Elcomsoft Wireless Security Auditor 5.0 12 
A single weak link poses a valid security threat to the entire corporate network. Wi-Fi networks can provide sufficient security if configured properly and accompanied by an adequate password policy. Elcomsoft Wireless Security Auditor identifies and exposes security problems in your wireless network to allow network administrators taking appropriate measures and adopting a proper password policy.
Elcomsoft Wireless Security Auditor 5.0 12
Elcomsoft Wireless Security Auditor examines the security of your wireless network by attempting to break into the network from outside or inside. Elcomsoft Wireless Security Auditor can work as a wireless sniffer or operate offline by analyzing a dump of network communications. The tool attempts to recover the original WPA/WPA2-PSK passwords in plain text.
Modern wireless networks are securely protected with WPA/WPA2. The most frequently used method of securing access to a wireless network is pre-shared passphrase, or, simply put, a text password. The WPA standard enforces the minimum length of 8 characters for all Wi-Fi passwords. Considering the relatively low performance of WPA/WPA2 password attacks, brute force attacks are rarely effective even when performed with a network of GPU-accelerated computers. In this article, I will show how to attack wireless passwords for the purpose of security audit.
Audit security of your wireless networks and recover WPA/WPA2 passwords with Elcomsoft Wireless Security Auditor. In addition to the CPU-only mode, the new wireless password recovery tool features a patented GPU acceleration technology to speed up password recovery. Elcomsoft Wireless Security Auditor targets the human factor with smart attacks, combining dictionary attacks with an advanced variation facility. The tool accepts standard tcpdump logs supported by any Wi-Fi sniffer.
ElcomSoft Wireless Security Auditor (or WSA) is an application to audit wireless network security by testing the protection of WPA/WPA2 passwords. ElcomSoft WSA uses the GPU to speed up the processing and is able to run on both NVIDIA (GeForce 8 and higher) and ATI (Radeon HD 2k and higher) graphics cards. ElcomSoft has developed its own GPU accelerated algorithm that does not use CUDA or ATI Stream. I think they exploit GPGPU principles and have coded their cracking engine using OpenGL (or Direct3D) and a lot of textures to store all data.
For a high level security environment, there are a variety of ways attacker can still exploit. WPA2-AES is still regarded as a robust encryption standard, it only applies to data frames and not currently to the management frames. Attacker tries to inject forged management frame into the network to conduct a DOS attack . Currently main wireless DOS attacks are the following: Access Point Overloaded attack, Authentication Flood Attack, De-authentication Attack, Association Flood Attack, Disassociation Attack . These attacks will lead to a wireless access point overloaded, service interruption, packets loss rate increasing, even need to restart the suspended AP.
In order to prevent unauthorized users from eavesdropping or invasive wireless network, Wired Equivalent Privacy (WEP), an IEEE standard security algorithm was proposed in 1999, But cryptanalyst has identified several weaknesses in WEP, so IEEE 802.11 standard was developed in 2003 called Wi-Fi Protected Access (WPA), and was replaced by the IEEE 802.11i standard (WPA2) in 2004 . The WEP protocol has been known to be flawed since 2000, but surprisingly it is still continuing to be used and most access points are still equipped with WEP capabilities.
In order to speed up cracking, another software uses dictionary to crack WPA and WPA2 password is Elcomsoft. Elcomsoft Wireless Security Auditor Professional (EWSA) is published by the Russian security firm Elcomsoft. The ability of this software is using the powerful graphics card parallel processing capability to crack wireless Wi-Fi network password. By offloading most runtime computation to NVIDIA/AMD GPU, overall hash cracking performance can be improved further. The cracking speed can be increased up to a hundred times compared to CPU. Fig.3 indicates that the key was successfully found.
brctl addbr mitm-bridge brctl addif mitm-bridge ethO brctl addif mitm-bridge atO ifconfig ethO 0.0.0.0 up ifconfig at0 0.0.0.0 up echo 1 >/proc/sys/net/ipv4/ip_forwar The characteristics of wireless attacks are summarized. In the WEP active cracking, The ARP request is captured and replayed into the network for thousands of times. Each replayed packet gets a response from AP encrypted with WEP. And during WPA/WPA2 cracking, a mounts of de-authentication packets are not normal. An attacker implement a MITM attacker by configuring a rouge AP which is similar to legal AP, such as SSID and MAC address. To force clients to connect to rouge AP, DOS attack will be performed, and rouge AP usually providing a stronger signal than legal one. Association or authentication flooding indicates a DOS attack. We conduct security auditing based those characteristics.
Elcomsoft Wireless Security Auditor is a tool that can help you determine the level of security of a wireless network by trying to retrieve the passwords used by users. The application supports both WPA and WPA2 security standards and can attempt to recover password from captured network data.To audit the security of your wireless network, you need to import or capture network packets. The program includes a wireless packet sniffer that can capture packets from AirPCap devices. If you do not use this type of device, you can use another packet sniffer and import data from files.
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