Transcript Lecture 17 Introduction to Hacking

Lecture 18
HACKING (CONTINUED)
WHY DO PEOPLE HACK ?
JUST FOR FUN.
SHOW OF THEIR KNOWLEDGE.
HACK OTHER SYSTEM SECRETLY.
DESTROY ENEMY’S COMPUTER NETWORK
DURING THE WAR.
FOR PROFIT PEOPLE PAYS A CRACKER.
CRACK FOR SAKE OF CURIOCITY.
THE PSYCOLOGY OF HACKERS
ALL INFORMATION SHOULD BE FREE.
ACCESS TO COMPUTER SHOULD BE
UNLIMITED AND FREE.
IT CAN CHANGE LIFE FOR BETTER.
IT CAN CREATE BEAUTY ON COMPUTER.
TYPES OF HACKING
THERE ARE MANY TYPES OF HACKING
LIKE
• PASSWORD HACKING
• SOFTWARE HACKING
• NET HACKING
PASSWORD HACKING
 TWO TYPES
1. BRUTE FORCE
• IN THAT CASE HACKERS TRY OUT ALL THE
COMBINATION OF ALL KEYBOARD LETTERS .IT HAS
GRATER SUCCESS BUT IT TAKES LONG TIME
2. DICTIONARY BASED
• IN THAT THEY ARE USE PREDEFINE PASSWORD.IT IS
UNSUCCESSFUL METHOD
SOFTWARE HACKING
IN THAT HACKERS CHANGES THE LOOK &
EXCUTION WAY OF THAT SOFTWARE
 CHANG THE DEMO VERSION INTO FULL
VERSION BY DECODING THE SOURCE CODE
IP ADDRESS
IP ADDRESS IS THE ADDRESS OF YOUR
COMPUTER IN THE INTERNET
IT IS UNIQ
LIKE 192.168.23.45
PORT
 IT IS NOT PHYSICAL PORT BUT IT IS LOGICAL PORT IN YOUR
COMPUTER
 IT IS JUST LIKE HOLE ONTO THE SYSTEM.THROUGH HACKER
CAN ENTER
 THERE ARE THOUSANDS OF PORTS INTO COMPUTER
 THE PETICULAR SERVICE IS RUNNING ON PERTICULAR PORT
 LIKE
PORT 21 : FTP
PORT 23 : TELNET
PORT 80 : HTTP
PORT 25 : MAIL
HACKING TOOLS
THERE ARE MANY TOOLS ARE AVILABLE
• SCANNERS
• TELNET
• FTP
• LAN WATCH
SCANNERS
 IT IS NOT A PHOTO SCANNER
 SCANNER IS PROGRAM THAT AUTOMATICALLY
DETECTS SECURITY WEAKNESS IN REMOTE HOST
 PORT SCANNERS ARE USED IN HACKING
 PORT SCANNER CAN GIVE THE WHOLE LIST OF OPEN
PORT ON THAT SYSTEM AND WHICH SERVICE IS
RUNNING ON THAT
 IT CAN USE ALMOST ALL OPERATING SYSTEM
 EX. SATAN,NMAP
TELNET
TELNET IS ULTIMATE HACKING TOOL
 IT IS TERMINAL EMULATION PROGRAM THAT
ALLOWS US TO CONNECT TO REMOTE SYSTEM
 YOU HAVE TO FOLLOW THIS STEP TO USE
TELNET
C:\WINDOWS\TELNET [IP ADDRESS] PORT
FTP
 FTP IS ONE TYPE OF PROTOCOL BUT SOME TIME IT IS
USED AS HACKING TOOL
 PORT 21 FOR THE FTP
 FOR CONNECTING FTP WE NEED SOME FTP S/W
KNOWN AS FTP CLIENT
 FOR CONNECTING FTP SERVER YOU HAVE TO
HAMMER THAT SERVER
 COMMAND:
C:\WINDOWS\FTP [IP ADDRESS]:PORT