6.ctfshow2025新年渗透赛

1. 彩蛋

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2. 启程(比赛群:1014981710)

2.1. 压缩包密码

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爆破出得到
654321

2.2. 图片解密

start.jpg 末尾有base64
Pasted image 20241231205953.png
解密得到python脚本
Pasted image 20241231204845.png

if __name__ == '__main__':
    try:
        import secretMessageResponse
    except ImportError:
        import pip
        pip.main(['install', 'secretMessageResponse'])
        from secretMessageResponse import printMessage

然后下载这个库可以获取到一个加密脚本 printMessage.py,我们需要获取私钥得到明文

import base64,datetime

  
  

message = {

    "inputMessage_20241216" :'''gHgAsclUVPhWDv4S8Oa8SuRTDaj+V0dI4z2jrQwfvfSFWilWwMKwNULUI48UBLS2shZcm/yv2/e5Hq5VRDfXkdxCYQMdvdnvONtpm2yNiIaLpDV4Rs8fOXJ6kcaeT+mg4RkIIFgx35w4J1KgO72pSP8j1p+R9f9TNMafwJ91XmO4QTcOYkMKQMddKvhbyMXzJkSS0uZqEppNSIUnVX9b7m8PmMjV0uHShvb1Zc8UQWJWUJ3cOxwNasOeMQGxJrZXPkxIxDYzm3f0tXbCgvdgNZ8TQY7u+iCXjOtD6xnUsdSahnPq14BD30CilIfsG0r/klPHfxQ+psmHSX47Ylai0TtgfbHWJJ4lSo0ojMvTx6HYK8zmAoCmg4OGXDbv/IjJgYU1w24na0iXZCNtcjB9MLRNck00c20f/uS64Ss0Ixii8nmfsFOjQBCcIYN+HGmOnj5Uw8DVJrxlOmcfQciG3rzuIvYlbOdGMcyarTy2Ba7iZfoovYZObPscAwhNLWqbU4tuR78aOVxiXTFRY7+Y0x2eRT5sulcvB3vsKuDMlNrxaUgiFUohPBZGNsgQgyCPxxqk0NpUn0bbHLH+vBebjJxaim4AU28ctWW8xv7xpxVttb0EoohtK2cIHr79ep5XrU/rv4R58obD/o+QqI1Mrb4wwpX9tsL7ZbROw/MXJwM=''',

    "inputMessage_20240411" : '''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''',

    "inputMessage_20240305" : '''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''',

  

}

  
  
  

def printMessage():

    for key, value in message.items():

        title = key.replace('inputMessage_', '')

        print("\033[1;31m" + "请使用组织分配的私钥解密后使用" + "\033[0m")

        title = datetime.datetime.strptime(title, '%Y%m%d').strftime('%Y-%m-%d')

        print("----------------------------------------------------------")

        print(title)

        print(value)

        print("----------------------------------------------------------")

        print("\n")

  
  

# 最新流通公钥

def getPublicKey():

    return b'''

    -----BEGIN PUBLIC KEY-----

MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAmziayo9Tddo1FYdrtOsw

yjLYJ5frYKEwm4rQTsKU8UcdnnDRgms+ZmStoqlH/qi6x+D1K3fvvioCnGZLFHZw

BUqbgT5x+qUmUaVMll9FOT7ZJ05w8n8Ljqa1akzFMU5G7YbCr3vQwN63vwvD9/63

TDbXkJrv1fGl2rHpPwp5OPCUeCB3nIFIRCWHpJU7sHJqIP5vzV8KNJtbxgR+dhsz

dg+NhoBDUpxoVN5lzSKr2TMOLFLZaQR9AWOV/aHV8gjTkTLDZfc+XlfhxiDMTQdi

UTbk/tynpt+JFrDA8vL5/TOmuxgumqgXZIPGrIUbwloTYyHD/XXmvXu5KE8g3eMK

gxNxuEKM5bMTESBK9A7Q2Kj3eNp0Rvb5Aleg7h8/YbQemGelY/o5xpUyHgHjsfNQ

3j/xhdhVCNVaXZF64V/YVpvC9Cq29F7qI+bl6FlN7zSpuHB3QgNS1uXOmjBCsA7y

pZoWmdXeaLIO+I3kP48BBSmue4nidJifiK/kSOcZ0iegRXV1hyZ6pYdDE7hM5V5t

5tvayJ31zRQNT2ALAFeCDozVWELHTnphkPkQO+SOPglrVz0S1dXicqRofXWMj7PJ

OFkBpWIX0aywMIh1woEAawUs3RM2pfLUNtqUTfodSCmWlwcpGrBWG5NACx7csPFt

zWn8oPZfzL346at5DDIwD2kCAwEAAQ==

-----END PUBLIC KEY-----

'''

  

def enctryptMessage(message):

    import base64

    message_bytes = message.encode('utf-8')  

    message_base64 = base64.b64encode(message_bytes).decode('utf-8')

    publicKey = getPublicKey()

    from cryptography.hazmat.backends import default_backend

    from cryptography.hazmat.primitives import serialization

    from cryptography.hazmat.primitives.asymmetric import padding

    from cryptography.hazmat.primitives import hashes

    public_key = serialization.load_pem_public_key(publicKey, backend=default_backend())

    encrypted = public_key.encrypt(

        message_base64.encode('utf-8'),

        padding.OAEP(

            mgf=padding.MGF1(algorithm=hashes.SHA256()),

            algorithm=hashes.SHA256(),

            label=None

        )

    )

    encrypted_base64 = base64.b64encode(encrypted).decode('utf-8')

    return encrypted_base64

  
  

printMessage()

这里给了我们三段密文,群里提示是npq

Note

Park:
你的行动已经暴露,24小时内迅速撤离,销毁所有资料,将现有资料统一上传到【任务中心】
发送人:Dylan
Park:
总部已经为你安排新的身份,请务必在3日内抵台,你的新身份是新竹县动物保护防疫所网络安全顾问,【任务中心】账号密码和你任职单位网站的数据库用户名密码一致,请尽快修改
发送人:Dylan
Park:
【任务中心】网址已变更为 https://task.ctfer.com ,请注意修改浏览器地址栏中的链接

WPSCAN 可以获取到一个LFI

┌──(root㉿kali)-[~/Desktop/ctf]
└─# curl https://apc.hsinchu.gov.tw/?aam-media=wp-config.php
<?php
/**
 * The base configurations of the WordPress.
 *
 * This file has the following configurations: MySQL settings, Table Prefix,
 * Secret Keys, WordPress Language, and ABSPATH. You can find more information
 * by visiting {@link http://codex.wordpress.org/Editing_wp-config.php Editing
 * wp-config.php} Codex page. You can get the MySQL settings from your web host.
 *
 * This file is used by the wp-config.php creation script during the
 * installation. You don't have to use the web site, you can just copy this file
 * to "wp-config.php" and fill in the values.
 *
 * @package WordPress
 */

// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define( 'DB_NAME', 'hsinchug_wp1' );

/** MySQL database username */
define( 'DB_USER', 'hsinchug_wp1' );

/** MySQL database password */
define( 'DB_PASSWORD', 'Q.4Vyj8VCiedX1KYU5g05' );

/** MySQL hostname */
define( 'DB_HOST', 'localhost' );

/** Database Charset to use in creating database tables. */
define('DB_CHARSET', 'utf8mb4');

/** The Database Collate type. Don't change this if in doubt. */
define('DB_COLLATE', 'utf8mb4_unicode_ci');

/**#@+
 * Authentication Unique Keys and Salts.
 *
 * Change these to different unique phrases!
 * You can generate these using the {@link https://api.wordpress.org/secret-key/1.1/salt/ WordPress.org secret-key service}
 * You can change these at any point in time to invalidate all existing cookies. This will force all users to have to log in again.
 *
 * @since 2.6.0
 */
define('AUTH_KEY',         'o8wpc6n66l270a8axjrmhcy5afl8ttgf8bj9lm3hji103rchpgw88f0wuxjfcwqd');
define('SECURE_AUTH_KEY',  '3jbho525q0dabjkgcpkg2yvuncwganxcjas0ikq7drgxa62my8h6tvut4a34pujx');
define('LOGGED_IN_KEY',    '1acslrj7hblucj7nnnsvi91t8v77kf8jl7omi5gfc3v8nvca46lndpchjtqd27jq');
define('NONCE_KEY',        'b6nacyj0crhfol2hs6gbqx71w957dn9al8hrjgrydf3rora6jcw2olw4sc3736aw');
define('AUTH_SALT',        'vl5vc4gy92ciqvbflfc5o4227jabrktlir61urdxal2fgl9xfokt21usbr28625v');
define('SECURE_AUTH_SALT', '7qljoppn8bcdggacnvi53616r5iyy4yr7qduyj0up3x1nv1o345t591bitfxod3a');
define('LOGGED_IN_SALT',   'g50jlcgt1qyy031blxcahqm1f20jfypw53jxxg83a67c73ir3dod3irbbguis13k');
define('NONCE_SALT',       'l5pti50j2wrxwrkclijp66x24r53auvf7kknsq7w733fr18x7my8lawm0p4hgtph');

/**#@-*/

/**
 * WordPress Database Table prefix.
 *
 * You can have multiple installations in one database if you give each a unique
 * prefix. Only numbers, letters, and underscores please!
 */
$table_prefix = 'wp_';

/**
 * WordPress Localized Language, defaults to English.
 *
 * Change this to localize WordPress. A corresponding MO file for the chosen
 * language must be installed to wp-content/languages. For example, install
 * de_DE.mo to wp-content/languages and set WPLANG to 'de_DE' to enable German
 * language support.
 */
define('WPLANG', 'zh_TW');

/**
 * For developers: WordPress debugging mode.
 *
 * Change this to true to enable the display of notices during development.
 * It is strongly recommended that plugin and theme developers use WP_DEBUG
 * in their development environments.
 */
define('WP_DEBUG', false);

/* That's all, stop editing! Happy blogging. */

/** Absolute path to the WordPress directory. */
if ( !defined('ABSPATH') )
        define('ABSPATH', dirname(__FILE__) . '/');



#define( 'WP_DEBUG', true );
#define( 'WP_DEBUG_LOG',true );
#define( 'WP_DEBUG_DISPLAY', false );


define( 'WP_MEMORY_LIMIT', '128M' );
define( 'WP_MAX_MEMORY_LIMIT', '256M' );




/** Sets up WordPress vars and included files. */
require_once(ABSPATH . 'wp-settings.php');

Note

/* MySQL database username /
define( 'DB_USER', 'hsinchug_wp1' );

/* MySQL database password /
define( 'DB_PASSWORD', 'Q.4Vyj8VCiedX1KYU5g05' );

3. 第二章

3.1. 秘密潜伏

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提交dylan的电话号码

提示告诉我们用 jwt

jwt爆破出来key是 4a4f7d6e8b5e3a0c7f
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117447685307

dylan 用户的密码 8f7a55c6d9a7d9a7
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