alarm_clock

题目附件

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https://pan.baidu.com/s/1ntjpwzC_VelRSaZTFfknYQ?pwd=mkes 提取码: mkes

解题过程

解压缩包后得到一个vmdk文件，使用R-Studio磁盘恢复工具打开发现存在压缩包和音频文件将音频文件和压缩包恢复到本地，发现压缩包解压需要密码，猜测密码存在于音频文件里打开音频文件，根据听到的声音猜测是SSTV编码使用Audacity工具将音频左右声道分离拼接拼接后：使用kali安装qsstv解sstv

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sudo apt-get install qsstv -y

使用得到的密码解压压缩包，查看data.txt 推测为数字序列，编写脚本将其转换为笔画路径并绘制图形

python

# Sample sequences (first three lines)
input_text = """3,3,3,3,9,9,6,6,6,0,0,0,0,1,1,5,5
6,6,6,6,4,3,2
1,2,3,4,5,6,6,6,6,6,6,3,9,9,9,10,11,0,1,2,3,3
3,3,6,6,6,6,7,9,11,5,3,1,0,0,9,9,0,0
8,7,6,8,4,6,5,4
6,3,3,9,9,6,3,3,6,6,9,9
3,3,6,6,6,6,9,9,0,0,0,0,6,6,3,3
3,3,6,6,6,6
3,3,6,6,6,6,0,0,9,9,0,0
3,3,6,6,6,6,9,9,0,0,0,0
7,1,6,6,6,6,9,3,3
3,3,9,9,6,6,6,6,3,3,0,0,9,9
10,9,8,7,6,5,4,3,2
3,3
3,3,6,6,9,9,3,3,6,6,9,9
3,3,6,6,6,6,9,9,0,0,0,0
7,1,6,6,6,6,9,3,3
6,6,6,6,6,0,0,1,2,3,4,5,6,7,8,9,10,11,0
3,3
7,7,7,3,3,3,9,0,0,0,6,6,6,6,6
3,3,6,6,6,6,9,9,0,0,0,0,6,6,3,3
7,7,7,3,3,3,9,0,0,0,6,6,6,6,6
3,3,6,6,6,6,9,9,0,0,0,0
3,3
3,3,6,6,6,6,0,0,9,9,0,0
6,3,3,9,9,6,3,3,6,6,9,9
6,6,6,6,6,0,0,1,2,3,4,5,6,7,8,9,10,11,0
3,3,3,3,9,9,6,6,6,0,0,0,0,1,1,5,5
3,3
6,6,6,6,6,0,0,1,2,3,4,5,6,7,8,9,10,11,0
3,3,3,3,11,10,9,8,7,6,5,4,3,2,1
3,3,6,6,6,6
3,3,6,6,9,9,6,6,3,3
6,6,6,6,6,0,0,1,2,3,4,5,6,7,8,9,10,11,0
3,3,6,6,9,9,3,3,6,6,9,9
3,3,6,6,6,6
3,3,6,6,6,6,0,0,9,9,0,0
6,6,6,6,6,0,0,1,2,3,4,5,6,7,8,9,10,11,0
3,3,6,6,9,9,6,6,3,3
7,1,6,6,6,6,9,3,3
3,3,3,3,11,10,9,8,7,6,5,4,3,2,1
4,5,6,4,8,6,7,8"""

import matplotlib.pyplot as plt
import numpy as np


lines = [list(map(int, line.split(','))) for line in input_text.strip().split('\n')]

# Plot strokes using relative moves
for i, seq in enumerate(lines):
    x, y = 0, 0
    xs, ys = [x], [y]
    for k in seq:
        theta = np.pi/2 - k * (2 * np.pi / 12)  # 0 at top, increasing clockwise
        x += np.cos(theta)
        y += np.sin(theta)
        xs.append(x)
        ys.append(y)
    plt.figure()
    plt.plot(xs, ys, '-o')
    plt.axis('equal')
    plt.title(f"Relative Stroke Sequence {i+1}")
    plt.savefig('123\\'+str(i)+'.png', bbox_inches='tight')

得出flag为：

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flag{5879016c-301b-4840-95bf-be72b379b21e}