看发现 extradata:0有zip数据

提取zip数据zsteg try\ to\ restore\ it.png -E "extradata:0" > 1.zip

Open to find thiszipThe file also has a password,try to restore it.png There is another picture in this picture

Extract the output zsteg try\ to\ restore\ it.png -E "b1,r,lsb,xy" > out.png ,得到zip的密码

Unzip the first one extractedzip文件, 得到一个txt文件.

Convert these values ​​to binary,Extract the first two digits,得到rar的解压密码 rar-passwd:0ac1fe6b77be5dbe

data = open("out.txt",'r').readlines()
res = ""
for i in data:
    bin_data = bin(int(i.replace("\n",'')))[2::]
    if len(bin_data) != 8:
        bin_data = "0"*(8-len(bin_data)) + bin_data
    else:
        pass
    res +=(bin_data[0:2])
    for j in range(0,len(res),8):
    print(chr(int(res[j:j+8],2)),end='')

解压flag.rar文件得到一个fffflag.zip,发现是docx文件,用pdf打开,修改字体颜色

base64Multi-line decryption,替换1is obtained for spacesflag ： flag{He1Lo_mi5c~}

data = """MTEwMTEwMTExMTExMTEwMDExMTEwMTExMTExMTExMTExMTExMTExMTExMTExMTExMTAxMTEwMDAwMDAxMTExMTExMTExMDAxMTAx MTEwMTEwMTEwMDAxMTAxMDExMTEwMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTAxMTExMTExMTExMTExMTEwMTEwMDEx MTEwMDAwMTAxMTEwMTExMDExMTEwMTExMTExMTAwMDExMTExMTExMTExMDAxMDAxMTAxMTEwMDAwMDExMTExMDAwMDExMTExMTEx MTEwMTEwMTAwMDAxMTExMDExMTEwMTExMTExMDExMTAxMTExMTExMTEwMTEwMTEwMTAxMTExMTExMTAwMTEwMTExMTExMTExMTEx MTEwMTEwMTAxMTExMTExMDExMTEwMTExMTAxMDExMTAxMTExMTExMTEwMTEwMTEwMTAxMTAxMTExMTAwMTEwMTExMTExMTExMTEx MTEwMTEwMTAwMDAxMTAwMDAwMTEwMDAwMDAxMTAwMDExMTAwMDAwMTEwMTEwMTEwMTAxMTEwMDAwMDAxMTExMDAwMDExMTExMTEx""".split('\n')
import base64
for i in data:
    bindata = str(base64.b64decode(i)).replace('1',' ')
    print(bindata)