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This is a project I did several years ago on the dinofab website. It’s been so popular there and on my old YouTube channel that I decided to post it here on hack A Week.

I work as an automotive technician at my “day job”. Nearly all of the cars I work on have fuel injection systems. They all have several things in common: a control unit, a fuel pump, sensors and fuel injectors. Fuel injectors are made up of a coil of wire which opens a valve when energized. It’s a basically an electronic solenoid valve.

As time goes by these “valves” can wear out and become sluggish, leaky or just quit working. They’re pretty easy to test by simply applying 12 volts to the leads and listening for a click sound. But, that doesn’t tell the whole story. A better way to test them is to send a series of electrical pulses to them and see how much fuel they deliver. First a fuel pressure gauge is connected in line on the fuel rail, then the fuel pump is turned on momentarily to build pressure then turned off. The fuel injector gets a pulsed signal for a given duration and the pressure drop is noted. The process is repeated with the remaining injectors for comparison. Sometimes a few may have a different delivery rate which can be a great aid in troubleshooting a poor running engine.

Rainbow Six: Siege Hacks. Rainbow Six: Siege is an online tactical shooting game that offers both first-person and third-person perspective for the players according to their style preference. Rainbow Six Siege is a successor to Rainbow six: Patriots that had more emphasis on campaign mode. God mode in Ranked?! Lol how does the game not detect this XD. Well, enjoy this rainbow six siege hacker gameplay and I guess the hacker created content, he.

• Internal Triggerbot For Rainbow Six Siege! Steps to use it: 1. Download the attachment 2. Open Extreme Injector or any other injector (Credits to respective developers) 4. Click 'Add DLL' 5. Select 'InternalTriggerbot.dll' included in the folder 6. Now it will auto shoot when you aim at enemy!
• +rep quick response purchased the key without a problem, the cheat was a bit weird to start first but I got it working the ESP is really good and so is the smart aimbot on this cheat Highly recommend this over CovertCheats, the only downside for this cheat is no spoofer available but further than that the cheat works really well!

These devices are available for $140 – $400 depending on their capabilities.
I decided that I could build one myself for very little money using the classic 555 timer chip and a few external components.

Below you’ll find a list of parts and some links to a few web pages that will help you understand the workings of the 555.
There’s also a build video which will show you how I put this together. This circuit will output a series of square wave pulses that are 8 mS on and 7 mS off for a duration of one second.

A word of caution about the N-channel MOSFET. Be very careful of the pin outs! These tend to vary depending on the manufacturer. Make sure you know the exact location of the gate, drain and source! Connecting one wrong will fry the 555 chip AND the transistor!
Be sure to add a protection diode between the source and drain even though most MOSFETs have them internally.

Notes on the schematic. I’ve been revising the schematic as I receive suggestions from people. Here and there I’ve added a few resistors and diodes that were not on the original design. Feel free to send any suggestions my way and I’ll include them. If you can’t find LEDs that are rated at 12 volts, be sure to add the proper resistor in series with your LED.

UPDATE: I’ve had a few emails asking if this will drive a Diesel injector. The answer is, NO. The MOSFET in this circuit is rated at 4 amps and Diesel injectors need 15 – 25 amps. Attempting to drive this kind of load will damage the MOSFET and possibly other components.
However, you CAN replace part # IRF510 MOSFET with a part # MTP75N03HDL Motorla MOSFET. The Motorola has a 75 amp rating.
Here is the datasheet: http://www.datasheetcatalog.org/datasheet/motorola/MTP75N03HDL.pdf
Here is where to buy one: http://www.allelectronics.com/index.php?page=search&search_query=MTP75N03HDL&x=0&y=0

UPDATE ON NEW ALTERNATE SCHEMATIC:
I’ve designed another schematic below with two more switches and a 4.7 mF capacitor added.
SW1 is used to choose between a timed or continuous ouput.
SW2 is used to choose between a 1 second or 5 second ouput.
The only extra parts needed to build the circuit this way are:
1 – 4.7 mF capacitor and 2 – spdt switches.
I’ve updated the parts list to include these extra parts.

I encourage you to try building other circuits with the 555. It’s a very versatile chip with many applications.
Have fun and keep on making stuff! ( that was before I said “keep on hackin” )

Questions? Email me at: makerdino@gmail.com

Final draft of schematic as built:

Parts list:
1 – Radio Shack proto type circuit board
2 – 555 timer 8 pin DIP chips
3 – 100 ohm resistors – R1, R5, R9
1 – 470 ohm resistor – R6
3 – 100 K ohm resistors – R2, R3, R7
1 – 10 ohm resistors – R8
1 – Meg ohm resistor – R4
1 – 47 mF capacitor – C1
1 – 22 mF capacitor – C7
3 – 0.1 mF ceramic disc capacitor – C2, C3, C6
1 – 1 mF Tantalum capacitor – C4
1 – 4.7 mF capacitor – C5
1 – 1N4002 diode D1
1 – 1N4742 12v Zener diode – D2
1 – Red LED 12v rated
1 – Green LED 12v rated
1 – N-Channel MOSFET transistor – Q1
Radio shack part #276-2072
1 – Momentary contact switch – SW3
2 – spdt switches – SW1, SW2
2 – Aligator clips
A few feet of double strand wire
1 – Project enclosure box

USEFUL LINKS:

Here’s the Express PCB layout file in zip format:fuel injector tester

ExpressPCB: This site offers a free download of a schematic and PCB design tool that’s easy to use. See screenshot above. They also offer fabrication of PCBs. Download the free software here: ExpressPCB

Rob Paisley’s 555 timer circuit page: This has a TON of great info on the 555 including a few timing calculators to aid in component selection. http://home.cogeco.ca/~rpaisley4/LM555.html

Doctronics: Another great website with a lot of cool info and circuits for the 555. http://www.doctronics.co.uk/555.htm

Octopart: This site offers up a search engine similar to Google but it’s especially for electronic component part numbers. http://octopart.com/

The brute force attack is still one of the most popular password-cracking methods. Nevertheless, it is not just for password cracking. Brute force attacks can also be used to discover hidden pages and content in a web application. This attack is basically “a hit and try” until you succeed. This attack sometimes takes longer, but its success rate is higher.

In this article, I will try to explain brute force attacks and popular tools used in different scenarios for performing brute force attacks to get desired results.

What is a brute force attack?

A brute force attack when an attacker uses a set of predefined values to attack a target and analyze the response until he succeeds. Success depends on the set of predefined values. If it is larger, it will take more time, but there is a better probability of success.

The most common and easiest to understand example of the brute force attack is the dictionary attack to crack passwords. In this, the attacker uses a password dictionary that contains millions of words that can be used as a password. The attacker tries these passwords one by one for authentication. If this dictionary contains the correct password, the attacker will succeed.

In a traditional brute force attack, the attacker just tries the combination of letters and numbers to generate a password sequentially. However, this traditional technique will take longer when the password is long enough. These attacks can take several minutes to several hours or several years, depending on the system used and length of password.

To prevent password cracking from brute force attacks, one should always use long and complex passwords. This makes it hard for attackers to guess the password, and brute force attacks will take too much time. Account lockout is another way to prevent the attacker from performing brute force attacks on web applications. However, for offline software, things are not as easy to secure.

Similarly, for discovering hidden pages, the attacker tries to guess the name of the page, sends requests and sees the response. If the page does not exist, it will show a 404 response; on a success, the response will be 200. In this way, it can find hidden pages on any website.

Brute force is also used to crack the hash and guess a password from a given hash. In this, the hash is generated from random passwords and then this hash is matched with a target hash until the attacker finds the correct one. Therefore, the higher the type of encryption (64-bit, 128-bit or 256-bit encryption) used to encrypt the password, the longer it can take to break.

Reverse brute force attack

A reverse brute force attack is another term that is associated with password cracking. It takes a reverse approach in password cracking. In this, the attacker tries one password against multiple usernames. Imagine if you know a password but do not have any idea of the usernames. In this case, you can try the same password and guess the different usernames until you find the working combination.

Now, you know that a brute-forcing attack is mainly used for password cracking. You can use it in any software, any website or any protocol which does not block requests after a few invalid trials. In this post, I am going to add a few brute force password-cracking tools for different protocols.

Popular tools for brute force attacks

Aircrack-ng

I am sure you already know about the Aircrack-ng tool. This is a popular brute force wifi password cracking tool available for free. I also mentioned this tool in our older post on most popular password-cracking tools. This tool comes with WEP/WPA/WPA2-PSK cracker and analysis tools to perform attacks on Wi-Fi 802.11. Aircrack-ng can be used for any NIC which supports raw monitoring mode.

It basically performs dictionary attacks against a wireless network to guess the password. As you already know, the success of the attack depends on the dictionary of passwords. The better and more effective the password dictionary is, the more likely it is that it will crack the password.

It is available for Windows and Linux platforms. It has also been ported to run on iOS and Android platforms. You can try it on given platforms to see how this tool can be used for brute force wifi password cracking.

Download Aircrack-ng here.

John the Ripper

John the Ripper is another awesome tool that does not need any introduction. It has been a favorite choice for performing brute force attacks for a long time. This free password-cracking software was initially developed for Unix systems. Later, developers released it for various other platforms. Now, it supports fifteen different platforms including Unix, Windows, DOS, BeOS and OpenVMS.

You can use this either to identify weak passwords or to crack passwords for breaking authentication.

This tool is very popular and combines various password-cracking features. It can automatically detect the type of hashing used in a password. Therefore, you can also run it against encrypted password storage.

Basically, it can perform brute force attacks with all possible passwords by combining text and numbers. However, you can also use it with a dictionary of passwords to perform dictionary attacks.

Download John the Ripper here.

Rainbow Crack

Rainbow Crack is also a popular brute-forcing tool used for password cracking. It generates rainbow tables for using while performing the attack. In this way, it is different from other conventional brute-forcing tools. Rainbow tables are pre-computed. It helps in reducing the time in performing the attack.

The good thing is that there are various organizations which have already published the pre-computer rainbow tables for all internet users. To save time, you can download those rainbow tables and use them in your attacks.

This tool is still in active development. It is available for both Windows and Linux and supports all latest versions of these platforms.

Download Rainbow Crack and read more about this tool here.

L0phtCrack

L0phtCrack is known for its ability to crack Windows passwords. It uses dictionary attacks, brute force attacks, hybrid attacks and rainbow tables. The most notable features of L0phtcrack are scheduling, hash extraction from 64-bit Windows versions, multiprocessor algorithms and network monitoring and decoding. If you want to crack the password of a Windows system, you can try this tool.

Download L0phtCrack here.

Ophcrack

Ophcrack is another brute-forcing tool specially used for cracking Windows passwords. It cracks Windows passwords by using LM hashes through rainbow tables. It is a free and open-source tool.

In most cases, it can crack a Windows password in a few minutes. By default, Ophcrack comes with rainbow tables to crack passwords of less than 14 characters which contain only alphanumeric characters. Other rainbow tables are also available to download.

Ophcrack is also available as LiveCD.

Download Ophcrack here.

Hashcat

Hashcat claims to be the fastest CPU-based password cracking tool. It is free and comes for Linux, Windows and Mac OS platforms. Hashcat supports various hashing algorithms including LM Hashes, MD4, MD5, SHA-family, Unix Crypt formats, MySQL and Cisco PIX. It supports various attacks including brute force attacks, combinator attacks, dictionary attacks, fingerprint attacks, hybrid attacks, mask attacks, permutation attack, rule-based attacks, table-lookup attacks and toggle-case attacks.

Download Hashcat here.

DaveGrohl

DaveGrohl is a popular brute-forcing tool for Mac OS X. It supports all available versions of Mac OS X. This tool supports both dictionary attacks and incremental attacks. It also has a distributed mode that lets you perform attacks from multiple computers to attack on the same password hash.

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This tool is now open-source and you can download the source code.

Download DaveGrohl here.

Ncrack

Ncrack is also a popular password-cracking tool for cracking network authentications. It supports various protocols including RDP, SSH, HTTP(S), SMB, POP3(S), VNC, FTP and Telnet. It can perform different attacks including brute-forcing attacks. It supports various platforms including Linux, BSD, Windows and Mac OS X.

Download Ncrack here.

THC Hydra

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THC Hydra is known for its ability to crack passwords of network authentications by performing brute force attacks. It performs dictionary attacks against more than 30 protocols including Telnet, FTP, HTTP, HTTPS, SMB and more. It is available for various platforms including Linux, Windows/Cygwin, Solaris 11, FreeBSD 8.1, OpenBSD, OSX and QNX/Blackberry.

Download THC Hydra here.

Conclusion

These are a few popular brute-forcing tools for password cracking. There are various other tools are also available which perform brute force on different kinds of authentication. If I just give an example of a few small tools, you will see most of the PDF-cracking and ZIP-cracking tools use the same brute force methods to perform attacks and crack passwords. There are many such tools available for free or paid.

Brute-forcing is the best password-cracking method. The success of the attack depends on various factors. However, factors that affect most are password length and combination of characters, letters and special characters. This is why when we talk about strong passwords, we usually suggest that users have long passwords with a combination of lower-case letters, capital letters, numbers and special characters. It does not make brute-forcing impossible but it does make it difficult. Therefore, it will take a longer time to reach to the password by brute-forcing.

Almost all hash-cracking algorithms use the brute force to hit and try. This attack is best when you have offline access to data. In that case, it makes it easy to crack and takes less time.

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Brute force password cracking is also very important in computer security. It is used to check the weak passwords used in the system, network or application.

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The best way to prevent brute force attacks is to limit invalid logins. In this way, attacks can only hit and try passwords only for limited times. This is why web-based services start showing captchas if you hit the wrong passwords three times or they will block your IP address.