Top 10 Password Crackers

Total Page:16

File Type:pdf, Size:1020Kb

Top 10 Password Crackers Top 10 assword Crackers http://sectools.org/crackers.html Nmap Security Scanner Intro Top 0 Password Crackers Ref Guide Install Guide After the tremendously successful 2000 and 2003 security tools surveys. Insecure.0rg is delighted to release Download this 2001 survey. I 2Fyodor3 asked users from the nmap4hackers mailing list to share their favorite tools. and Changelog 3.253 people responded. This allowed me to e(pand the list to 100 tools. and even subdivide them into Book categories. This is the category page for password crackers 44 the full network security list is available here. Docs Anyone in the security field would be well advised to go over the list and investigate tools they are unfamiliar with. I discovered several powerful new tools this way. I also point newbies to this site whenever they write me Security Lists saying 7I don8t know where to start9. Nmap Hackers Nmap Dev Respondents were allowed to list open source or commercial tools on any platform. Commercial tools are noted Bugtraq as such in the list below. No votes for the Nmap Security Scanner were counted because the survey was taken Full Disclosure on a Nmap mailing list. This audience also biases the list slightly toward 7attack9 hacking tools rather than en Test defensive ones. Basics More Each tool is described by one ore more attributes: Did not appear on the 2003 list Security Tools ass crackers Generally costs money. A free limited/demo/trial version may be available. Sniffers Vuln Scanners Works natively on Linu( Web scanners Wireless Works natively on 0penBSD. FreeBSD. Solaris. and/or other UNIX variants E(ploitation Works natively on Apple Mac 0S X acket crafters More Works natively on Microsoft Windows Site News Features a command4line interface Advertising About/Contact 0ffers a GUI 2point and click3 interface Source code available for inspection. Exploit World lease send updates and suggestions 2or better tool logos3 to Fyodor. If your tool is featured or you think your Sponsors: site visitors might enjoy this list. you are welcome to use our link banners. Here is the list. starting with the most popular: #1 Cain and Abel : The top password recovery tool for Windows UNIX users often smugly assert that the best free security tools support their platform first. and Windows ports are often an afterthought. They are usually right. but Cain A Abel is a glaring e(ception. This Windows4only password recovery tool handles an enormous variety of tasks. It can recover passwords by sniffing the network. cracking encrypted passwords using Dictionary. Brute4Force and Cryptanalysis attacks. recording VoI conversations. decoding scrambled passwords. revealing password bo(es. uncovering cached passwords and analyBing routing protocols. It is also well documented. Also categoriBed as: packet sniffers #2 Cohn the Ripper : A powerful. fle(ible. and fast multi4platform password hash cracker Cohn the Ripper is a fast password cracker. currently available for many flavors of Uni( 211 are officially supported. not counting different architectures3. D0S. Win32. Be0S. and 0penVMS. Its primary purpose is to detect weak Uni( passwords. It supports several crypt233 password hash types which are most commonly found on various Uni( flavors. as well as Derberos AFS and Windows NT/2000/X LM hashes. Several other hash types are added with contributed patches. Eou will want to start with some wordlists. which you can find here. here. or here. 1 de 3 25/8/2011 08:59 Top 10 assword Crackers http://sectools.org/crackers.html #3 THC Hydra : A Fast network authentication cracker which supports many different services When you need to brute force crack a remote authentication service. Hydra is often the tool of choice. It can perform rapid dictionary attacks against more then 30 protocols. including telnet. ftp. http. https. smb. several databases. and much more. Like THC Amap this release is from the fine folks at THC. #5 Aircrack : The fastest available WE /W A cracking tool Aircrack is a suite of tools for 802.11a/b/g WE and W A cracking. It can recover a 50 through 5124bit WE key once enough encrypted packets have been gathered. It can also attack W A 1 or 2 networks using advanced cryptographic methods or by brute force. The suite includes airodump 2an 802.11 packet capture program3. aireplay 2an 802.11 packet injection program3. aircrack 2static WE and W A4 SD cracking3. and airdecap 2decrypts WE /W A capture files3. Also categoriBed as: wireless tools #5 L0phtcrack : Windows password auditing and recovery application L0phtCrack attempts to crack Windows passwords from hashes which it can obtain 2given proper access3 from stand4alone Windows workstations. networked servers. primary domain controllers. or Active Directory. In some cases it can sniff the hashes off the wire. It also has numerous methods of generating password guesses 2dictionary. brute force. etc3. LC5 was discontinued by Symantec in 2001. then re4acquired by the original L0pht guys and reborn as LC1 in 2009. For free alternatives. consider 0phcrack. Cain and Abel. or Cohn the Ripper. #1 Airsnort : 802.11 WE Encryption Cracking Tool AirSnort is a wireless LAN 2WLAN3 tool that recovers encryption keys. It was developed by the Shmoo Group and operates by passively monitoring transmissions. computing the encryption key when enough packets have been gathered. Eou may also be interested in the similar Aircrack. Also categoriBed as: wireless tools #I SolarWinds : A plethora of network discovery/monitoring/attack tools SolarWinds has created and sells doBens of special4purpose tools targeted at systems administrators. Security4related tools include many network discovery scanners. an SNM brute4force cracker. router password decryption. a TC connection reset program. one of the fastest and easiest router config download/upload applications available and more. Also categoriBed as: traffic monitoring tools #8 wdump : A window password recovery tool wdump is able to e(tract NTLM and LanMan hashes from a Windows target. regardless of whether Syskey is enabled. It is also capable of displaying password histories if they are available. It outputs the data in L0phtcrack4compatible form. and can write to an output file. #9 RainbowCrack : An Innovative assword Hash Cracker The RainbowCrack tool is a hash cracker that makes use of a large4scale time4memory trade4off. A traditional brute force cracker tries all possible plainte(ts one by one. which can be time consuming for comple( passwords. RainbowCrack uses a time4memory trade4off to do all the cracking4time computation in advance and store the results in so4called Jrainbow tablesJ. It does take a long time to precompute the tables but RainbowCrack can be hundreds of times faster than a brute force cracker once the precomputation is finished. 2 de 3 25/8/2011 08:59 Top 10 assword Crackers http://sectools.org/crackers.html #10 Brutus : A network brute4force authentication cracker This Windows4only cracker bangs against network services of remote systems trying to guess passwords by using a dictionary and permutations thereof. It supports HTT . 0 3. FT . SMB. TELNET. IMA . NT . and more. No source code is available. UNIX users should take a look at THC Hydra. Show All Top 100 Network Security Tools 0r view by category: Application4Specific Scanners K assword Crackers K Encryption Tools K Disassemblers K Firewalls K Intrusion Detection Systems K Netcats K 0S Detection Tools K acket Crafting Tools K ort Scanners K Rootkit Detectors K Security40riented 0perating Systems K acket Sniffers K Vulnerability E(ploitation Tools K Traceroute Tools K Traffic Monitoring Tools K Vulnerability Scanners K Web Vulnerability Scanners K Wireless Tools L Nmap K Sec Tools K Mailing Lists K Site News K About/Contact K Advertising K rivacy M 3 de 3 25/8/2011 08:59.
Recommended publications
  • Analysis of Password Cracking Methods & Applications
    The University of Akron IdeaExchange@UAkron The Dr. Gary B. and Pamela S. Williams Honors Honors Research Projects College Spring 2015 Analysis of Password Cracking Methods & Applications John A. Chester The University Of Akron, [email protected] Please take a moment to share how this work helps you through this survey. Your feedback will be important as we plan further development of our repository. Follow this and additional works at: http://ideaexchange.uakron.edu/honors_research_projects Part of the Information Security Commons Recommended Citation Chester, John A., "Analysis of Password Cracking Methods & Applications" (2015). Honors Research Projects. 7. http://ideaexchange.uakron.edu/honors_research_projects/7 This Honors Research Project is brought to you for free and open access by The Dr. Gary B. and Pamela S. Williams Honors College at IdeaExchange@UAkron, the institutional repository of The nivU ersity of Akron in Akron, Ohio, USA. It has been accepted for inclusion in Honors Research Projects by an authorized administrator of IdeaExchange@UAkron. For more information, please contact [email protected], [email protected]. Analysis of Password Cracking Methods & Applications John A. Chester The University of Akron Abstract -- This project examines the nature of password cracking and modern applications. Several applications for different platforms are studied. Different methods of cracking are explained, including dictionary attack, brute force, and rainbow tables. Password cracking across different mediums is examined. Hashing and how it affects password cracking is discussed. An implementation of two hash-based password cracking algorithms is developed, along with experimental results of their efficiency. I. Introduction Password cracking is the process of either guessing or recovering a password from stored locations or from a data transmission system [1].
    [Show full text]
  • Cryptanalytic Tools
    Cryptanalytic Tools Authors: Prof. Dr.-Ing. Tim Güneysu Dipl. Ing. Alexander Wild B. Sc. Tobias Schneider Ruhr-Universität Bochum Module Cryptanalytic Tools Chapter 3: Introduction to Cryptanalysis Chapter 4: Computational Complexity and Parallelism Chapter 5: Secret Parameters and Keys Chapter 6: Tools for Symmetric Cryptanalysis Chapter 7: Tools for Asymmetric Cryptanalysis Authors: Prof. Dr.-Ing. Tim Güneysu Dipl. Ing. Alexander Wild B. Sc. Tobias Schneider 1. edition Ruhr-Universität Bochum © 2015 Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum 1. edition (31. March 2015) Das Werk einschließlich seiner Teile ist urheberrechtlich geschützt. Jede Ver- wendung außerhalb der engen Grenzen des Urheberrechtsgesetzes ist ohne Zustimmung der Verfasser unzulässig und strafbar. Das gilt insbesondere für Vervielfältigungen, Übersetzungen, Mikroverfilmungen und die Einspe- icherung und Verarbeitung in elektronischen Systemen. Um die Lesbarkeit zu vereinfachen, wird auf die zusätzliche Formulierung der weiblichen Form bei Personenbezeichnungen verzichtet. Wir weisen deshalb darauf hin, dass die Verwendung der männlichen Form explizit als geschlechtsunabhängig verstanden werden soll. Das diesem Bericht zugrundeliegende Vorhaben wurde mit Mitteln des Bundesministeriums für Bildung, und Forschung unter dem Förderkennze- ichen 16OH12026 gefördert. Die Verantwortung für den Inhalt dieser Veröf- fentlichung liegt beim Autor. Contents Page3 Contents Introduction to the module books 5 I. Icons and colour codes . 5 Chapter 3 Introduction to Cryptanalysis 7 3.1 Definition of Security . 7 3.1.1 Security of Cryptographic Systems . 7 3.1.2 Categories of Attacks . 8 3.1.3 Categories of Attackers . 9 3.1.4 Secret Key Lengths . 10 3.2 Outline of this Lecture . 11 3.3 Further Reading Materials . 11 Chapter 4 Computational Complexity and Parallelism 13 4.1 Asymptotic Computational Complexity .
    [Show full text]
  • Password Attacks and Generation Strategies
    PASSWORD ATTACKS AND GENERATION STRATEGIES Predrag Tasevski Tartu University, Faculty of Mathematics and Computer Sciences, major: Master of Science in Cyber Security May 21, 2011 Table of contents Introduction Methods Ad-hoc models Brute force Rainbow tables Examples and tools Comparison of input dictionary list Test Conclusion INTRODUCTION Password is a secret word or string of characters that is used for authentication in order to prove identity or gain access to a resource[Gill(1997)]. I Usage of password cracking tools I Methods and approaches guessing the passwords I Examples of leaks and generating password dictionaries I Comparison of already cracked passwords from available password dictionaries and I Test METHODS Password cracking is a method of guessing the attack. Types of password cracking methods[Vines(2007)]: I Dictionary I Hybrid I Brute force Ad-hoc models Dictionary attacks - colander rules Example Capitalization the rst letter, adding three digits to the end, changing the letter `a' to `@' etc. Hybrid it adds simple numbers or symbols to the password attempt. Brute force Brute force are fraction of the total words that are made by users creating their passwords. Brute force attacks methods: I Pure brute force [Group(2010)] I Letter frequency analysis attack [Stitson(2003)] I Markov models [Shmatikov Arvind(2005)] I Targeted brute force attacks [WEIR(2010b)] Rainbow tables (1) Rainbow tables are using the reduction functions to create multiple parallel chains within a single "rainbow" table. I Increases the probability of a correct crack for a given table size, the use of multiple reduction functions also greatly increases the speed of look-ups [JeXChen(2011)].
    [Show full text]
  • How to Handle Rainbow Tables with External Memory
    How to Handle Rainbow Tables with External Memory Gildas Avoine1;2;5, Xavier Carpent3, Barbara Kordy1;5, and Florent Tardif4;5 1 INSA Rennes, France 2 Institut Universitaire de France, France 3 University of California, Irvine, USA 4 University of Rennes 1, France 5 IRISA, UMR 6074, France [email protected] Abstract. A cryptanalytic time-memory trade-off is a technique that aims to reduce the time needed to perform an exhaustive search. Such a technique requires large-scale precomputation that is performed once for all and whose result is stored in a fast-access internal memory. When the considered cryptographic problem is overwhelmingly-sized, using an ex- ternal memory is eventually needed, though. In this paper, we consider the rainbow tables { the most widely spread version of time-memory trade-offs. The objective of our work is to analyze the relevance of storing the precomputed data on an external memory (SSD and HDD) possibly mingled with an internal one (RAM). We provide an analytical evalua- tion of the performance, followed by an experimental validation, and we state that using SSD or HDD is fully suited to practical cases, which are identified. Keywords: time memory trade-off, rainbow tables, external memory 1 Introduction A cryptanalytic time-memory trade-off (TMTO) is a technique introduced by Martin Hellman in 1980 [14] to reduce the time needed to perform an exhaustive search. The key-point of the technique resides in the precomputation of tables that are then used to speed up the attack itself. Given that the precomputation phase is much more expensive than an exhaustive search, a TMTO makes sense in a few scenarios, e.g., when the adversary has plenty of time for preparing the attack while she has a very little time to perform it, the adversary must repeat the attack many times, or the adversary is not powerful enough to carry out an exhaustive search but she can download precomputed tables.
    [Show full text]
  • Cracking Passwords Guide
    Cracking Passwords Version 1.1 file:///D:/password10.html Cracking Passwords Version 1.1 by: J. Dravet February 15, 2010 Abstract This document is for people who want to learn to the how and why of password cracking. There is a lot of information being presented and you should READ IT ALL BEFORE you attempted doing anything documented here. I do my best to provide step by step instructions along with the reasons for doing it this way. Other times I will point to a particular website where you find the information. In those cases someone else has done what I attempting and did a good or great job and I did not want to steal their hard work. These instructions have several excerpts from a combination of posts from pureh@te, granger53, irongeek, PrairieFire, RaginRob, stasik, and Solar Designer. I would also like to thank each of them and others for the help they have provided me on the BackTrack forum. I will cover both getting the SAM from inside windows and from the BackTrack CD, DVD, or USB flash drive. The SAM is the Security Accounts Manager database where local usernames and passwords are stored. For legal purposes I am using my own system for this article. The first step is to get a copy of pwdump. You can choose one from http://en.wikipedia.org/wiki/Pwdump . Update: I used to use pwdump7 to dump my passwords, however I have come across a new utility called fgdump from http://www.foofus.net/fizzgig/fgdump/ This new utility will dump passwords from clients and Active Directory (Windows 2000 and 2003 for sure, not sure about Windows 2008) where pwdump7 only dumps client passwords.
    [Show full text]
  • Lab 7: Breaking Windows Passwords
    ETHICAL HACKING LAB SERIES Lab 7: Breaking Windows Passwords Certified Ethical Hacking Domain: System Hacking Document Version: 2015-08-14 This work by the National Information Security and Geospatial Technologies Consortium (NISGTC), and except where otherwise noted, is licensed under the Creative Commons Attribution 3.0 Unported License. Development was funded by the Department of Labor (DOL) Trade Adjustment Assistance Community College and Career Training (TAACCCT) Grant No. TC-22525-11-60-A-48; The National Information Security, Geospatial Technologies Consortium (NISGTC) is an entity of Collin College of Texas, Bellevue College of Washington, Bunker Hill Community College of Massachusetts, Del Mar College of Texas, Moraine Valley Community College of Illinois, Rio Salado College of Arizona, and Salt Lake Community College of Utah. This workforce solution was funded by a grant awarded by the U.S. Department of Labor's Employment and Training Administration. The solution was created by the grantee and does not necessarily reflect the official position of the U.S. Department of Labor. The Department of Labor makes no guarantees, warranties or assurances of any kind, express or implied, with respect to such information, including any information on linked sites, and including, but not limited to accuracy of the information or its completeness, timeliness, usefulness, adequacy, continued availability or ownership. Lab 7: Breaking Windows Passwords Contents Introduction .......................................................................................................................
    [Show full text]
  • Recover Various Password Hashes by Using Cryptanalysis Technique
    International Journal of Latest Trends in Engineering and Technology (IJLTET) Recover Various Password hashes By Using Cryptanalysis Technique Shailendra Nigam Computer Science & Engineering Department DIET, Kharar Mohali(Punjab) India. Bhanu Sharma Computer Science & Engineering Department BBSBEC, Fatehgarh sahib(Punjab) India Abstract - This paper is based on literature survey and thoughts. Recover various password hashes by using cryptanalysis technique is used for analyzing the hidden information of the system. This technique is based on rainbow table that are used to retrieve the passwords. Rainbow table is an application of Martin Hellman Algorithm. Diffie-Hellman key exchange (D-H) is a specific method of exchanging cryptographic keys. It is one of the earliest practical examples of key exchange implemented with in the field of cryptography. The aim of this work is to recover the password hashes in plain text format using cryptanalysis attack. Keywords:- Hellman Algorithm, Rainbow table, Recover password , Hashes I. INTRODUCTION Recover Various Password hashes By Using Cryptanalysis Technique is based on the rainbow table and recovery software tool. Rainbow table usually for a cracking password hashes. In this tables are used in recovering the text password but limited set of characters. Rainbow table solve the collisions problem with the help of ordinary hash chain. Rainbow tables are an application of an earlier, simpler algorithm by Martin Hellman. Recover Various Password hashes By Using Cryptanalysis Technique strategy which option strategy to use is one of the most difficult decisions for an option trader. Some recovery software are available in the market but based on the brute force, dictionary attacks and other technique but I will use the cryptanalysis technique because this technique is based on the rainbow table and provide the information about the password in the plain text format.
    [Show full text]
  • Rainbow Tables & Rainbowcrack Introduction
    Learn Security Online, Inc. © https://www.learnsecurityonline.com/ Rainbow Tables & RainbowCrack Introduction Rainbow tables reduce the difficulty in brute force cracking a single password by creating a large pre-generated data set of hashes from nearly every possible password. Rainbow Tables and RainbowCrack come from the work and subsequent paper by Philippe Oechslin.1 The method, known as the Faster Time-Memory Trade-Off Technique, is based on research by Martin Hellman & Ronald Rivest done in the early 1980’s on the performance trade-offs between processing time and the memory needed for cryptanalysis. In his paper published in 2003, Oechslin refined the techniques and showed that the attack could reduce the time to attack 99.9%of Microsoft's LAN Manager passwords (alpha characters only) to 13.6 seconds from 101 seconds. Further algorithm refinements also reduced the number of false positives produced by the system. The main benefit of Rainbow Tables is that while the actual creation of the rainbow tables takes much more time than cracking a single hash, after they are generated you can use the tables over and over again. Additionally, once you have generated the Rainbow Tables, RainbowCrack is faster than brute force attacks and needs less memory than full dictionary attacks. Rainbow Tables are popular with a particularly weak password algorithm known as Microsoft LM hash. LM stands for LAN Manager, this password algorithm was used in earlier days of Windows and still lives on only for compatibility reasons. By default Windows XP or even Windows Server 2003 keeps the LM hash of your passwords in addition to a more secure hash (NTLM or NTLMv2).
    [Show full text]
  • Rainbow Tables EXPLAINED
    Rainbow Tables EXPLAINED By: Warpboy CopyRight 2006 - Forever Warpboy www.securitydb.org SDB www.securitydb.org Table of Contents 0x01: Defining Rainbow Tables 0x02: Time-Memory Trade-Off 0x03: Setting Up Software 0x04: Generating Rainbow Tables 0x05: Cracking Hashes 0x06: The End 0x07: Shoutz / Contact Info Total Pages: 11 0x01 SDB www.securitydb.org Defining Rainbow Tables So what exactly are rainbow tables? Rainbow tables are the new generation of cracking, using advanced developed methods for cracking passwords encrypted with algorithms such as the Message Digest 5 (MD5) or LanManager (LM). Rainbow tables have become more popular and more widely known for the speed at which passwords encrypted with these algorithms can be cracked. It is vital to stay up-to-date with technology; therefore, this paper will teach you all about rainbow tables and how they are being used and applied in todays world. A rainbow table is a special type of lookup table offering a time-memory tradeoff used in recovering the plaintext password from a ciphertext generated by a one-way hash. Translation? A rainbow table is a lookup table, such as you lookup a word in a text file, but a little more complicated. Rainbow tables use time-memory trade-off (explained later) to decrease the amount of time to crack a ciphertext (encrypted word) into a plaintext. The algorithms md5 and lm are one way, meaning they cannot be decrypted, but they can be looked up. Time-Memory Trade-Off 0x02 The traditional way to crack passwords is brute forcing, which would simply just try all the plaintexts one by one.
    [Show full text]
  • Cracking Passwords Guide
    Contents 1 LM vs. NTLM 2 Syskey 3 Cracking Windows Passwords 3.1 Extracting the hashes from the Windows SAM 3.1.1 Using Kali Tools 3.1.1.1 Using bkhive and samdump v1.1.1 (BT2 and BT3) 3.1.1.2 Using samdump2 v2.0.1 (BT4) 3.1.1.3 Cached Credentials 3.1.2 Using Windows Tools 3.1.2.1 Using fgdump 3.1.2.2 Using gsecdump 3.1.2.3 Using pwdump7 3.1.2.4 Cached Credentials 3.2 Extracting the hashes from the Windows SAMremotely 3.2.1 Using Kali Tools 3.2.1.1 ettercap 3.2.2 Using Windows Tools 3.2.2.1 Using fgdump 3.3 Cracking Windows Passwords 3.3.1 Using Kali Tools 3.3.1.1 John the Ripper BT3 and BT4 3.3.1.1.1 Cracking the LM hash 3.3.1.1.2 Cracking the NTLM hash 3.3.1.1.3 Cracking the NTLM using the cracked LM hash 3.3.1.1.4 Cracking cached credentials 3.3.1.2 John the Ripper - current 3.3.1.2.1 Get and Compile 3.3.1.2.2 Cracking the LM hash 3.3.1.2.3 Cracking the LM hash using known letter(s) in known location(s) (knownforce) 3.3.1.2.4 Cracking the NTLM hash 3.3.1.2.5 Cracking the NTLM hash using the cracked LM hash (dumbforce) 3.3.1.2.6 Cracking cached credentials 3.3.1.3 Using MDCrack 3.3.1.3.1 Cracking the LM hash 3.3.1.3.2 Cracking the NTLM hash 3.3.1.3.3 Cracking the NTLM hash using the cracked LM hash 3.3.1.4 Using Ophcrack 3.3.1.4.1 Cracking the LM hash 3.3.1.4.2 Cracking the NTLM hash 3.3.1.4.3 Cracking the NTLM hash using the cracked LM hash 3.3.2 Using Windows Tools 3.3.2.1 John the Ripper 3.3.2.1.1 Cracking the LM hash 3.3.2.1.2 Cracking the NTLM hash 3.3.2.1.3 Cracking the NTLM hash using the cracked LM hash 3.3.2.1.4 Cracking cached credentials 3.3.2.2 Using MDCrack 3.3.2.2.1 Cracking the LM hash 3.3.2.2.2 Cracking the NTLM hash 3.3.2.2.3 Cracking the NTLM hash using the cracked LM hash 3.3.2.3 Using Ophcrack 3.3.2.3.1 Cracking the LM hash 3.3.2.3.2 Cracking the NTLM hash 3.3.2.3.3 Cracking the NTLM hash using the cracked LM hash 3.3.2.4 Using Cain and Abel 3.3.3 Using a Live CD 3.3.3.1 Ophcrack 4.
    [Show full text]
  • Nails in the Crypt(3)
    2010 Intrepidus Group, Inc. By David Schuetz Senior Consultant NAILS IN THE CRYPT(3) Abstract: Admit it, password cracking is fun. And the only thing more fun than breaking a single root password is breaking a whole file of passwords, most of which are for administrators. Unfortunately, even with modern systems, brute forcing an entire large file remains terribly slow. So some years back, folks came up with the idea of rainbow tables, and suddenly fast attacks on an entire user base became possible. But for some reason, nobody's ever extended rainbow tables to support old-school UNIX crypt(3) passwords. Maybe it was just processor speed. Or maybe it was disk space. Or maybe it was statements like "You'd need a full set of rainbow tables for each salt." But nobody's done it, at least not openly. This paper outlines a simple method to do just that, extending rainbow tables backwards into crypt(3) territory. Nails in the Crypt(3) December 21, 2010 Introduction Password cracking can be a powerful tool, both for auditing and penetration testing. However, password cracking can also be slow. Trying to crack an entire database of hundreds or thousands (or hundreds of thousands) of hashes can be very, very slow. So the obvious solution is to simply store the results of your password crack attacks for future use – eventually building up a huge database of password hashes. Once you do that, all future cracking sessions will be NEARLY INSTANTANEOUS! Win! Thereʼs just one drawback. An eight-character password, taken only from letters and numbers (A-Z, a-z, 0-9), comes from a key space of (26 + 26 + 10)^8, or 62^8 possible passwords.
    [Show full text]
  • High Performance Password Cracking by Implementing Rainbow Tables on Nvidia Graphics Cards (Isecrack) Russell Edward Graves Iowa State University
    Iowa State University Capstones, Theses and Graduate Theses and Dissertations Dissertations 2008 High performance password cracking by implementing rainbow tables on nVidia graphics cards (IseCrack) Russell Edward Graves Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/etd Part of the Electrical and Computer Engineering Commons Recommended Citation Graves, Russell Edward, "High performance password cracking by implementing rainbow tables on nVidia graphics cards (IseCrack)" (2008). Graduate Theses and Dissertations. 11841. https://lib.dr.iastate.edu/etd/11841 This Thesis is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Graduate Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. High performance password cracking by implementing rainbow tables on nVidia graphics cards (IseCrack) by Russell Edward Graves A thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Co-majors: Information Assurance, Computer Engineering Program of Study Committee: Doug Jacobson, Major Professor Thomas Daniels Cliff Bergman Iowa State University Ames, Iowa 2008 Copyright © Russell Edward Graves, 2008. All rights reserved. ii Table of Contents Abstract...........................................................................................................................................
    [Show full text]