Cain & Abel, as a free Windows password recovery tool, isn't my top choice. It works similarly to other password recovery tools but the cons simply outweigh the pros.
Yes, it's free (and fast) but considering that you have to install it on the computer from a working user account, I can't recommend this program over better tools like Ophcrack and Offline NT Password & Registry Editor.
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You might also want to take a look at my list of premium Windows password recovery programs.
However, if you do have access to an account on the PC, by all means, download Cain & Abel and give it a try. It might be just what you're looking for.
Cain & Abel: Pros & Cons
This isn't my first choice for a password reset tool, as you can see.
Pros
- Password recovery tool is completely free
- Several methods can be employed to crack passwords
- Recovery of passwords is very fast, at least with my several tests
Cons
- Separate 'Rainbow Tables' must be downloaded from other sources online
- Program must be installed on the hard drive, unlike many other password recovery tools
- Must have access to another administrator account on the computer
- Variety of other built-in hacking tools might intimidate novice users
- Doesn't seem to work in Windows 10, 8, 7, or Vista
More About Cain & Abel
- Depending on the rainbow table used, Cain & Abel can recover up to 99.9% of passwords from any Windows account.
- Cain & Abel can hack many types of passwords in addition to Windows passwords (though outside the scope of this review).
- Several different methods for recovering passwords is available making this a very versatile password cracking tool.
- Works with Windows XP, Windows 2000, and Windows NT.
My Thoughts on Cain & Abel v4.9.56
Cain & Abel v4.9.56 does a great job recovering passwords — other people's passwords. If you have no way of getting into your Windows PC, you will not be able to use Cain & Abel to recover your password.
Cain & Abel finds passwords for other accounts on your computer. It cannot find the password to a single-account Windows PC since you'll need to access Windows to install Cain & Abel. Try Ophcrack or Offline NT Password & Registry Editor (both linked above) if you're in this situation. Kitab ilmu vibrasi free download.
To get started with Cain & Abel, visit their site and download the Windows NT/2000/XP version of the program. Install the program on your computer. During installation, you'll also be prompted to install WinPcap, which is fine.
Before you can use Cain & Abel, you'll need to download a rainbow table. These large databases of passwords are required so Cain & Abel can hack the password. Download one of these free XP rainbow tables then extract the files to a folder on your desktop.
Start by opening the 'Cain' program and then click the Cracker tab. On the left, click LM & LTLM Hashes and then click the big blue plus sign on the Cain toolbar. Make sure Import Hashes from local system is checked and click Next. All the user accounts will be loaded to the right.
Right-click on the username you need the password for, choose Cryptanalysis Attack > LM Hashes > via RainbowTables (OphCrack). In the LM Hashes cryptanalysis window, click the .. button and choose the folder you extracted the free rainbow tables to. Click OK and then Start.
That's it! Just wait for Cain & Abel to recover the password!
Having Problems Using Cain & Abel?
Did you have problems running Cain & Abel or did Cain & Abel not find your Windows password? Try another free Windows password recovery tool or maybe even a premium Windows password recovery tool.
Also, be sure to check out my Windows Password Recovery Programs FAQ for answers to the most common questions I get about these tools.
Cain And Abel Password
Wireless networks are accessible to anyone within the router’s transmission radius. This makes them vulnerable to attacks. Hotspots are available in public places such as airports, restaurants, parks, etc.
In this tutorial, we will introduce you to common techniques used to exploit weaknesses in wireless network security implementations. We will also look at some of the countermeasures you can put in place to protect against such attacks.
Topics covered in this tutorial
What is a wireless network?
A wireless network is a network that uses radio waves to link computers and other devices together. The implementation is done at the Layer 1 (physical layer) of the OSI model.
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How to access a wireless network?
You will need a wireless network enabled device such as a laptop, tablet, smartphones, etc. You will also need to be within the transmission radius of a wireless network access point. Most devices (if the wireless network option is turned on) will provide you with a list of available networks. If the network is not password protected, then you just have to click on connect. If it is password protected, then you will need the password to gain access.
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Wireless Network Authentication
Since the network is easily accessible to everyone with a wireless network enabled device, most networks are password protected. Let’s look at some of the most commonly used authentication techniques.
WEP
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WEP is the acronym for Wired Equivalent Privacy. It was developed for IEEE 802.11 WLAN standards. Its goal was to provide the privacy equivalent to that provided by wired networks. WEP works by encrypting the data been transmitted over the network to keep it safe from eavesdropping.
WEP Authentication
Open System Authentication (OSA) – this methods grants access to station authentication requested based on the configured access policy.
Shared Key Authentication (SKA) – This method sends to an encrypted challenge to the station requesting access. The station encrypts the challenge with its key then responds. If the encrypted challenge matches the AP value, then access is granted.
WEP Weakness
WEP has significant design flaws and vulnerabilities.
- The integrity of the packets is checked using Cyclic Redundancy Check (CRC32). CRC32 integrity check can be compromised by capturing at least two packets. The bits in the encrypted stream and the checksum can be modified by the attacker so that the packet is accepted by the authentication system. This leads to unauthorized access to the network.
- WEP uses the RC4 encryption algorithm to create stream ciphers. The stream cipher input is made up of an initial value (IV) and a secret key. The length of the initial value (IV) is 24 bits long while the secret key can either be 40 bits or 104 bits long. The total length of both the initial value and secret can either be 64 bits or 128 bits long.The lower possible value of the secret key makes it easy to crack it.
- Weak Initial values combinations do not encrypt sufficiently. This makes them vulnerable to attacks.
- WEP is based on passwords; this makes it vulnerable to dictionary attacks.
- Keys management is poorly implemented. Changing keys especially on large networks is challenging. WEP does not provide a centralized key management system.
- The Initial values can be reused
Because of these security flaws, WEP has been deprecated in favor of WPA
WPA
WPA is the acronym for Wi-Fi Protected Access. It is a security protocol developed by the Wi-Fi Alliance in response to the weaknesses found in WEP. It is used to encrypt data on 802.11 WLANs. It uses higher Initial Values 48 bits instead of the 24 bits that WEP uses. It uses temporal keys to encrypt packets.
WPA Weaknesses
- The collision avoidance implementation can be broken
- It is vulnerable to denial of service attacks
- Pre-shares keys use passphrases. Weak passphrases are vulnerable to dictionary attacks.
How to Crack Wireless Networks
WEP cracking
Cracking is the process of exploiting security weaknesses in wireless networks and gaining unauthorized access. WEP cracking refers to exploits on networks that use WEP to implement security controls. There are basically two types of cracks namely;
- Passive cracking– this type of cracking has no effect on the network traffic until the WEP security has been cracked. It is difficult to detect.
- Active cracking– this type of attack has an increased load effect on the network traffic. It is easy to detect compared to passive cracking. It is more effective compared to passive cracking.
WEP Cracking Tools
- Aircrack– network sniffer and WEP cracker. Can be downloaded from http://www.aircrack-ng.org/
- WEPCrack– this is an open source program for breaking 802.11 WEP secret keys. It is an implementation of the FMS attack. http://wepcrack.sourceforge.net/
- Kismet- this can include detector wireless networks both visible and hidden, sniffer packets and detect intrusions. http://www.kismetwireless.net/
- WebDecrypt– this tool uses active dictionary attacks to crack the WEP keys. It has its own key generator and implements packet filters. http://wepdecrypt.sourceforge.net/
WPA Cracking
WPA uses a 256 pre-shared key or passphrase for authentications. Short passphrases are vulnerable to dictionary attacks and other attacks that can be used to crack passwords. The following tools can be used to crack WPA keys.
- CowPatty– this tool is used to crack pre-shared keys (PSK) using brute force attack. http://wirelessdefence.org/Contents/coWPAttyMain.htm
- Cain & Abel– this tool can be used to decode capture files from other sniffing programs such as Wireshark. The capture files may contain WEP or WPA-PSK encoded frames. http://www.softpedia.com/get/Security/Decrypting-Decoding/Cain-and-Abel.shtml
General Attack types
- Sniffing– this involves intercepting packets as they are transmitted over a network. The captured data can then be decoded using tools such as Cain & Abel.
- Man in the Middle (MITM) Attack– this involves eavesdropping on a network and capturing sensitive information.
- Denial of Service Attack– the main intent of this attack is to deny legitimate users network resources. FataJack can be used to perform this type of attack. More on this in article
Cracking Wireless network WEP/WPA keys
It is possible to crack the WEP/WPA keys used to gain access to a wireless network. Doing so requires software and hardware resources, and patience. The success of such attacks can also depend on how active and inactive the users of the target network are.
We will provide you with basic information that can help you get started. Backtrack is a Linux-based security operating system. It is developed on top of Ubuntu. Backtrack comes with a number of security tools. Backtrack can be used to gather information, assess vulnerabilities and perform exploits among other things.
Some of the popular tools that backtrack has includes;
- Metasploit
- Wireshark
- Aircrack-ng
- NMap
- Ophcrack
Cracking wireless network keys requires patience and resources mentioned above. At a minimum, you will need the following tools
A wireless network adapter with the capability to inject packets (Hardware)
- Kali Operating System. You can download it from here https://www.kali.org/downloads/
- Be within the target network’s radius. If the users of the target network are actively using and connecting to it, then your chances of cracking it will be significantly improved.
- Sufficient knowledge of Linux based operating systems and working knowledge of Aircrack and its various scripts.
- Patience, cracking the keys may take a bit of sometime depending on a number of factors some of which may be beyond your control. Factors beyond your control include users of the target network using it actively as you sniff data packets.
How to Secure wireless networks
In minimizing wireless network attacks; an organization can adopt the following policies
- Changing default passwords that come with the hardware
- Enabling the authentication mechanism
- Access to the network can be restricted by allowing only registered MAC addresses.
- Use of strong WEP and WPA-PSK keys, a combination of symbols, number and characters reduce the chance of the keys been cracking using dictionary and brute force attacks.
- Firewall Software can also help reduce unauthorized access.
Hacking Activity: Crack Wireless Password
In this practical scenario, we are going touse Cain and Abel to decode the stored wireless network passwords in Windows. We will also provide useful information that can be used to crack the WEP and WPA keys of wireless networks.
Decoding Wireless network passwords stored in Windows
- Download Cain & Abel from the link provided above.
- Open Cain and Abel
- Ensure that the Decoders tab is selected then click on Wireless Passwords from the navigation menu on the left-hand side
- Click on the button with a plus sign
- Assuming you have connected to a secured wireless network before, you will get results similar to the ones shown below
- The decoder will show you the encryption type, SSID and the password that was used.
Summary
- Wireless network transmission waves can be seen by outsiders, this possesses many security risks.
- WEP is the acronym for Wired Equivalent Privacy. It has security flaws which make it easier to break compared to other security implementations.
- WPA is the acronym for Wi-Fi Protected Access. It has security compared to WEP
- Intrusion Detection Systems can help detect unauthorized access
- A good security policy can help protect a network.