AIRCRACK
Aircrack-ng is an 802.11 WEP and WPA-PSK keys cracking program that can recover keys once enough data packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK attacks, as well as the all-new PTW attack, thus making the attack much faster compared to other WEP cracking tools. In fact, Aircrack-ng is a set of tools for auditing wireless networks.
Site URL:
http://www.aircrack-ng.org/
BackTrack
BackTrack is a A Linux Distribution focused on penetration testing.
Site URL:
http://www.bactrack-linux.org
JOHN THE RIPPER
John the Ripper- free open-source software (if you want to buy you can always get the pro version)
John has been, and continues to still be, the most famous and most widely used password cracker for linux/unix systems.
Things everyone likes about it:
It's fast, it has support for cracking a lot of different but commonly used hash types, and it's able to run on just about anything.
Site URL:
http://www.openwall.com/john/
HPING
Hping is a command-line TCP/IP assembler that supports TCP, ICMP, UDP and RAW-IP protocols.
also works on Unix systems, Windows, Sun and MacOS's.
Site URL:
http://www.hping.org/
IDP
Interactive Disassembler Pro (IDP) . Supports 80x86 binaries and FLIRT, a unique Fast Library Identification and Recognition Technology that automagically recognizes standard compiler library calls. Widely used in COTS validation and hostile code analysis.
In short it's what we like to call the "Reverse Engineer's Wet Dream".
Site URL:
http://www.hex-rays.com/idapro/
WPE PRO
Winsock Packet Editor (WPE) Pro is a packet sniffing/editing tool which is generally used to hack multiplayer games. WPE Pro allows modification of data at TCP level. Using WPE Pro one can select a running process from the memory and modify the data sent by it before it reaches the destination. It can record packets from specific processes, then analyze the information. You can setup filters to modify the packets or even send them when you want in different intervals. WPE Pro could also be a useful tool for testing thick client applications or web applications which use applets to establish socket connections on non http ports.
Site URL:
http://wpepro.net/
WINHEX
Winhex is a hexadecimal editor, particularly helpful in the realm of computer forensics, data recovery, low-level data processing, and IT security. Also a advanced tool for everyday and emergency use.
Site Url
http://www.x-ways.net/winhex/
UNETBOOTIN
UNetbootin - An application to install an operating system to a flash drive or to a hard disk by either using the pre-downloaded iso file or by downloading the operating system through the application.
Site URL:
http://unetbootin.sourceforge.net/
RAINBOW CRACK
RainbowCrack is a general propose implementation of Philippe Oechslin's faster time-memory trade-off technique.
In short, the RainbowCrack tool is a hash cracker. A traditional brute force cracker try all possible plaintexts one by one in cracking time. It is time consuming to break complex password in this way. The idea of time-memory trade-off is to do all cracking time mabait in advance and store the result in files so called "rainbow table". It does take a long time to precompute the tables. But once the one time mabait is finished, a time-memory trade-off cracker can be hundreds of times faster than a brute force cracker, with the help of precomputed tables.
Site URL:
http://www.antsight.com/zsl/rainbowc
NESSUS
Nessus has been around for a little more than a little while now and has gone from free to almost free to it's gonna cost ya.
I'm not really sure regarding the newest updates as I haven't used it since it lost it's freedom, but I will say it has plugins for everything under the sun!
It is mainly used for network and server scanning and has the ability to test and create a client/server connection between yourself and the host you're testing with.
Site URL:
http://www.nessus.org/nessus/
PASSWORD FOX
PasswordFox is a small password recovery tool that allows you to view the user names and passwords stored by Mozilla Firefox Web browser. By default, PasswordFox displays the passwords stored in your current profile, but you can easily select to watch the passwords of any other Firefox profile. For each password entry, the following information is displayed: Record Index, Web Site, User Name, Password, User Name Field, Password Field, and the Signons filename. This utility works under Windows 2000, Windows XP, Windows Server 2003, and Windows Vista. Firefox should also be installed on your system in order to use this utility.
Site URL:
http://www.nirsoft.net/utils/passwor
TRUECRYPT
TrueCrypt- Free open-source disk encryption software.
Site URL:
http://www.truecrypt.org
Scapy is a packet manipulator used for crafting packets, sending packets, sniffing them etc. Also runs on Linux and Windows.
Site URL:
NEMESIS
Nemesis is a packet injector utility that is command line based and supports linux and windows.
Site URL:
http://www.packetfactory.net/projects/nemesis/
FARONICS DEEP FREEZE
Faronics Deep Freeze helps eliminate workstation damage and downtime by making computer configurations indestructible. Once Deep Freeze is installed on a workstation, any changes made to the computer—regardless of whether they are accidental or malicious—are never permanent. Deep Freeze provides immediate immunity from many of the problems that "He-Who-Must-Not-Be-Named." computers today—inevitable configuration drift, accidental system misconfiguration, malicious software activity, and incidental system degradation.
Deep Freeze ensures computers are absolutely bulletproof, even when users have full access to system software and settings. Users get to enjoy a pristine and unrestricted computing experience, while IT personnel are freed from tedious helpdesk requests, constant system maintenance, and continuous configuration drift.
Site URL:
http://www.faronics.com/html/deepfre
DBAN
DBAN- Short for Darik's Boot and Nuke, is a good utility for securely erasing contents of hard disk.
It uses encryption and re-writing over drives multiple times for a fairly secure deletion which makes if very difficult if not impossible to recover using forensics.
Site URL:
http://www.dban.org/about
CYGWIN
Cygwin is the next best thing to using Linux.
I personally do not use a windows box period, work, school, or other, unless I have Cygwin installed.
It's a large download, but once you get use to using it there's no turning back.
I have actually created a condensed copy that I carry around on my flash drive.
It comes complete with most Unix/Linux commands, to include the ability to compile things on the fly with gcc, perl, etc..
It has many useful things about it, but the only way to really see the extent of them is to use it yourself unless you like reading pages of technical data to help put you to sleep at night.
Site URL:
http://www.cygwin.com/
CAIN AND ABEL
Cain and Abel is a Windows password cracker, capable of cracking a variety of hashes, as well as arp poisoning, sniffing the network, etc.. to obtain those password hashes in the first place.
Site URL:
http://www.oxid.it/cain.html
BLOODSHED IDE
Bloodshed IDE is an Integrated Development Environment (IDE) for the C/C++ programming language.
Site URL:
http://www.bloodshed.net/devcpp.html
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