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🦑 2020 The Mobile Security Testing Guide (MSTG) is a comprehensive manual for mobile app security development, testing and reverse engineering :
T.me/UnderCodeTesting

🦑LETS START:

1) git clone https://github.com/OWASP/owasp-mstg/

2) cd owasp-mstg/Tools/

3) ./generate_document.sh

4) Clone the repository and run the gitbook generator.

🦑 This produces PDF, Epub and Mobi files in the "Generated" subdirectory.

1) git clone https://github.com/OWASP/owasp-mstg/

2) cd owasp-mstg/Tools/

3) ./gitbookandpdf.sh

check more on same git link

@UndercOdeTesting
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🦑Automate dns spoof - traffic hack :
T.me/UndercOdeTesting

🦑𝕀ℕ𝕊𝕋𝔸𝕃𝕃𝕀𝕊𝔸𝕋𝕀𝕆ℕ & ℝ𝕌ℕ:

1) git clone https://github.com/Trackbool/DerpNSpoof'
You need the Scapy Python module. You can install the requirements

2) with: 'pip3 install -r requirements.txt' (recomended) or manually 'pip3 install scapy'

3) Scapy uses tcpdump

4) To execute the tool, you will need root permissions
Help menu:

🦑commands :
<ip> - Spoof the DNS query packets of a certain IP address
<all> - Spoof the DNS query packets of all hosts
[!] Examples:
# python3 DerpNSpoof.py 192.168.1.20 myfile.txt
# python3 DerpNSpoof.py all myfile.txt
The file format to save the records is very simple. You have to store the domain name, and separated by a space, the fake IP in the same line

Domain to Spoof IP address
example.com 1.1.1.1
example2.com 3.3.3.3
example3.com 3.3.3.3
Note:


@UndercOdeTesting
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Mm so Guyz want written Tutorials, well let s send some PHp Shell By UndercOde

▁ ▂ ▄ ｕ𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑 shell-log in for a limited time :
instagram.com/UnderCodeTestingCompany

🦑 𝕃𝔼𝕋𝕊 𝕊𝕋𝔸ℝ𝕋 :

time-limited login can be achieved by calling at and system maintenance functions through the following three script programs:

1) In the specified When the script is executed within a certain time, a file named nologin will be generated under / etc. When the login program is executed, it will automatically determine whether this file exists. If it exists, the user will not be allowed to log in. The content is:
vi /sbin/login.denied
echo "Login Denied"> / etc / nologin
chmod 700 login.denied

2) Execute the script at the specified time, delete the nologin file under / etc / to allow users to log in, the content is:
vi /sbin/login.allowed
if [ -f / etc / nologin]; then
rm / etc / nologin
fi
chmod 700 login.allowed

3) Write a time-limited script that reads:
vi /sbin/login.rollback
if [-f /sbin/login.denied] ; then
at -f /sbin/login.denid 22:00
fi
if [-f /sbin/login.allowed]; then
at -f /sbin/login.allowed 8:00
if
chmod 744 /sbin/login.rollback is

4) created, put the /sbin/login.rollback script into crontab , Executed in the early morning every day:
crontab -e
# roll login script
00 1 * * * /sbin/login.rollback

5) The function of this setting is: from 10:00 PM to 8:00 AM the next day, a non-root user logs in, Displayed as system maintenance status.

Written by Underc0de
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🦑 shell-Can you use Shell to query, modify, delete, etc. SQL?
pinterest.com/UnderCodeOfficial

🦑 𝕃𝔼𝕋𝕊 𝕊𝕋𝔸ℝ𝕋 :

#! / Usr / bin / ksh
SQL_EXEC ()
{
sqlplus the USER $ / $ @ $ DB the PASSWD <<!
SET LINESIZE 1024
SET pageSize 1024
$ SQLCOMM
quit
!
}

#select
SQLCOMM = "SELECT 'XXX', username from the all_users;"

SQL_EXEC | grep XXX

#insert, Delete omitted

with INformIX yo prompts what to do if sql_exec cannot be found.

I think this should work,
#vi query.sh
sqlplus $ USER / $ PASSWD << EOF
select …… from …………
insert ………………
delete ………………
EOF
: wq
# query.sh

isql <<!
database dbname;
select * from tbname where fieldname="xxxxx";
delete from tbname;
.....
close database;
!

Written by Underc0de
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▁ ▂ ▄ ｕ𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑 PHP can also be used as Shell Script Why PHP is so
popular Recently PHP (Personal Hypertext Preprocessor) seems to have become the most widely used web processing language on Linux by Underc0de :
instagram.com/UnderCodeTestingCompany

🦑 𝕃𝔼𝕋𝕊 𝕊𝕋𝔸ℝ𝕋 :

1) Unix in the past two years. Its convenience, powerful functions and OpenSource features have gradually eroded it. In the traditional CGI and even the MicroSoft ASP (Active Server Page) market, almost every major website recruits people with PHP as its basic condition.

2) PHP does have this qualification and can be so
popular for several reasons: PHP is OpenSource software, completely free and can be distributed freely, so it has attracted a lot of people to use it, and because of this, it has attracted commercial companies to develop it better Engine and optimization software

3) PHP itself is very simple and easy to understand, with a simple instruction syntax, plus some basic object-oriented processing capabilities, so that novices can learn in the shortest time.
PHP provides quite a lot of functions, including mathematical processing, string processing, network-related functions, support for various databases, image processing functions, and a large number of developers are developing various new functions for PHP, expanding Excellent sex.

4) PHP is very easy to combine with Apache. It is used as an Apache module, and it is quite simple to set up and install. Because Apache has already occupied 60% of the global Web Server market, PHP naturally becomes the best combination of Apache.

> However, the topic this time is not the application of PHP in web design, but the application of PHP in Shell Script. Generally known Shell Script is about tcsh, bash, perl or python. It's all about using PHP as a shell script.

🦑I nstallation of PHP executable files

1) Generally, PHP as a webpage processing language is compiled into Apache modules. Of course, it is not necessary to do this, so it is very easy to compile. As long as you are root, perform the following actions:
Unzip php-3.0.xx. After tar.gz

> cd php

> configure

> make is

2) compiled, there is an executable file in the php directory named php and you can copy it to / usr / local / bin. Note that if the file is too large, you can use the strip command to remove unnecessary information from PHP, so the file will be much smaller.

🦑 The first program
starts writing our first PHP Shell Script program. This example prints "Hello world!":
#! / Usr / local / bin / php -q
<?
Echo "Hello, world!";
?>
Note that PHP was originally used in web applications, so it will definitely send HTML headers, but here we are using PHP as a shell script, "-q"

1) In this example, / usr / local / bin / php is meant to execute PHP under / usr / local / bin / because we just installed it there. The echo command prints "Hello, world!", where the "" character is a newline character.
Note that after saving this program as a file, you must change its chmod to an executable attribute (chmod + x file name) before you can run it.
Advanced use of I

2) Sometimes we need to input some parameters when the program is executed, such as the ls command, followed by the -l parameter. PHP Shell Script also supports this usage. There are two special variables: $ argc keeps track of the number of arguments passed in, and the $ argv [] array argument holds the contents of the argument. For example, I want to design a program that calculates the sum of two numbers:
#! / Usr / local / bin / php -q
<?
$ Sum = 0;
$ sum = $ sum + $ argv [1] + $ argv [2] ;
echo $ sum;
?>

3) Assuming this program is named sum.php3, execute sum.php3 1 2 Press enter and it will print 3.

4) If you want to calculate an unspecified number of parameters, you need to use the special variable $ argc:
#! / Usr / local / bin / php -q
<?
$ Sum = 0;
for ($ t = 1; $ t <= $ argc; $ t ++)
$ sum = $ sum + $ argv [$ t];
echo $ sum;
?>

»🦑 php/shell full by under0de
5) Assuming this program is named bigsum.php3, then running bigsum.php3 1 2 3 4 5 Pressing enter will print 15; executing bigsum.php3 1 2 3 4 5 6 pressing enter will Print out 21.

6) Sometimes we need to input data during the execution of the program, but PHP is originally used for web design, and the data input on the webpage is naturally input by FORM, so the problem comes when PHP is used as the shell script In PHP, a file opening function is provided. Under Linux / Uinx, inputting can be done by opening files. We need to open the device file / dev / stdin (stdin is (Meaning standard input), the program is as follows:
#! / Usr / local / bin / php -q
<?
$ Fp = fopen ("/ dev / stdin", "r");
$ inputstr = fgets ($ fp, 100 );
fclose ($ fp);

echo "\ n ---------------------- \ n";
echo $ inputstr;
?>

7) where fgets ($ fp , 100) refers to the file $ fp (that is, "/ dev / stdin" ) Read out 100 bytes of data, the program will stop at this line and wait for our input. After we enter and press enter, the program will print out the data we just entered.
Advanced Use II

8) Although it can already handle input, such a function is obviously too simple to cope with larger applications. For example, I need a function to remove the HTML from a data stream. At this time, it needs to be complete. The ability to handle output and input redirection, we can first design the program as follows: #! / Usr / local / bin / php -q
<?
$ Fp = fopen ("/ dev / stdin", "r");

while (! Feof ( $ fp)) {
$ c = fgetc ($ fp);
$ inputstr = $ inputstr. $ c;
};

fclose ($ fp);

echo $ inputstr;
?>

9) Assuming this program is named filt.php3, if you directly Run this program, it will wait for your input, it will not print your input data until you press Ctrl + D, we can run it like this :
more filt.php3 | filt.php3

10) This way is to filter The .php3 program is shown with more and switched to the program filt.php3. Filt.php3 will continue to accept information (in fact, the code of the filt.php3 program), and finally print it out.
We can add HTML filtering to it:
#! / Usr / local / bin / php -q
<?
$ Fp = fopen ("/ dev / stdin", "

while (! feof ($ fp)) {
$ c = fgetc ($ fp);
$ inputstr = $ inputstr. $ c;
};

fclose ($ fp);

$ inputstr = ereg_replace ("<([^ <>] * )> "," ", $ inputstr);

echo $ inputstr;
?> We can add HTML filtering to it
#! / Usr / local / bin / php -q

🦑Assuming this program is named filt2.php3, then the filtering function is completed. If you do n’t believe me, please try an HTML file:
more xxx.html filt2.php3
You will see that the HTML TAG file has been deleted.

Written by Underc0de
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🦑 SHELL-PHP TUTORIALS @UndercOdeTesting

▁ ▂ ▄ ｕ𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑ACTIVE IP USED IN ATTACKING NOW:-UnderCode-Report-2020
T.me/UndercOdeTesting

IP Country Block Count
160.153.147.141 United States 5
37.9.169.9 Slovakia 4
47.254.89.228 United States 4
160.153.147.143 United States 3
64.71.32.73 United States 3
160.153.154.6 United States 2
198.71.238.7 United States 2
207.246.240.124 United States 2
198.71.238.5 United States 2
207.246.240.119 United States 2
62.210.185.4 France 2
160.153.147.161 United States 2
198.71.238.3 United States 2
198.71.239.46 United States 2
91.208.99.2 United Kingdom 2
198.71.238.9 United States 1
184.168.46.161 United States 1
64.71.32.78 United States 1
160.153.147.142 United States 1
184.168.27.169 United States 1
160.153.153.30 United States 1
160.153.154.26 United States 1
103.228.112.110 India 1
160.153.154.19 United States 1
160.153.147.160 United States 1
185.129.248.187 Spain 1
160.153.154.7 United States 1

@Underc0deoFFICIAL
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🦑Secure your linux first Network Filtering-Use netfilter-iptables to configure a firewall for Linux Part 1 full
netfilter / iptables is Integrated IP packet filtering system for the latest 2.4.x version of the Linux kernel(old and stable version)

> If the Linux system is connected to the Internet or a LAN, a server, or a proxy server that connects to the LAN and the Internet, the system facilitates better control of IP packet filtering and firewall configuration on the Linux system

> undercode will introduce the netfilter / iptables system, how it works, its advantages, installation and configuration, and how to use it to configure a firewall on a Linux system to filter IP packets.
twitter.com/UndercOdeTC

🦑 𝕃𝔼𝕋𝕊 𝕊𝕋𝔸ℝ𝕋 :

1) Among Linux packet filtering solutions such as ipfwadm and ipchains, the netfilter / iptables IP packet filtering system is the latest solution and the first solution integrated into the Linux kernel.

2) Netfilter / iptables system for Linux system
administrators, network administrators, and home users who want to configure a firewall based on their specific needs, save money on firewall solutions, and have full control over IP packet filtering Very ideal.

3) Understand firewall configuration and packet filtering
For Linux systems connected to the network, a firewall is an essential defense mechanism. It only allows legitimate network traffic to enter and leave the system, and prohibits any other network traffic.

4) To determine whether network traffic is legitimate, the firewall relies on a set of rules it contains that are predefined by the network or system administrator. These rules tell the firewall whether certain traffic is legitimate and what to do with network traffic from a source, a destination, or a protocol type. The term "configure firewall" means adding, modifying, and removing these rules. I will discuss these rules in detail later in undercode grps

5) Network traffic consists of IP packets (or packets for short) —small pieces of data that are transmitted in a stream from the source system to the destination system. These packets have headers, which are data bits that accompany each packet and contain information about the source, destination, and protocol type of the packet.

6) The firewall checks these headers against a set of rules to determine which packets to accept and which packets to reject. We call this process packet filtering.

Written by UnderCode
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▁ ▂ ▄ ｕ𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Why configure your own firewall on kernel linux ?
instagram.com/UndercOdeTestingCompany

🦑 𝕃𝔼𝕋𝕊 𝕊𝕋𝔸ℝ𝕋 :

1) For various reasons and reasons, you need to configure your firewall based on your specific needs. Perhaps the most important reason is security.

2) Administrators may want their firewall to be able to prevent unauthorized sources from accessing their Linux systems, such as through Telnet. They may also want to restrict network traffic to and from their systems so that only traffic from trusted sources can enter their systems, and only authorized traffic can go out. Home users may configure the firewall to a lower security level by allowing all outbound packets to pass through.

3) Another reason behind this is that bandwidth can be saved by blocking excess traffic from sources like advertising sites.

4) Thus, the firewall configuration can be customized to meet any specific needs and any security level needs. This is where the netfilter / iptables system comes in.

🦑 How does the netfilter / iptables system work?

1) netfilter / iptables IP packet filtering system is a powerful tool for adding, editing, and removing rules. These rules are rules that the firewall follows and composes when making packet filtering decisions.

2) These rules are stored in dedicated packet filtering tables, which are integrated in the Linux kernel. In the packet filtering table, rules are grouped into what we call a chain. I will discuss these rules in detail and how to build them and group them in chains.

3) Although the netfilter / iptables IP packet filtering system is called a single entity, it actually consists of two components, netfilter and iptables.

4) The netfilter component, also called kernelspace, is part of the kernel and consists of some packet filtering tables. These tables contain the set of rules that the kernel uses to control packet filtering processing.

5) The iptables component is a tool, also known as userspace, that makes it easy to insert, modify, and remove rules from packet filtering tables. Unless you are using Red Hat Linux 7.1 or later, you need to download the tool from netfilter.org and install it.

6) By using user space, you can build your own custom rules that are stored in a packet filter table in kernel space. These rules have destinations that tell the kernel what to do with packets that come from some source, go to some destination, or have certain protocol types. If a packet matches the rule, the destination ACCEPT is used to allow the packet to pass. You can also use target DROP or REJECT to block and kill packets. There are many other goals for other operations that can be performed on packets.

Written by UnderCode
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🦑 How firewall rules acts ?
pinterest.com/UndercOdeOfficial

1) Rules can be grouped in chains based on the type of packets processed by the rules.

2) Rules for processing inbound packets are added to the INPUT chain. Rules for processing outbound packets are added to the OUTPUT chain. Rules for processing packets being forwarded are added to the FORWARD chain.

3) These three chains are the default main chains built into the basic packet filtering table. In addition, there are many other types of chains available, such as PREROUTING and POTROUTING, as well as providing user-defined chains. Each chain can have a policy that defines a "default destination", that is, the default action to be performed, which is performed when a packet does not match any rule in the chain.

4) For A linux :

Once the rules are established and the chain is in place, the real packet filtering can begin. Kernel space takes over from user space. When a packet reaches the firewall, the kernel first checks the header information of the packet, especially the destination of the packet. We call this process routing.

5)If the packet originates from the outside world and goes to the system, and the firewall is open, the kernel passes it to the INPUT chain of the kernel-space packet filtering table. If the packet originates from another source within the system or on the internal network to which the system is connected, and this packet is destined for another external system, the packet is passed to the OUTPUT chain. Similarly, packets originating from and destined for an external system are passed to the FORWARD chain.

Written by UndercOde
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▁ ▂ ▄ ｕ𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑In Linux Firewalls - create your own part 2 Packet filtering process:
T.me/UndercOdeTesting

🦑LETS START:

> Before Installation Before starting to install the iptables userspace tool, you need to make some modifications to the system. First, you need to use the make config command to configure kernel options. During configuration, they must be turned on by setting the CONFIG_NETFILTER and CONFIG_IP_NF_IPTABLES options to Y, as this is required to make netfilter / iptables work. Here are other options you might want to turn on:

1) CONFIG_PACKET: This option is useful if you want applications and programs to use certain network devices directly.
CONFIG_IP_NF_MATCH_STATE: This option is very important and useful if you want to configure a stateful firewall. This type of firewall remembers previous decisions about packet filtering and makes new decisions based on them. I will discuss this further in the advantages section of the netfilter / iptables system.

2) CONFIG_IP_NF_FILTER: This option provides a basic packet filtering framework. If this option is turned on, a basic filter table (with built-in INPUT, FORWARD, and OUTPUT chains) is added to kernel space.
CONFIG_IP_NF_TARGET_REJECT: This option allows you to specify that ICMP error messages should be sent in response to inbound packets that have been dropped by DROP, rather than simply killing them.
Now you are ready to install this userspace tool.

🦑 Install the userspace tools :
> After downloading the source code for the iptables userspace tools (it's similar to iptables-1.2.6a.tar.bz2), you can begin the installation. You need to log in as root to perform the installation. Listing 1 shows an example that indicates the commands required to install the tool, their necessary order, and their descriptions.

1) Listing 1. Example of userspace tool installation
First, unpack the tool package into a directory:

# bzip2 -d iptables-1.2.6a.tar.bz2
# tar -xvf iptables-1.2.6a.tar

2) This will unpack the tool source into a directory named iptables-1.2.6a.
Now change to the iptables-1.2.6a directory:

# cd iptables-1.2.6a

3) The INSTALL file in this directory contains a lot of useful information
on compiling and installing this tool.

4) Now compile the userspace tool using the following command:

# make KERNEL_DIR = / usr / src / linux /

5) Here the KERNEL_DIR = / usr / src / linux / specifies the path to the kernel's
directory. If the directory of kernel happens to be different on some
systems, the appropriate directory path should be substituted for
/ usr / src / linux.

6) Now install the source binaries using the following command:

# make install KERNEL_DIR = / usr / src / linux /

> Now the installation is complete.

Written by UndercOde
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▁ ▂ ▄ ｕ𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑Android apps/Games hack- testing by UndercOde :
t.me/UndercOdeTesting

🦑LETS START:
> How to get more game points / money?

Note: This technique is not suitable for some online games.

1) Download the Game Killer app and install it on your Android device.
>https://apkpure.com/game-killer/com.charles.lpoqasert/download?from=details

2) Open Game Killer and allow root access


3) Open the game you want to hack, then check the current game points / money and write it down.

4) Click the Game Killer icon

5) Now enter the game funds you have and click the search icon. Then select "Automatic Recognition" and within two seconds you will see the search results.

6) Now go to Options> Data Controls> Modify all values. A small box will appear.

7) Enter the maximum value you can enter and click OK.

> That's it, it's perfect.

Written by UndercOde
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▁ ▂ ▄ ｕ𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑 How to hack an online Android game?- FOR BEGINERS
> Fact: You can also use this in some offline games.
T.me/UnderCodeTesting

🦑LETS START:

1) Download and install the Xmodgames application on your Android device.
> https://apkpure.com/xmodgames/com.satsaniz.aniz/download?from=details

2) Open the application and allow root access


3) Click on the application you want to crack (only when it says "Mod"), you will see the mod details.

example hack the 8 ball pool game

4) Click Install and wait for it to complete.

> Note: This application requires a working internet connection to install the mod.

5) Then click "Start" and the game will open. When you reach the main menu, a small window will pop up, if not, click on x-bot.

6) Click "Xmod".


7) Turn on the features, here is the infinite guide. Then close the floating window and play the game!

Wish you have fun ...

> Note: Using Xmodgames may prevent you from using the game. So use it with caution.

🦑 Now you might ask "What if Xmodgames doesn't have a game-specific mode?"

The answer is simple, just search for a modified version of the game on Google or any other search engine.


Written by UndercOde
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▁ ▂ ▄ ｕ𝕟𝔻Ⓔ𝐫Ć𝔬𝓓ⓔ ▄ ▂ ▁

🦑 for beginers ALL BZIP2 LINUX COMMANDS :
twitter.com/UndercOdeTC

🦑 #Function description: Compression program for .bz2 file by undercode

>Syntax: bzip2 [-cdfhkLstvVz] [-repetitive-best] [-repetitive-fast] [-compression level] [files to be compressed]

> Supplementary explanation: bzip2 uses a new compression algorithm, and the compression effect is better than traditional LZ77 / The LZ78 compression algorithm is good. If you do not add any parameters, bzip2 will generate a .bz2 compressed file after deleting the file, and delete the original file.

🦑 Parameters:

1) -c or --stdout send compressed and decompressed results to standard output.

2) -d or --decompress performs decompression.

3) -f or --force bzip2 When compressing or decompressing, if the output file has the same name as an existing file, the preset file will not be overwritten by default. To override, use this parameter.

4) -h or --help Display help.

5) -k or --keep bzip2 deletes the original file after compression or decompression. To keep the original file, use this parameter.

6) -s or --small reduces the amount of memory used during program execution.

7) -t or --test Test the integrity of the .bz2 compressed file.

8) -v or --verbose Display detailed information when compressing or decompressing files.

9) -z or --compress Force compression.

10) -L, --license,

11) -V or --version Display version information.

12) --repetitive-best If there are repeated data in the file, you can use this parameter to improve the compression effect.

13) --repetitive-fast If there is repeated information in the file, this parameter can be used to speed up the execution.

14) -Compression level Block size when compressed.


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