With a suitable wireless adapter (many are suitable) and the correct software in a laptop, a hacker can capture the packets going to and from the router. With a hidden SSID, any device connecting to the network will broadcast the SSID in plain text to see if there is a router using that SSID within range. Part 2: Crack WiFi Password Windows in Minutes. There are lot of people searching this question on internet that 'how to hack WiFi password on Windows 10/8/7' for free, here, now, is a software for you called PassFab Wifi Key, that will be your best choice. With this free software, to hack WiFi password on laptop is no big deal. Learn multiple WiFi Hacking techniques. Create a Fake WiFi Network. Create your own wordlist. Evil Twins Attack. Handshake cracking. WiFi hacking on Windows OS. Reveal hidden SSID. Rainbow tables cracking method. Jul 12, 2017 An SSID is a network name, not — I repeat, not — a password. A wireless network has an SSID to distinguish it from other wireless networks in the vicinity. The SSID was never designed to be hidden, and therefore won’t provide your network with any kind of protection if you try to hide it. Fern Wifi Wireless Cracker. Fern Wifi Wireless Cracker is designed to crack WEP/WPA/WPA/WPA2 keys on Wi-Fi networks. It accomplishes this through a variety of different attacks including exploitation of vulnerable protocols, phishing attacks, brute-force and dictionary-based password guessing attacks.
Wireless networks are accessible to everyone within the router’s transmission radius. This makes them susceptible to attacks. Hotspots are available publicly in places like airports, restaurants, parks, etc.
In this article, we’ll introduce you to common techniques wont to exploit weaknesses in wireless network security implementations. we’ll also check out a number of the countermeasures you’ll put in situ to guard against such attacks.
What is a wireless network?
A wireless network may be a network that uses radio waves to link computers and other devices together. The implementation is completed at Layer 1 (physical layer) of the OSI model.
How to access a wireless network?
You will need a wireless network-enabled device like a laptop, tablet, smartphones, etc. you’ll also get 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 an inventory of obtainable networks. If the network isn’t password-protected, then you only need to click on connect. If it’s password-protected, then you’ll need the password to realize access.
Wireless Network Authentication:
Since the network is surely accessible to anyone with a wireless network-enabled device, most networks are password protected. Let’s check out a number of the foremost commonly used authentication techniques.
WEP:
WEP is the acronym for Wired Equivalent Privacy. it had been developed for IEEE 802.11 WLAN standards. Its goal was to supply privacy like that provided by wired networks. WEP works by encrypting the info been transmitted over the network to stay safe from eavesdropping.
Open System Authentication (OSA) – This method grants access to station authentication requested supported the configured access policy.
Shared Key Authentication (SKA) – This technique sends to an encrypted challenge to the station requesting access. The station encrypts the provocation with its key then responds. If the encrypted provocation 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 checks are often compromised by capturing a minimum of two packets. The bits within the encrypted stream and therefore the checksum are often modified by the attacker in order that the packet is accepted by the authentication system. This results in unauthorized access to the network.
- WEP uses the RC4 encryption algorithm to make stream ciphers. The stream cipher input is established from an initial value (IV) and a secret key. The extent of the initial value (IV) is 24 bits long while the key can either be 40 bits or 104 bits long. the entire length of both the initial value and secret can either be 64 bits or 128 bits long. The lower possible value of the key makes it easy to crack it.
- Weak Initial values combinations don’t encrypt sufficiently. This makes them susceptible to attacks.
- WEP is predicated on passwords; this makes it susceptible to dictionary attacks.
- Keys management is poorly implemented. Changing keys especially on large networks is challenging. WEP doesn’t provide a centralized key management system.
- The initial values are often reused.
Hack Wifi Hidden Ssid Android
Because of these security defects, WEP has been deprecated in favor of WPA
WPA:
WPA is an abbreviation for Wi-Fi Protected Access. it’s a security protocol developed by the Wi-Fi Alliance in response to the weaknesses found in WEP. it’s wont to encrypt data on 802.11 WLANs. It utilizes higher Initial Values 48 bits rather than the 24 bits that WEP uses. It uses temporal keys to encrypt packets.
WPA Weaknesses:
* The collision avoidance implementation are often broken
* it’s susceptible to denial of service attacks
* Pre-shared keys use passphrases. Weak passphrases are susceptible 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 use on networks that use WEP to implement security controls. There are basically two sorts of cracks namely;
a)Passive cracking–
This sort of cracking has no effect on the network traffic until the WEP security has been cracked. it’s difficult to detect.
b)Active cracking–
This sort of attack has an increased load effect on network traffic. it’s easy to detect compared to passive cracking. it’s simpler compared to passive cracking.
WEP Cracking Tools
a)Aircrack–
Crack Wifi Hidden Ssid File
Network sniffer and WEP cracker. are often downloaded from http://www.aircrack-ng.org/
b)WEPCrack–
This is often an open program for breaking 802.11 WEP secret keys. it’s an implementation of the FMS attack. http://wepcrack.sourceforge.net/
c)Kismet-
This will include detector wireless networks both visible and hidden, sniffer packets, and detect intrusions. https://www.kismetwireless.net/
d)WebDecrypt–
This tool uses active dictionary attacks to crack the WEP keys. it’s its own key generator and implements packet filters. http://wepdecrypt.sourceforge.net/
WPA Cracking
WPA utilizes a 256 pre-shared key or passphrase for authentications. Short passphrases are vulnerable to dictionary attacks and other attacks which will be wont to crack passwords. the following tools are often wont to crack WPA keys.
a)CowPatty–
This tool is employed to crack pre-shared keys (PSK) using a brute force attack. http://wirelessdefence.org/Contents/coWPAttyMain.html
b)Cain & Abel–
This tool is often wont to decode capture files from other sniffing programs like 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:
a)Sniffing–
This involves intercepting packets as they’re transmitted over a network. The captured data can then be decoded using tools like Cain & Abel.
b)Man within the center (MITM) Attack–
This involves eavesdropping on a network and capturing sensitive information.
c)Denial of Service Attack–
The foremost intent of this attack is to deny legitimate users network resources. FataJack is often used to perform this type of attack. More on this in article
Cracking Wireless network WEP/WPA keys
It is feasible to crack the WEP/WPA keys used to gain access to a wireless network. Doing so needs software and hardware resources, and patience. The victory 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 assist you to begin. Backtrack could also be a Linux-based security OS. it’s developed on top of Ubuntu. Backtrack comes with a sort of security tools. Backtrack is often used to gather information, assess vulnerabilities, and perform exploits among other things.
Some of the favored tools that backtrack has included;
- Metasploit
- Wireshark
- Aircrack-ng
- Nmap
- Ophcrack
- Cracking wireless network keys needs the patience and resources mentioned above. At a minimum, you will need the next tools
A wireless network adapter with the potential to inject packets (Hardware)
- Kali OS. you’ll download it from here https://www.kali.org/downloads/
- Be within the target network’s radius. If the users of the select network are actively using and connecting thereto, then your chances of cracking it’ll be significantly improved.
- Sufficient knowledge of Linux based operating systems and dealing with knowledge of Aircrack and its various scripts.
- Patience, cracking the keys may take slightly of sometimes relying on sort of things variety of which may be beyond your control. Elements 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 next policies
- Changing default passwords that accompany the hardware.
- Enabling the authentication mechanism.
- Access to the network is frequently restricted by allowing only registered MAC addresses.
- Utilize powerful WEP and WPA-PSK keys, a blend of symbols, number, and characters reduces the prospect of the keys been cracking using a dictionary and brute force attacks.
- Firewall Software can also assist reduce unauthorized access.
Hacking Activity: Crack Wireless Password
In this practical scheme, we are going to use Cain and Abel to decode the stored wireless network passwords in Windows. we’ll 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 presented above.
- Open Cain and Abel
- Confirm that the Decoders tab is chosen then click on Wireless Passwords from the navigation menu on the left-hand side.
- Click on the button with a symbol.
- Assuming you’ve connected to a secured wireless network before, you will get results almost like those shown below.
- The decoder will show you the encryption type, SSID, and thus the password that was used.
Hack Wifi Hidden Ssid
In the last article, we saw how can we enable ssh in Backtrack/Kali Linux so that we can control it remotely without physically present before the system. Also we have covered the basic networking techniques in Backtrack/Kali. Now let us move to different kinds of attacks, how it works and how can we stop it.
In this article, we will teach you how to discover SSIDs that is hidden from normal views. SSIDs (Service Set identifier) is nothing but the network name that we give during the configuration of the router or Access point. For security reasons sometimes people may hide it while configuring Access points to avoid normal people from accessing it. So let us see how can we find out such a hidden network. To find this out, we will use 3 inbuilt tools from Backtrack/Kali namely airmon-ng, airodump-ng, aireplay-ng.
First, we have to monitor the wireless card. For that we use airmon-ng. Open up a new terminal and give this command:
sudo airmon-ng
This should list all the interfaces(both wired and wireless) like on the screen shot. Now lets start monitoring by giving the command :
sudo airmon-ng start wlan0
This will begin a monitoring service normally called mon0 (check out the screen shot). Now we have to dump the information collected by this monitoring. In order to do this, we will use** airodump-ng**. Give the command :
sudo airodump-ng mon0
This will show all the SSID’s available in the network. Here, in the screen shot, I have not included any hidden SSID’s as I haven’t created any. If there are any hidden SSID’s, it will show names similar to this:
But here, let us consider ACCS-Student shown on the screen shot is hidden. You can understand from the screen shot that all of the wifi that I have used is working on channel 11. Normally it won’t be like this but here, in this special case all wifi’s are on same channel. So now lets us give the next command :
airodump-ng -c 11 mon0
This command will dump info about the SSID’s working on that specific channel. Now you can do 2 things:
You can wait till a user who knows about this hidden SSID to connect himself to that network while we are monitoring and the same will produce the SSID name on your screen. So what if, you don’t want to wait ??You can do a Deauth attack on the SSID. That will disconnect all the users who are using the network. That will force them to rejoin while we are monitoring and we will easily get the SSID. Deauth attack command is :
aireplay-ng -0 3 -a mac-address-of-hidden-SSID mon0
This will sent a Deauth notification exactly 3 times to the SSID which will result in disconnection of all users currently using it. That will make them rejoin soon and that will get our SSID. Once you get the SSID you can tell the BackTrack/Kali Linux to associate with it by giving the command (Consider the hidden SSID we found out was ACCS-Student :
iwconfig wlan0 essid ACCS-Student channel 11
NOTE:
Sending a Deauth attack may not work sometimes. It depends on so many factors. But in almost all cases it will work.
This article is for education purposes only. It is not recommended to use these attacks illegally over public networks.