2023楚慧杯

Easy_zip

解压附件名字为4096.zip

猜测总共有4096个压缩包

import zipfile
import os

def decompress_zip(archive_file):
    with zipfile.ZipFile(archive_file, 'r') as zip_ref:
        zip_ref.extractall(path="tmp/")
        os.remove(archive_file)
        os.system("mv tmp/* .")
        os.rmdir("tmp")


if __name__ == "__main__":
    for i in range(4096,0,-1):
        filename = f"{i}.zip"
        decompress_zip(filename)
        print(f"[+] {filename} 解压成功 =======>")

文本内容

+-+++-++ +-+++++- +-+-++-- +-++++-- +-+-+-++ +-+++--+ +----+-- ++--+++- ++--++++ +--+++-- ++--+-+- ++---+++ ++--++-+ ++--+-+- ++---+++ +--+++-- +--+++-- +--++--+ ++--+++- +--++-+- ++--+--- +--+++-- ++--+--+ ++--++-- ++--+++- +--++-+- ++--+-+- ++---++- ++--+++- ++--+++- +--++-+- +--++-++ ++--+--+ +--++++- +--+++-- +--+++-- ++--+-++ +--++-+- +--++-++ +-----+-

替换

DASCTF{10c58258ccf1e7c631e5911ed6acc4ed}

easy取证


找到密钥:H7Qmw_X+WB6BXDXa

filescan扫出来一个文档

dump下来

snow隐写

DASCTF{f891eff370a2cbefec49d2a577b552d3}