This document discusses cyber extortion and ransomware. It defines ransomware as malware that locks out a user's system and demands ransom in order to regain access. The document reviews the history of ransomware, describes famous ransomware like Reveton and CryptoLocker, and explains how ransomware works. It provides tips on how to prevent ransomware attacks and instructions for removing malware from Windows PCs.

2. Contents
• What is Cyber Extortion?
• Definition of Ransomware
• History
• Types of Ransomware
• Famous Ransomwares
• How it works?
• How to avoid Ransomware?
• Removal of malwares from PC
• Conclusion
• References

3. CYBER EXTORTION
• Cyber extortion is an online crime involving an
attack or threat against an enterprise, person
with a demand for money to stop the attack.
• Cyber extortions have taken on multiple forms
encrypting data and holding it hostage,
stealing data and threatening exposure, and
denying access to data.

4. Continue…
CYBER EXTORTION
RANSOMWARE DOS ATTACK

5. RANSOMWARE DEFINED…
 Malware locks out the users system and demands
ransom.
 Creates “Zombie Computer” - operated remotely.
 Mainly business individuals are targeted.
 This form of extortion works on the assumption that
the data is important enough to the user that they are
willing to pay money for recovery.
 There is however no guarantee of actual recovery of
data , even after payment is made.

6. HISTORY
The first known ransomware was the 1989
"AIDS" trojan (also known as "PC Cyborg")
written by Joseph Popp.
later young and yung stated – 1st ransomware
is ineffective.

7. FAMOUS RANSOMWARE
 Reveton
 CryptoLocker

8. Reveton
 In 2012, a major ransomware worm known as Reveton
began to spread.
 It is also known as "police trojan".
 Its payload displays a warning from a law enforcement
agency.
 Claiming that the computer had been used for illegal
activities, such as downloading pirated software, promoting
terrorism, copyright etc.
 The warning informs the user that to unlock their system
they would have to pay a fine.
 To increase the illusion that the computer is being tracked
by law enforcement, the screen also displays the
computer's IP address and footage from a computer's
webcam.

10. CryptoLocker
 A Encrypting ransomware reappeared in 2013.
 Distributed either as an attachment to a malicious e-mail.
 Cryptolocker was also propagated using the Gameover
ZeuS.
 Encrypts certain types of files stored on local drives using
RSA public-key cryptography.
 The private key stored only on the malware's control
servers.
 Offers to decrypt the data if a payment is made by a
stated deadline.
 Threatens to delete the private key if the deadline passes.
 It was isolated in May 2014,when a Gameover botnet was
knocked out.

12. Companies affected by Ransomware
And many more….

13. HOW RANSOMWARE WORKS

14. HOW TO PREVENT BEING A VICTIM
 Keep all of the software on your computer up to
date.
 Make sure automatic updating is turned on to get
all the latest Microsoft security updates and
browser-related components (Java, Adobe, and
the like).
 Keep your firewall turned on.
 Don't open spam email messages or click links on
suspicious websites. (CryptoLocker spreads via
.zip files sent as email attachments, for example.)

15. Experts advise taking these steps to avoid attacks or
protect yourself after an attack:
Use reputable antivirus software and a firewall.
Back up often.
Exercise caution.
Disconnect from the Internet.
Alert authorities.
Update your security software.

16. REMOVAL OF MALWARES FROM
WINDOWS PC
Step 1: Enter Safe Mode
Step 2: Delete Temporary Files
Step 3: Download Malware Scanners
Step 4: Run a Scan With Malwarebytes
Step 5: Fix Your Web Browser
Step 6: Recover Your Files If Windows Is Corrupt

19. FEW BEST MALWARE REMOVAL TOOLS
 Spybot Search & Destroy (Windows, Freeware)
 SUPERAntiSpyware (Windows, $30)
 ComboFix (Windows, Freeware)
 Malwarebytes' Anti-Malware (Windows, $25)
 HijackThis (Windows, Freeware)

20. CONCLUSION
When it comes to malware attacks, knowledge is
the best possible weapon to prevent them.
Be careful what you click!!
Preventive measures should be taken before
Ransomwares establish strong hold.
Keeping all the software updated and getting
latest security updates might help to prevent the
attacks.

21. REFRENCES
 http://thehackernews.com/2015/05/ransomware-
creator.html
 http://www.spamlaws.com/how-ransomware-
works.html
 http://www.trendmicro.com/vinfo/us/security/definition
/Ransomware
 https://www.microsoft.com/security/portal/mmpc/share
d/ransomware.aspx
 http://www.trendmicro.com/vinfo/us/security/news/cyb
ercrime-and-digital-threats/crypto-ransomware-when-
encryption-breaks-bad

22. THANK YOU
QUERIES ??