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Jan Hoistad Ph.D., LP

There are many goodware and malware developed in pascal, and we will see that the binary generated by the pascal compilers is fascinating, not only because the small and clean generated binaries, or the clarity of the pascal code, but also the good performance. In Linux we have Lazarus which is a good free IDE like Delphi and Kylix the free pascal IDE for windows.

The program:

program strtest;

var
cstr: array[0..10] of char;
s, s2: ShortString;

begin
cstr := 'hello world';
s := cstr;
s2 := 'test';

WriteLn(cstr + ' ' + s + ' ' + s2);
end.

We are going to compile it with freepascal and lazarus, and just the binary size differs a lot:

lazarus 242,176 btytes 845 functions
freepascal 32,256 bytes 233 functions
turbopascal 2,928 bytes 80 functions (wow)

And surprisingly turbopascal binaries are extremely light.
Lets start with lazarus:

Logically it imports from user32.dll some display functions, it also import the kernel32.dll functions and suspiciously the string operations of oleaut32.dll

And our starting point is a function called entry that calls the console initialization and retrieve some console configurations, and then start a labyrinth of function calls.

On functions 10000e8e0 there is the function that calls the main function.

I named execute_param2 because the second param is a function pointer that is gonna be executed without parameters, it sounds like main calling typical strategy.
And here we are, it's clearly the user code pascal main function.

What it seems is that function 100001800 returns an string object, then is called its constructor to initialize the string, then the string is passed to other functions that prints it to the screen.

This function executes the method 0x1c0 of the object until the byte 0x89 is a null byte.
What the hell is doing here?
First of all let's create the function main:

Simply right button create function:

After a bit of work on Ghidra here we have the main:

Note that the struct member so high like 0x1b0 are not created by default, we should import a .h file with an struct or class definition, and locate the constructor just on that position.

The mysterious function was printing byte a byte until null byte, the algorithm the compiler implemented in asm is not as optimized as turbopascal's.

In Windbg we can see the string object in eax after being created but before being initialized:

Just before executing the print function, the RCX parameter is the string object and it still identical:

Let's see the constructor code.
The constructor address can be guessed on static walking the reverse-cross-references to main, but I located it in debugging it in dynamic analysis.

The constructor reads only a pointer stored on the string object on the position 0x98.

And we have that the pointer at 0x98 is compared with the address of the literal, so now we know that this pointer points to the string.
The sentence *string_x98 = literal confirms it, and there is not memory copy, it only points reusing the literal.

Freepascal

The starting labyrinth is bigger than Lazarus so I had to begin the maze from the end, searching the string "hello world" and then finding the string references:

There are two ways to follow the references in Ghidra, one is [ctrl] + [shift] + F but there is other trick which is simply clicking the green references texts on the disassembly.

At the beginning I doubted and put the name possible_main, but it's clearly the pascal user code main function.

The char array initialization Is converted by freepascal compiler to an runtime initialization using mov instructions.

Reducing the coverage on dynamic we arrive to the writeln function:

EAX helds a pointer to a struct, and the member 0x24 performs the printing. In this cases the function can be tracked easily in dynamic executing the sample.

And lands at 0x004059b0 where we see the WriteFile, the stdout descriptor, the text and the size supplied by parameter.

there is an interesting logic of what happens if WriteFile() couldn't write all the bytes, but this is other scope.
Lets see how this functions is called and how text and size are supplied to figure out the string object.

EBX helds the string object and there are two pointers, a pointer to the string on 0x18 and the length in 0x18, lets verify it on windbg.

And here we have the string object, 0x0000001e is the length, and 0x001de8a68 is the pointer.

Thanks @capi_x for the pascal samples.

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Jan Hoistad Ph.D., LP

In this article, I'm going to provide you a list of resources which I have found very useful. I don't remember all of them from top of my head so I might miss some. This list will be updated on usual basis. Hope you'll find some good stuff to learn. If you have got suggestions leave them down below in the comments section.

Free Hands on Labs:

1. Hack The Box - live machines to hack your way around. Besides boxes they have awesome challenges and great labs to try out.

2. TryHackMe - great way to learn pentesting while doing it. Lots of machines to hack and lots of ground to cover.

3. Portswigger Web Security Academy - learn web application pentesting.

Free Training (Mostly Introductory stuff):

1. Tenable University - training and certification on Nessus etc.

2. Palo Alto Networks - Palo Alto Networks offers an abundance of resources to prepare for there certifications. The training is free but the exams cost.

3. Open P-TECH - has an introductory course on Cybersecurity Fundamentals.

4. IBM Security Learning Academy - has many courses but focused on IBM security services and

products.

5. Cisco Networking Academy - not all courses are free but Introduction to Cybersecurity and Cybersecurity Essentials are free.

6. AWS Training and Certification - has some free cloud security training courses.

7. Metasploit Unleashed - Free Online Ethical Hacking Course - Offensive Security's free online course on metasploit.

8. Coursera and Edx - you already know about them.

Blogs:

1. HackTricks - This is simply an awesome blog just visit it and you'll fall in love.

2. pentestmonkey - I visit it most of the time for one-liner reverse shells they are awesome.

3. Rasta Mouse

Writeups:

1. 0xdf

2. Snowscan

3. RootFlag.io

4. xct@vulndev

5. Rana Khalil

YouTube:

1. ippsec - an awesome YouTube channel with tons of information in every video. New video comes out weekly as soon as the machine on hackthebox expires. https://ippsec.rocks for video searching

2. xct - short walkthroughs on hackthebox machines.

3. Cristi Vlad - advice and content on pentesting and python.

4. LiveOverflow - reverse engineering on steroids.

5. SANS Pen Test Training - SANS institute webinars and talks.

6. VbScrub - great pentesting videos.

7. BinaryAdventure - great pentesting and reverse engineering videos.

8. GynvaelEN - great videos and talks about CTFs and pentesting.

GitHub Repos:

1. PayloadsAllTheThings - heaven of hackers.

2. Pentest Monkey - reverse shells and more.

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Jan Hoistad Ph.D., LP

"The Samurai Web Testing Framework is a live linux environment that has been pre-configured to function as a web pen-testing environment. The CD contains the best of the open source and free tools that focus on testing and attacking websites. In developing this environment, we have based our tool selection on the tools we use in our security practice. We have included the tools used in all four steps of a web pen-test." read more...

Website: http://samurai.inguardians.com

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Jan Hoistad Ph.D., LP

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.

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Sunday, January 28, 2024

Reversing Pascal String Object

Freepascal

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Learning Resources For Hacking And Pentesting

Free Hands on Labs:

Free Training (Mostly Introductory stuff):

Blogs:

Writeups:

YouTube:

GitHub Repos:

Samurai: Web Testing Framework

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Saturday, January 27, 2024

Best Hacking Tools

MOST USEFUL HACKING TOOL

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.

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.

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.

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.

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.

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