When using the Internet there is always the risk of running into some sort of a malware or the other, if proper security measures are not taken to keep one’s system safe. This PPT aims at providing information about the malware, Trojan Horse. It touches upon its actions and characteristics in brief and then proceeds to provide more information on its various types along with the purpose of those types of Trojans.

1. The Trojan Horse Virus

2. Table of Contents
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 Websites and Web Hosting Service
Providers
 Malware
 Trojan Horse
 Trojan’s Actions
 Common Characteristic of all Trojans
 Types of Trojan Horses
 More Types of Trojan Horses
 Some More Types of Trojan Horses
 More Types of Trojan Horses
 Conclusion

3.  Each are every website that we visit is hosted on the web server of a web hosting
company. These web hosting companies, which are also called web hosts, are
responsible for leasing server space to website owners along with providing them
the services and the technologies that are needed by a website in order to be
accessible.
 When one refers to a “Windows Hosting Company” or to a “Cloud Hosting
Company” or even to the “best Web Hosting Company” in India or even abroad,
one is essentially referring to web hosting service providers.
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Websites and Web Hosting Service Providers

4. YELLOW
 It refers to any malicious program that has been designed and installed onto a system with
the intention of harming either the computer, computer network, the server or the user of
these. Computer programs that act covertly to cause damage to data also fall in this
category. It is made up of code that is developed by cybercriminals and its aim is to cause
substantial damage to the data as well as the system that it targets. Its other aim is to
have unauthorized access to a network. Any malware is usually delivered in the form of a
file or a link that is sent over email. It requires the user to click on it, so that the malware
can be executed.
 A huge range of malware types exist. These can be computer viruses, Trojan Horses,
worms, spyware, rogue software, ransomware, adware, wiper and scareware.
 This PPT is aimed at shedding light upon the malware Trojan Horse in particular.
Malware
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5. Trojan Horse
 A Trojan Horse or a Trojan is a kind of a malware that is often found in the guise of a
legitimate software. These are used by cybercriminals to gain access to a particular
system. One of its important characteristics is, it remains in the users’ systems covertly
and does not let them find it.
 The targeted user is tricked into loading and eventually triggering the execution of
Trojans on their device. This is achieved by employing some sort of social engineering
mechanism. Once these Trojans have been installed on the user’s system these
facilitate gaining backdoor access to it for spying on the user, stealing his/her
sensitive data along with personal information. These are capable of deleting the
files of a user that are on that system as well as infecting other devices which are
connected to that network.
 Trojans are not able to self-replicate which sets these apart from computer viruses
and worms. 5

6. Trojan’s Actions
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Once Trojans are activated these can fulfil the following purposes-
 Copying data
 Deleting data
 Modifying data
 Blocking data
 Hampering the performance of computers or computer networks

7. Common Characteristic of all Trojans
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Four of the most common characteristics of every type of Trojan are mentioned
below-
 Fraudulent
 Remains concealed
 Capable of opening terminal automatically by using the communication means
of client-server model
 Can self-repair

8. Types of Trojan Horses
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Trojans are of the following types, which are mentioned in no particular order-
 Backdoor
This kind of a Trojan enables remote control over the targeted system by its sender, who has a
malicious purpose. The cybercriminal accesses the legitimate user’s system without him being aware
of it. Once a Backdoor Trojan is installed, it gives total power to the author to do everything that
he/she wishes to do on the infected device. This enables him to do everything that the actual user
can do on his system. These activities include but are not limited to reading data, sending files,
receiving, launching and deleting files along with displaying data and rebooting the computer.
This kind of a Trojan is used most frequently to form a botnet or a zombie network of the infected
computers by uniting those, so that those can be used for criminal activities.

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 Rootkit
This kind of a Trojan is meant to conceal certain objects or activities in the user’s system. Usually its
main aim is to ensure that malicious programs do not get detected. This is required to extend the
duration for which such programs can run on an infected computer.
 Exploit
It is a kind of a program that contains data or code which is used to take advantage of a
vulnerability that is within the application software which is running on the target’s computer.
 Trojan-DDoS
These programs are designed to conduct DoS (Denial of Service) attacks on a target web address. These
overwhelm the target web address by sending multiple requests from the user’s computer and several other
infected computers. This leads to a Denial of Service.

10. More Types of Trojan Horses
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 Trojan-Banker
A program of this type is used for the purpose of stealing the account data related to online banking
systems, e-payment systems and credit or debit cards of the target user, whose system is infected by it.
 Trojan-Downloader
It can download and then install new versions of Trojans and adware as well as other malicious malware
onto its target’s computer. The malware that already exists in the user’s system can be easily upgraded by
it.
 Trojan-Dropper
It is a type of Trojan that is used for the purpose of installing Trojans and or viruses. It is used to prevent the
detection of malicious programs as well. Every antivirus program is not capable of scanning all of the
components that are in this Trojan.
 Trojan-Game Thief
It is used to steal a user’s account information from online games.

11. Some More Types of Trojan Horses
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 Trojan-Fake AV
This type of a Trojan simulates the activity of an antivirus software. It is designed to extract money from the user by
giving him false information regarding the detection and removal of a cyber threat. It reports threats that do not even
exist on the user’s system.
 Trojan-IM
Trojan-IM programs are meant to steal the logins and passwords from instant messaging programs, such as Skype, MSN
Messenger, ICQ and many more.
Trojan-Ransom
This type of a Trojan is designed to modify the data on the target’s computer. This is aimed at ensuring that the target’s
computer doesn’t run correctly or is not able to use specific data any more. In this case the cybercriminal will only restore the
target computer’s performance or unblock its data, after he receives the ransom that he had demanded.
Trojan-SMS
These can cost the user money. These act by sending text messages from the target’s mobile device to premium rate phone
numbers.

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1-800-123 -8156
Whoa! That’s a big number, aren’t you proud?

13. More Types of Trojan Horses
 Trojan-Mailfinder
These are meant to harvest email addresses from the target’s system.
 Trojan-Spy
It is designed to spy on the target’s usage of his own system. It can track the data that is entered using the keyboard, take
screenshots as well as collect a list of the applications that are running on the system.

14. Conclusion
With the increase in the use of Internet, the numerous threats posed by malware are
looming large. Hence, every user of the Internet needs to be aware of the danger as
well as the damage that a malware like Trojan Horse can cause to a user’s system and
network. Every precaution must be taken to ensure proper security against malware
like Trojan Horses, if one wants to avoid any mishap and use the Internet safely and
fruitfully.

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