Simple Replay

Simple replay is a part of Airbase suite of products. Simple-replay sniffs the IEEE 802.11 wireless packets and then replays those packets on wireless medium. Airbase is a collection of wireless utilities and libraries for crafting, parsing , injecting wireless 802.11 packets.

Simple-replay tool captures the wireless packets and can re-inject those exact packets with some user defined probability. For running simple replay, one has to specify the drivers to be used, the channel and interface on which the packets have to be captured/ injected. Simple replay also provides command line argument for saving captured and re-injected packets as standard pcap file.

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Quite frequently wireless researchers, hackers and engineers need to capture and inject wireless packets e.g. while WEP cracking. For cracking WEP key, one needs lots of weak IV (Initializing Vector) packets from AP (Access Point) or client. If attacker wants to accelerate the process of WEP cracking s/he should actively inject packets so that in response to these packets more packets will be generated and the WEP cracking process can speed up. Simple-replay does the exact thing. It acts like a catalyst in WEP cracking process.

Simple replay also provides the option for saving log files while include the packets captured and packets injected in pcap format. These files can be used in the future for forensic analysis for trouble shooting wireless issues.

Links

1. simple-replay Home Page

Amit Vartak, 27 is working in wired and wireless security fields since last 3-4 years. His current area of interest includes IEEE 802.11 (Wi-Fi) suite of protocols, vulnerabilities in these protocols and countermeasure for those vulnerabilities. Working on cutting edge tools and technology always keeps him busy. He has contributed from concept level to final prototyping for the presentations in Defcon 2007 (The Emperor Has No Cloak - WEP Cloaking Exposed) and Toorcon 2007 (Caffe latte attack). He holds 2 patents with USPTO (current status: Patent Pending) and a few papers in IEEE journals on wireless protocol vulnerabilities. Prior to this, he was working on MEMS (Micro Electro Mechanical Systems) and has published a few papers in SPIE and ICMAT. (Yeah… kindda orthogonal fields… but technology really doesn’t limit the talent :) He did his masters in Electrical Engineering from one of the premier institutes in India, Indian Institute of Technology, Bombay (IIT-Bombay) and his under graduation, from University of Mumbai in Electronics and Telecommunication Engineering. He is currently working with AirTight Networks Inc. as a team lead in technology group since last 3 years.You can get in touch with him at amitcv[at]gmail[dot]com