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Introduction to Internet Security

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People who have a lot of time on their hands and curiosity to learn more about ... Wash it CCLEANER is an option. Use a virus checker; bit defender, Kaspersky, Fprot, ... – PowerPoint PPT presentation

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Title: Introduction to Internet Security


1
Introduction toInternet Security
? Dr. Eshaa M. Alkhalifa
2
Who are Hackers?
  • People who have a lot of time on their hands and
    curiosity to learn more about computers and
    applications

3
Why do they hack?
  • Its a challenge
  • Vengeance
  • Special interest groups religious, etc.
  • Industrial espionage against rival companies
  • Warfare
  • Censorship

4
Attacks by using the web normally
  • Denial of service aimed at routers or servers
  • SPAM unsolicited email messages. Newer
    variations include instant message spam,
    newsgroup spam, search engine spam, weblogs spam
    and mobile phone spam.
  • Email Bomb overwhelming an email address such
    that it becomes unusable.
  • Spoofing To pass oneself as someone else. E.g.
    use someone elses user name and password, use
    someone elses IP address (IP spoofing) or man in
    the middle attack.

5
Phishing and Identity Theft
  • Phishing The act of masquerading or web page
    spoofing. Getting a copy of the web site in
    detail, and the using it instead of the real one
    to obtain credit card details etc by making
    people believe it is the real one.
  • Identity Theft and Stalking Using details that
    belong to someone else to gain credit or buy
    goods or services. This includes credit card
    details or bank statement details. Thieves take
    loans, or purchase good based on the identities
    of others.

6
Other ways
  • Session Hijacking Once a user starts a session
    with a server and gets the session ID, that ID is
    hijacked and the hackers computer pretends to the
    be the computer that started the session.
  • Social Engineering To obtain information from
    the person like username/password either through
    lying, tricks, or simply by reading what another
    person types on the keyboard.

7
Getting CMD rights
  • SYN Flood Flooding a server with requests, to
    make the server crash, or to execute commands on
    the server. Hacking tools called rootkits are
    the used to be installed on the computer to gain
    control.

8
Malware it includes
  • Viruses
  • Worms
  • Trojan Horses
  • Spyware

9
Viruses
  • Programs that can replicate themselves
  • They attach themselves to other programs like exe
    programs or files.
  • File infecting viruses can use macro-enabled
    documents and spread by email or removable disks
    such as flash disks.
  • The main language used to write viruses is VBA
    although others have been used to.
  • A boot virus infects the boot sector and then
    spreads out from there.

10
Worms
  • Capable of self replication but do not attach
    themselves to executable because they are self
    contained.
  • A worm has tasks built into it called payloads,
    e.g. deleting files, carrying messages, sending
    documents through email. A worm can also open
    backdoors.
  • A worm with more than one payload is known as
    being multi-headed.
  • Even simple worms can slow a system down just by
    multiplying.

11
Trojan Horses
  • Malicious piece of software that is pretending to
    be a legitimate program.
  • The user is tricked into running this program,
    which allows the program to damage the computer.
  • These programs are also used to open backdoors
    for access to the computer resources or perform
    spying functions.
  • Cross Site Scripting (XSS) placing malicious
    scripts on a trusted site zone.

12
Spyware
  • Software or hardware placed on the victims
    computer to later gather information about that
    victim without their knowledge.
  • It is broken down into two types
  • Surveillance when companies monitor their
    employees computer usage.
  • Advertising Spyware the spyware sends the
    browsing data obtained from the victims
    computers to the spyware company which then uses
    that data to display advertisements based on the
    victims preferences.

13
Ways to spy
  • Key Logging Installing an invisible software
    that records all keystrokes made by the user of
    the computer. There are hardware and software
    versions of key loggers.
  • Screen Capture
  • Trojans

14
How to take care of your device
  • Use a Defragmenter diskeeper,e.g.
  • Wash it CCLEANER is an option
  • Use a virus checker bit defender, Kaspersky,
    Fprot,..
  • Use a firewall to close open ports and control
    the system, bit defender, zone alarm.
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