exploit: password cracking
DESCRIPTION
Exploit: Password Cracking. An Overview on Password Cracking. Password cracking is a term used to describe the penetration of a network, system, or resource with or without the use of tools to unlock a resource that has been secured with a password. Introduction. - PowerPoint PPT PresentationTRANSCRIPT
Exploit: Password Cracking
An Overview on Password Cracking
Password cracking is a term used to describe the penetration of a network, system, or resource with or without the use of tools to unlock a resource that has been secured with a password
Introduction
System vulnerabilities with passwords Strong passwords Vs Weak
Examples of vulnerabilities Applications
FTP, HTTP, Telnet Password Cracking Tools
Tools in Common Brutus Password Cracker
Experiment on Password Cracking Platform : Windows. Setting up of machines with
services Target Machine (Server) Client
Setting up of Machines
DHCP/Switch
Client FTP-Serv-U Brutus Ethereal. 192.168.1.3 (Word List) 192.168.1.2 (Word List) 192.168.0.172 (BruteForce) 192.168.0.125(BruteForce)
About Brutus Password Cracker: Supported Applications
Telnet, FTP, HTTP Methods used to engage with
Remote machine Word List Combo BruteForce
A Quick Look On Brutus Password Cracker
Engaging Remote Machine Using “Word List”The Method:
- Creates many number of combinations of Possible System passwords from two separate files“users” and “word”.
- Engages remote machine
enter word after word, at high speed, until a match is found.
Engaging Remote Machine using “Word List”
Sample Entries for File “users”statlerwaldorfadminadministrator
Sample Entries for File “word”aaaabc123academiaacademic
Engaging Remote FTP Server Using “Word List”
“Word List”: A Failed attempt
Sample Trace for the Method - “Word List”
Engaging Remote Server using “Combo” The Method:
- Similar to “Word List”- Uses “combo” file to generate
combinations passwords for each users of the remote system.
- Uncertain; Needs more guessing
Sample “combo” file Entries admin:admin1 admin:admin12 admin:admin123
Engaging Remote Server using “BruteForce”The Method:
- Guaranteed to some extent- Relies purely on power and repetition - Need very high processing speed- Produces many number of passwords for a particular user using permutations and combinations- May take months years to crack the password
Examples of Generated passwords: aaa, aab, aac... aaA, aaB, aaC...
aa0, aa1, aa2, aa3... aba, aca, ada..
Each of the combinations of characters and symbols is fed through the appropriate cryptographic algorithm and compared to the stored password until a match is found.
Engaging Remote Machine Using “BruteForce”
A sample display on initial settings just before engaging.
Engaging Remote Machine Using “BruteForce”
A sample display on initial settings just before engaging.
Engaging Remote Machine Using “BruteForce”Sample display on cracked password
Questions? Comments?