0RAYS-祥云杯writeup-misc

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Misc

层层取证

用volatility取证,发现其存在几个可疑进程,FTK Imager就是一个磁盘的取证工具,另一个文件夹的镜像文件就是用这个来取证

stikynot进程是一个便利贴程序

同时还有explorer存在,先看一下ie记录

Process: 2384 explorer.exe
Cache type "DEST" at 0x77c6fa3
Last modified: 2020-08-15 19:39:48 UTC+0000
Last accessed: 2020-08-15 11:39:50 UTC+0000
URL: XiaoMing@file:///C:/Users/XiaoMing/Desktop/flag.txt

得到了一个flag.txt的目录
然后用winrar解压Forensic_image.001得到一个Forensic_image,用FTK加载这个镜像

前往目录找到flag.txt

1

提示说需要仿真
然后继续在FTK里搜索一下xiaoming目录下的文件,在appdata/local/temp下找到两个可以的流量包

在上图所指流量包中,找到一个flag.docx

直接追踪UDP流可以得到一个rar文件
提示压缩包密码和开机密码一样
通过hashdump得到

Administrator:500:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
Guest:501:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
XinSai:1000:aad3b435b51404eeaad3b435b51404ee:27caa41e7118fd4429d9b9cbd87aaa40:::
XiaoMing:1001:aad3b435b51404eeaad3b435b51404ee:92efa7f9f2740956d51157f46521f941:::

将xiaoming的密码解密一下得到开机密码为xiaoming_handsome
打开压缩包,发现docx文件还有加密,没有密码了,尝试去仿真,利用FTK可以直接制作镜像,然后用虚拟机打开

发现两张便签叠在了一起

得到了文档密码

flag{9ca871b668f2-b668-097c-cbm8-9op404c891e2}

shuffle_code

得到一个reverse的png图片,反转一下得到二维码

扫一下得到

col426327/1132122/1211132223/3113253/61531113/111312/5323125/2222/11122153/311111/14312121/11231211/2423211/262121/422221/622132/31121/221122111/5122311/2111221221/121692/12122111/232326/11142121/31253151/22111111123/111313121/1111111/2151371row31121113/12321133/13111112/13112221121/12112232/16113232/11311311/21111231/11111211/711111117/2124112211/611111241/1311371/131152131/13/2121111311/521(11)11/1311321131/1211211/11111111/14221262/3411131/161713/422141/7122117/1111112111/7111412/71111121/131112131

根据行列的提示,以及711111117猜测是一个二维码的黑块的数据,搜索一下得到这是数织
找到一个解密的工具,解密

但是有部分无法得出,存在多种可能,所以先随便填一种
然后得到的图片是将二维码的每一行进行了打乱
按照二维码的定位符,可以先将上下大致都还原

然后根据二维码的读取方式猜测前几个字符为flag{,然后一步步还原每一行,得到二维码

鸣雏恋

下载附件得到一个docx文件,修改为zip后缀,得到key.txt和love.zip

key.txt零宽解密得到压缩包密码

解压压缩包得到129488张图片

一共有两种图片,怀疑是0和1的置换

写个脚本读文件MD5,置换成01。

import hashlib
import sys
def getmd5(filename):
    md5hash = hashlib.md5()
    f = open(filename, 'rb')
    b = f.read()
    md5hash.update(b)
    f.close()
    return md5hash.hexdigest()
flag = ""
fp = open('data.txt', 'w')
content = "out\\"
for i in range(0, 129488):
    # print(getmd5(content + str(i) + ".png"))
    if getmd5(content + str(i) + ".png") == "a29b9b5c770a188849b787047c7d994d":
        flag += "0"
    elif getmd5(content + str(i) + ".png") == "34e828cce80ef24b02c48310a697f97c":
        flag += "1"
    else:
        print("error!!!")
        continue
fp.write(''.join([chr(i) for i in [int(flag[b:b+8], 2) for b in range(0, len(flag), 8)]]))
fp.close()

解得

data:image/png;base64,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

base64解密一下,是一个png图片

保存成png图片,图片下方即为flag

ChieftainsSecret

下载附件得到一个docx文件和一张jpg图片,docx文件是题目描述,没什么用。

jpg图片是一个老式拨号机。

JPG图片用winhex打开发现FFD9文件尾不在文件的最后,后面隐藏了一个rar文件

提取出rar文件,里面有一个csv文件和一张jpg图片

谷歌搜索下TLE5501芯片,可知会输出一个角度,正好原图上这种老式拨号机,是通过转动转盘旋转读取数字的。

csv内有PC0-3四个数字,根据芯片图可知正好对应SIN_P,SIN_N,COS_P,COS_N。

已知sin cos可以计算tan或arctan,知道tan或arctan即可求得角度,直接利用excel表格计算

求sin坐标

求cos坐标

知道了sin和cos,就可以求arctan了。

在excel里发现用这个最为方便

这里写的是G2=TAN(E2,F2), H2=ATAN(F2,E2)*180/PI()

之后做一个表

这个就是拨号的角度变化图,初始状态为-180度,即图中这个地方

之后约每360/15=24度为一个数字,老式拨号机就是转动到一个数字后,再切回起点。故图中是此起彼伏的山脉形状。

之后根据约24度为一个数字,最高点就是转动到需要的电话号码数字然后开始拨回起点。

得到flag:

77085962457

考古

下载附件是一个是一个winXP的内存文件

首先pstree一下看看有什么进程,可以看到cmd进程

然后cmdscan一下,发现一些信息

根据提示可以得出是跟C盘里的Oneclickcleanup.exe有关

filescan一下

然后dumpfiles出来,得到一个exe文件

用IDA打开exe文件,F5一下

得到一个加密脚本

data_start的值为:

数据很多,就不全部放出来了。

key为

然后可以写一个逆脚本反推一下

key = 'this_a_key'
flag = ''
data = 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for i in range(0, len(data), 2):
    flag += str(hex(int(data[i:i+2], 16) ^ ord(key[i//2%10])))[2:].zfill(2)
print(flag)

得到:

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转一下十六进制

导出后是一个doc文件

用winhex打开看一下,发现在word上显示的信息后面还有一串东西

XOR爆破一下,发现flag,但是不对,很是疑惑嗷。

查看十六进制,在后面又看到了类似于疑惑爆破后为flag的字符串

疑惑爆破一下得到最终flag

此时正好就是对字符’-‘进行异或

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