1.題目,hint:LSB,BGR,NTFS
2.解壓後得:
3.由提示得:LSB,BGR (使用工具stegSolve),保存爲.png
4.查看文件(Winhex)
5.format提取
6.winhex修改圖片高度
7.掃描,StegSolve反轉一下顏色
8.網頁掃描(https://www.bejson.com/convert/qrcode/)
9.下載文件
10.winrar解壓後得到flag.txt,並沒有多大作用
hint NTFS ,將文件導出來
11.解壓導出.pyc文件(https://tool.lu/pyc/)
12.根據解密函數寫出解密函數
def decode():
ciphertext = [
'96',
'65',
'93',
'123',
'91',
'97',
'22',
'93',
'70',
'102',
'94',
'132',
'46',
'112',
'64',
'97',
'88',
'80',
'82',
'137',
'90',
'109',
'99',
'112']
ciphertext.reverse()
flag = ''
for i in range(len(ciphertext)):
if i % 2 == 0:
s = int(ciphertext[i]) - 10
else:
s = int(ciphertext[i]) + 10
s = chr(i ^ s)
flag += s
return flag
def main():
flag = decode()
print(flag)
if __name__ == '__main__':
main()
運行完後,得到flag