ToiToi Smash

I have read a blog post, where you can build your own privacy proxy server built on Raspberry PI. The post got me thinking about how I can use this to protect my privacy on my Android phone, and also get rid of those annoying ads.

Since I own a Samsung Galaxy S3 LTE with Android 4.3 (with a HW based Knox counter), rooting the phone now means you break Knox, and loose warranty. Past the point of no return ...

This means I have to solve this without root. Luckily newer Androids support VPN without rooting, but setting a mandatory system-wide proxy is still not possible without root.

But thanks to some iptables magic and Privoxy, this is not a problem anymore :)

The ingredients to build your own privacy protection proxy:

One (or more) cheap VPS server(s)
a decent VPN program
Privoxy
iptables

VPS server

To get the cheap VPS server, I recommend using Amazon EC2, but choose whatever you like. The micro instance is very cheap (or even free), and has totally enough resources for this task. I'm using the Ubuntu free tier now and it works like a charm. And last but not least Amazon has two-factor authentication! You can set up an Ubuntu server under 10 minutes. Use the AWS region nearest to you, e.g. I choose EU - Ireland.

VPN

For the VPN program, I recommend the free version of the OpenVPN AS (EDIT: be sure to use OpenVPN AS 2.0.6 or later, both on the server and the client). Easy to set-up quick start guide is here, GUI based configuration, and one-click client installer for Android, iOS, Windows, Linux, OSX. The Ubuntu installer packages are here.

The most important settings:

I prefer to use the TCP 443 and UDP 53 ports for my OpenVPN setup, and let the user guess why.
For good performance, UDP is preferred over TCP.
VPN mode is Layer 3 (routing/NAT).
Don't forget to allow the configured VPN ports in the AWS firewall (security groups).

Other VPN settings:

Should VPN clients have access to private subnets (non-public networks on the server side)? - Yes
Should client Internet traffic be routed through the VPN? - Yes

Privoxy

The next component we have to install and configure is Privoxy. As usual, "apt-get install privoxy" just works. The next step is to configure privoxy via /etc/privoxy/config file, there are two options to change:

listen-address your.ip.add.ress:8118
accept-intercepted-requests 1

Beware not to allow everyone accessing your Privoxy server in the AWS EC2 security groups, be sure it is reachable only to VPN users!

After everything is set, start privoxy with "service privoxy start", and add it to the autostart "update-rc.d privoxy defaults".

Iptables

And the final step is to configure your iptables chain to forward every web traffic from the VPN clients to the Privoxy server:

iptables -t nat -A PREROUTING -s 5.5.0.0/16 -p tcp -m multiport --dports 80,8080,81 -j DNAT --to-destination your.ip.add.ress:8118

Optionally you can block access to all other ports as well, and what does not go through your Privoxy won't be reachable.

Based on your Linux distribution and preference, you might make this rule persistent.

Final test

Now you can connect to the VPN server from your Android device.

After logging in from a client, you get the following nice packages to install on your device:

After connecting, the final results can be seen in the following screenshots. And yes, there is a reason I chose Angry Birds as an example.

Angry Birds without Privoxy

Angry Birds with Privoxy

Stupid flashlight app with ad

Stupid flashlight app with Privoxy

Spoiler alert

If you are afraid of NSA tracking you, this post is not for you. If you want to achieve IP layer anonymity, this post is not for you. As long as you are the only one using that service, it should be trivial to see what could possibly go wrong with that.

Known issues

Whenever the Internet connection (Wifi, 3G) drops, the VPN connection drops as well, and your privacy is gone ...

Sites breaking your privacy through SSL can still do that as long as the domain is not in the Privoxy blacklist.

Additional recommendation

If you are using OSX or Windows, I can recommend Aviator to be used as your default browser. It is just great, give it a try!

PS: There are also some adblock apps removed from the official store which can block some ads, but you have to configure a proxy for every WiFi connection you use, and it is not working over 3G.

MOST USEFUL HACKING TOOL

1-Nmap-Network Mapper is popular and free open source hacker's tool.It is mainly used for discovery and security auditing.It is used for network inventory,inspect open ports manage service upgrade, as well as to inspect host or service uptime.Its advantages is that the admin user can monitor whether the network and associated nodes require patching.

2-Haschat-It is the self-proclaimed world's fastest password recovery tool. It is designed to break even the most complex password. It is now released as free software for Linux, OS X, and windows.

3-Metasploit-It is an extremely famous hacking framework or pentesting. It is the collection of hacking tools used to execute different tasks. It is a computer severity framework which gives the necessary information about security vulnerabilities. It is widely used by cyber security experts and ethical hackers also.

4-Acutenix Web Vulnerability Scanner- It crawls your website and monitor your web application and detect dangerous SQL injections.This is used for protecting your business from hackers.

5-Aircrack-ng - This tool is categorized among WiFi hacking tool. It is recommended for beginners who are new to Wireless Specefic Program. This tool is very effective when used rightly.

6-Wireshark-It is a network analyzer which permit the the tester to captyre packets transffering through the network and to monitor it. If you would like to become a penetration tester or cyber security expert it is necessary to learn how to use wireshark. It examine networks and teoubleshoot for obstacle and intrusion.

7-Putty-Is it very beneficial tool for a hacker but it is not a hacking tool. It serves as a client for Ssh and Telnet, which can help to connect computer remotely. It is also used to carry SSH tunneling to byepass firewalls. So, this is also one of the best hacking tools for hackers.

8-THC Hydra- It is one of the best password cracker tools and it consist of operative and highly experienced development team. It is the fast and stable Network Login Hacking Tools that will use dictonary or bruteforce attack to try various combination of passwords against in a login page.This Tool is also very useful for facebook hacking , instagram hacking and other social media platform as well as computer folder password hacking.

9-Nessus-It is a proprietary vulnerability scanner developed by tennable Network Security. Nessus is the world's most popular vulnerability scanner according to the surveys taking first place in 2000,2003,2006 in security tools survey.

10-Ettercap- It is a network sniffing tool. Network sniffing is a computer tool that monitors,analyse and defend malicious attacks with packet sniffing enterprise can keep track of network flow.

11-John the Ripper-It is a free famous password cracking pen testing tool that is used to execute dictionary attacks. It is initially developed for Unix OS. The Ripper has been awarded for having a good name.This tools can also be used to carry out different modifications to dictionary attacks.

12-Burp Suite- It is a network vulnerability scanner,with some advance features.It is important tool if you are working on cyber security.

13-Owasp Zed Attack Proxy Project-ZAP and is abbreviated as Zed Attack Proxy is among popular OWASP project.It is use to find vulnerabilities in Web Applications.This hacking and penetesting tool is very easy to use as well as very efficient.OWASP community is superb resource for those people that work with Cyber Security.

14-Cain & Abel-It is a password recovery tool for Microsoft Operating System. It allow easy recovery of various kinds of passwords by sniffing the networks using dictonary attacks.

15-Maltego- It is a platform that was designed to deliver an overall cyber threat pictures to the enterprise or local environment in which an organisation operates. It is used for open source intelligence and forensics developed by Paterva.It is an interactive data mining tool.

These are the Best Hacking Tools and Application Which are very useful for penetration testing to gain unauthorized access for steal crucial data, wi-fi hacking , Website hacking ,Vulnerability Scanning and finding loopholes,Computer hacking, Malware Scanning etc.

This post is only for educational purpose to know about top hacking tools which are very crucial for a hacker to gain unauthorized access. We are not responsible for any type of crime.

Boring vulns found (warning, an almost exact copy from the Zeus blog post)

Clear text HTTP login - you can sniff the login password via MiTM, or steal the session cookies
No password policy - admins can set up really weak passwords
No anti brute-force - you can try to guess the admin's password. There is no default username, as there is no username handling!
Password autocomplete enabled - boring
Missing HttpOnly flag on session cookie - interesting when combining with XSS
No CSRF protection - e.g. you can upload new exe, bin files, turn plugins on/off :-( boring. Also the file extension check can be bypassed, but the files are stored in the database, so no PHP shell this time. If you check the following code, you can see that even the file extension and type is checked, and an error is shown, but the upload process continues. And even if the error would stop the upload process, the check can be fooled by setting an invalid $uptype. Well done ...

        if ($_FILES['file']['tmp_name'] && ($_FILES['file']['size'] > 0))         {                 $outstr = "<br>";                 set_time_limit(0);                 $filename = str_replace(" ","_",$_FILES['file']['name']);                 $ext = substr($filename, strrpos($filename, '.')+1);                 if( $ext==='bin' && $uptype!=='config' ) $outstr .= "<font class='error'>Bad CONFIG extension!</font><br>";                 if( $ext==='exe' && $uptype!=='body' && $uptype!=='exe' ) $outstr .= "<font class='error'>Bad extension!</font><br>";                  switch( $uptype )                 {                 case 'body': $ext = 'b'; break;                 case 'config': $ext = 'c'; break;                 case 'exe': $ext = 'e'; break;                 default: $ext = 'e';                 }                 $_SESSION['file_ext'] = $ext;                 if( isset($_POST['bots']) && trim($_POST['bots']) !== '')                 {                         $bots = explode(' ', trim($_POST['bots']));                         //writelog("debug.log", trim($_POST['bots']));                         $filename .= "_".(LastFileId()+1);                 }                 if( FileExist($filename) ) $filename .= LastFileId();                 $tmpName  = $_FILES['file']['tmp_name'];                 $fileSize = $_FILES['file']['size'];                 $fileType = $_FILES['file']['type'];                 ## reading all file for calculating hash                 $fp = fopen($tmpName, 'r');

Clear text password storage - the MySQL passwords are stored in php files, in clear text. Also, the login password to the form panel is stored in clear text.
MD5 password - the passwords stored in MySQL are MD5 passwords. No PBKDF2, bcrypt, scrypt, salt, whatever. MD5. Just look at the pure simplicity of the login check, great work!

$query = "SELECT * FROM users_t WHERE uPswd='".md5($pswd)."'";

ClickJacking - really boring stuff

SQL injection

SpyEye has a fancy history of SQL injections. See details here, here, here, video here and video here.

It is important to highlight the fact that most of the vulnerable functions are reachable without any authentication, because these PHP files lack user authentication at the beginning of the files.

But if a C&C server owner gets pwned through this vuln, it is not a good idea to complain to the developer, because after careful reading of the install guide, one can see:

"For searching info in the collector database there is a PHP interface as formgrabber admin panel. The admin panel is not intended to be found on the server. This is a client application."

And there are plenty of reasons not to install the formgrabber admin panel on any internet reachable server. But this fact leads to another possible vulnerability. The user for this control panel is allowed to remotely login to the MySQL database, and the install guide has pretty good passwords to be reused. I mean it looks pretty secure, there is no reason not to use that.

CREATE USER 'frmcpviewer' IDENTIFIED BY 'SgFGSADGFJSDGKFy2763272qffffHDSJ';

Next time you find a SpyEye panel, and you can connect to the MySQL database, it is worth a shot to try this password.

Unfortunately the default permissions for this user is not enough to write files (select into outfile):

Access denied for user 'frmcpviewer' (using password: YES)

I also made a little experiment with this SQL injection vulnerability. I did set up a live SpyEye botnet panel, created the malware install binaries (droppers), and sent the droppers to the AV companies. And after more and more sandboxes connected to my box, someone started to exploit the SQL injection vulnerability on my server!

63.217.168.90 - - [16/Jun/2014:04:43:00 -0500] "GET /form/frm_boa-grabber_sub.php?bot_guid=&lm=3&dt=%20where%201=2%20union%20select%20@a:=1%20from%20rep1%20where%20@a%20is%20null%20union%20select%20@a:=%20@a%20%2b1%20union%20select%20concat(id,char(1,3,3,7),bot_guid,char(1,3,3,7),process_name,char(1,3,3,7),hooked_func,char(1,3,3,7),url,char(1,3,3,7),func_data)%20from%20rep2_20140610%20where%20@a=3%23 HTTP/1.1" 200 508 "-" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E)"

Although the query did not return any meaningful data to the attacker (only data collected from sandboxes), it raises some legal questions.

Which company/organization has the right to attack my server?

police (having a warrant)
military (if we are at war)
spy agencies (always/never, choose your favorite answer)
CERT organisations?

But, does an AV company or security research company has the legal right to attack my server? I don't think so... The most problematic part is when they hack a server (without authorization), and sell the stolen information in the name of "intelligence service". What is it, the wild wild west?

The SQLi clearly targets the content of the stolen login credentials. If this is not an AV company, but an attacker, how did they got the SpyEye dropper? If this is an AV company, why are they stealing the stolen credentials? Will they notify the internet banking owners about the stolen credentials for free? Or will they do this for money?

And don't get me wrong, I don't want to protect the criminals, but this is clearly a grey area in the law. From an ethical point of view, I agree with hacking the criminal's servers. As you can see, the whole post is about disclosing vulns in these botnet panels. But from a legal point of view, this is something tricky ... I'm really interested in the opinion of others, so comments are warmly welcome.

On a side note, I was interested how did the "attackers" found the SpyEye form directory? Easy, they brute-forced it, with a wordlist having ~43.000 entries.

(Useless) Cross site scripting

Although parts of the SpyEye panel are vulnerable to XSS, it is unlikely that you will to find these components on the server, as these codes are part of the install process, and the installer fails to run if a valid install is found. And in this case, you also need the DB password to trigger the vuln...

Session handling

This is a fun part. The logout button invalidates the session only on the server side, but not on the client side. But if you take into consideration that the login process never regenerates the session cookies (a.k.a session fixation), you can see that no matter how many times the admin logs into the application, the session cookie remains the same (until the admin does not close the browser). So if you find a session cookie which was valid in the past, but is not working at the moment, it is possible that this cookie will be valid in the future ...

Binary server

Some parts of the SpyEye server involve running a binary server component on the server, to collect the form data. It would be interesting to fuzz this component (called sec) for vulns.

Log files revealed

If the form panel mentioned in the SQLi part is installed on the server, it is worth visiting the <form_dir>/logs/error.log file, you might see the path of the webroot folder, IP addresses of the admins, etc.

Reading the code

Sometimes reading the code you can find code snippets, which is hard to understand with a clear mind:

$content = fread($fp, filesize($tmpName)); if ( $uptype === 'config' )     $md5 = GetCRC32($content); else $md5 = md5($content); .... <script> if (navigator.userAgent.indexOf("Mozilla/4.0") != -1) {         alert("Your browser is not support yet. Please, use another (FireFox, Opera, Safari)");         document.getElementById("div_main").innerHTML = "<font class=\'error\'>ChAnGE YOuR BRoWsEr! Dont use BUGGED Microsoft products!</font>"; } </script>

Decrypting SpyEye communication

It turned out that the communication between the malware and C&C server is not very sophisticated (Zeus does a better job at it, because the RC4 key stream is generated from the botnet password).

function DeCode($content) {         $res = '';         for($i = 0; $i < strlen($content); $i++)         {                 $num = ord($content[$i]);                 if( $num != 219) $res .= chr($num^219);         }         return $res; }

Fixed XOR key, again, well done ...

This means that it is easy to create a script, which can communicate with the SpyEye server. For example this can be used to fill in the SpyEye database with crap data.

import binascii import requests import httplib, urllib  def xor_str(a, b):     i = 0     xorred = ''     for i in range(len(a)):         xorred += chr(ord(a[i])^b)     return xorred              b64_data= "vK6yv+bt9er17O3r6vqPnoiPjZb2i5j6muvo6+rjmJ/9rb6p5urr6O/j/bK+5uP16/Xs7evq9ers7urv/bSo5u316vXs7evq/a6v5pq/trK1/bi4qbjm453j6uPv7Or9tr/u5um+uuvpve3p7eq/4+vsveLi7Lnqvrjr6ujs7rjt7rns/au3vOa5sre3srW8s7q2tr6p4Lm3tLiw4LmuvKm+q7Spr+C4uPu8qbq5ub6p4Li4vKm6ubm+qeC4qb6/sq+8qbq54LiuqK+0tri0tbW+uK+0qeC/v7So4L+1qLqrsuC+trqyt7ypurm5vqngvb24vqmvvKm6ubm+qeC9/aivuq/mtLW3srW+" payload =xor_str (binascii.a2b_base64(b64_data), 219)  print ("the decrypted payload is: " + payload) params = (binascii.b2a_base64(xor_str(payload,219))) payload = {'data': params} r = requests.post("http://spyeye.localhost/spyeye/_cg/gate.php", data=payload)

Morale of the story?

Criminals produce the same shitty code as the rest of the world, and thanks to this, some of the malware operators get caught and are behind bars now. And the law is behind the reality, as always.

ToiToi Smash

水曜日, 5月 31, 2023

BYOPPP - Build Your Own Privacy Protection Proxy