A computer virus is a program that can spread across computers without the user's knowledge by copying itself. Viruses can harm computers by deleting files or displaying irritating messages. There are different types of viruses like boot sector viruses, file viruses, macro viruses, worms, and trojans. Email attachments are a common way viruses spread between computers. While visiting websites poses less risk than opening unknown files, malware like backdoor trojans accessed through websites can still infect computers.
OBJECTIVES
Introduction
What Is Virus?
Why Virus Are Called “Virus”?
How Do Virus Spread?
Virus Operation
How Virus work?
Common Virus Entry Points
Symptoms Of Virus Attack
Types of Computer Virus
Techniques used by Viruses
Anti-Virus Software
Methods used by Antivirus Software
Actions to Prevent Virus Infection
Conclusion
A virus program is usually able to replicate itself and this too is an
added problem once the virus latches on to a system. Progressively
getting out of control, the virus will attempt to cause as much damage
as possible before it can be detected and eliminated. The replication is
usually intentional and designed to act just like a Trojan, thus causing
the unsuspecting user being caught off guard. If a file that contains a
virus is opened, or copied onto another computer, then the other
computer will also become infected and this process is repeated every
time the file is opened and downloaded onto other systems.
A virus can easily be introduced into a computer system along with
any software program and this is bad news for the users of FTP
otherwise referred to as file transfer protocol. The viruses can also
become a problem when there is referencing done and email
attachments are being used. When the virus enters the computer
system, it can attach itself to, or even replace an existing program.
This of course is not good for the user, who will ultimately open the
attachment or file and cause the virus to be activated.
Computer Viruses, a portion of a computer program that has been designed to furtively copy itself into other similar canons or computer codes. It's generally created by a prankster or defacer to effect a non-utilitarian result or to destroy data and program , in the case of ransomware.
OBJECTIVES
Introduction
What Is Virus?
Why Virus Are Called “Virus”?
How Do Virus Spread?
Virus Operation
How Virus work?
Common Virus Entry Points
Symptoms Of Virus Attack
Types of Computer Virus
Techniques used by Viruses
Anti-Virus Software
Methods used by Antivirus Software
Actions to Prevent Virus Infection
Conclusion
A virus program is usually able to replicate itself and this too is an
added problem once the virus latches on to a system. Progressively
getting out of control, the virus will attempt to cause as much damage
as possible before it can be detected and eliminated. The replication is
usually intentional and designed to act just like a Trojan, thus causing
the unsuspecting user being caught off guard. If a file that contains a
virus is opened, or copied onto another computer, then the other
computer will also become infected and this process is repeated every
time the file is opened and downloaded onto other systems.
A virus can easily be introduced into a computer system along with
any software program and this is bad news for the users of FTP
otherwise referred to as file transfer protocol. The viruses can also
become a problem when there is referencing done and email
attachments are being used. When the virus enters the computer
system, it can attach itself to, or even replace an existing program.
This of course is not good for the user, who will ultimately open the
attachment or file and cause the virus to be activated.
Computer Viruses, a portion of a computer program that has been designed to furtively copy itself into other similar canons or computer codes. It's generally created by a prankster or defacer to effect a non-utilitarian result or to destroy data and program , in the case of ransomware.
What is malware? How can I protect myself against malware on my computer? Helpful tips and information about computer Viruses, Worms, Trojans, Ransomware, Scareware, Spyware, Adware and Phishing mails.
In this era of modern technology, computers play a very important role in our
daily lives. Computers play its functions in private homes, offices, workspaces, hospitals,
schools, and everywhere else. It is undeniable that computers are very important
nowadays but of course, no matter how great the technology is, there will still be some
flaws and problems. The existence of computer viruses revolutionized the way the
computer works and what type of security measures are supposed to be taken to prevent
this serious problem.
What is malware? How can I protect myself against malware on my computer? Helpful tips and information about computer Viruses, Worms, Trojans, Ransomware, Scareware, Spyware, Adware and Phishing mails.
In this era of modern technology, computers play a very important role in our
daily lives. Computers play its functions in private homes, offices, workspaces, hospitals,
schools, and everywhere else. It is undeniable that computers are very important
nowadays but of course, no matter how great the technology is, there will still be some
flaws and problems. The existence of computer viruses revolutionized the way the
computer works and what type of security measures are supposed to be taken to prevent
this serious problem.
The virus then spreads through the software or document that it is connected to via drives, networks, file-sharing applications, or virus-infected attachments to emails.
Read how to turn off malwarebytes notifications
The primary difference between a virus and a worm is that viruses must be triggered by the activation of their host; whereas worms are stand-alone malicious programs that can self-replicate and propagate independently as soon as they have breached the system.
1. What is a computer security risk?
2. Virus
3. Trojan Horse
4. Worms
5. Stand-Alone Utility Programs
6. How can a virus spread through an e-mail message?
7. How does an antivirus program inoculate a program file
?
8. What is a firewall?
.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
1. COMPUTER VIRUS
By: Abd Rashid Bin Hj Shafie
Penyelaras Bestari
SMK Gunung Rapat, Ipoh
A computer virus is a computer program that can spread across computers and networks
by making copies of itself, usually without the user’s knowledge. Viruses can have
harmful side-effects. These can range from displaying irritating messages to deleting all
the files on your computer.
How does a virus infect computers?
A virus program has to be run before it can infect your computer. Viruses have ways of
making sure that this happens. They can attach themselves to other programs and as soon
as you launch the infected program, the virus code runs. You might receive an infected
file on a disk, in an email attachment, or in a download from the internet. You might
receive an infected file on a disk, in an email attachment, or in a download from the
internet. As soon as you launch the file, the virus code runs. Then the virus can copy
itself to other files or disks and make changes on your computer.
Specific Types of Virus:-
1. Boot sector viruses
Boot sector viruses were the first type of PC virus to appear. They spread by modifying
he boot sector, which contains the program that enables your computer to start up. When
you switch on, the hardware looks for the boot sector program - which is usually on the
hard disk, but can be on floppy or CD - and runs it. This program then loads the rest of
the operating system into memory. A boot sector virus replaces the original boot sector
with its own, modified version. When you next startup, the infected boot sector is used
and the virus becomes active.
2. Parasitic viruses (file viruses)
Parasitic viruses also known as file viruses; attach themselves to programs (or
‘executables’). When you start a program infected with a file virus, the virus is launched
first. To hide itself, the virus then runs the original program. The operating system on
your computer sees the virus as part of the program you were trying to run and gives it
the same rights. These rights allow the virus to copy itself, install itself in memory or
release its payload.
2. 3. Macro viruses
Macro viruses take advantage of macros, commands that are embedded in files and run
automatically. Many applications, such as word processing or spreadsheet programs, use
macros. A macro virus is a macro program that can copy itself and spread from one file
to another. If you open a file that contains a macro virus, the virus copies itself into the
application’s startup files. The computer is now infected. When you next open a file
using the same application, the virus infects that file. If your computer is on a network,
the infection can spread rapidly: when you send an infected file to someone else, they can
become infected too. A malicious macro can also make changes to your documents or
settings. Macro viruses infect files used in most offices and some can infect several file
types, such as Word or Excel files. They can also spread to any platform on which their
‘host’ application runs. Above all, they spread easily because documents are exchanged
frequently via email and websites.
4. Other Malicious Programs
4.1 Trojan Horses
Trojan Horses (often just called Trojans) are programs that do things that are not
described in their specifications. The user runs what they think is a legitimate program,
allowing it to carry out hidden, often harmful, functions. Trojan horses are sometimes
used as a means of infecting a user with a computer virus.
4.2 Backdoor Trojans
Backdoor Trojans are programs that allow other computer users to take control of your
PC over the internet.
4.3 Worms
Worms are similar to viruses but do not need a carrier. Worms simply create exact copies
of themselves and use communications between computers to spread. This can be things
like Email, network connections or Instant Messaging.
4.4. Hoaxes
Hoaxes are reports of non-existent viruses. Typically, they are emails which do some or
all of the following:
Warn you that there is an undetectable, highly destructive new virus. Ask you to avoid
reading emails with a particular subject line. Claim that the warning was issued by a
3. major software company, internet provider or government agency. Claim that a new virus
can do something improbable. For instance, a moment of silence says that ‘no program
needs to be exchanged for a new computer to be infected’. Use techno-babble to describe
virus effects. Urge you to forward the warning to other users.
Why are hoaxes a problem?
Hoaxes can be as disruptive and costly as a genuine virus. If users do forward a hoax
warning to all their friends and colleagues, there can be a deluge of email. This can
overload mail servers and make them crash. The effect is the same as that of a real virus,
but the hoaxer hasn’t even had to write any computer code.
It isn’t just end-users who overreact. Companies who receive hoaxes often take drastic
action, such as closing down a mail server or shutting down their network. This cripples
communications more effectively than many real viruses, preventing access to email that
may be really important. False warnings also distract from efforts to deal with real virus
threats. Hoaxes can be remarkably persistent too. Since hoaxes aren’t viruses, your anti-
virus software can’t detect or disable them.
Can you get a virus just by reading email?
Some users think they are always safe to open email as long as they don’t look at
attachments. This is no longer necessarily true. Some viruses can infect users when they
read email. They look like any other message but contain a hidden script that runs as soon
as you open the email, or even look at it in the preview pane (as long as you are using
Outlook with the right version of Internet Explorer). This script can change system
settings and send the virus to other users via email.
Email hoaxes
Email is a popular medium for hoaxes. These are bogus virus reports that urge you to
forward the message to everyone you know. An email hoax can spread across networks
like a virus and can cause a mail overload. The difference is that the hoax doesn’t need
virus code; it simply depends on users’ credulity. For more information, see the ‘Virus
hoaxes’ chapter.
Viruses that spread automatically by email The most successful viruses today are those
that spread themselves automatically by email. Typically, these viruses depend on the
user clicking on an attached document. This runs a script that uses the email program to
forward infected documents to other email users. Melissa, for example, sends a message
to the first fifty addresses in all address books that Microsoft Outlook can access. Other
viruses send themselves to every address in the address book.
4. 6. Spam
Spam is unsolicited email, often advertising get-rich quick schemes, home working jobs,
loans or pornographic websites. Spam often comes with fake return information, which
makes it more difficult to deal with the perpetrators. Such mail should simply be deleted.
The risks of attachments The greatest security risk at present isn’t email itself but email
attachments. Any program, document or spreadsheet that you receive by email could
carry a virus; launching such an attachment can infect your computer. Unfortunately,
email attachments are a popular way to exchange information. Many users think its
‘harmless fun’ to circulate screensavers, greetings cards, animations or joke programs.
However, such files can carry viruses. In fact virus writers like to use these more
recreational emails to spread their wares as people tend to share them widely and
thoughtlessly. Even an attachment that appears to be a safe type of file, e.g. a file with a
.txt extension, can pose a threat. That ‘text file’ may actually be a malicious VBS script
with the file extension (.vbs) hidden from view.
Can I be infected just by visiting websites?
Visiting a website is less hazardous than opening unknown programs or documents.
There are risks, though. The threat depends on the types of code used in the site and the
security measures taken by service providers and by you. Here are the main types of code
you will encounter.
1. Backdoor Trojans
A backdoor Trojan is a program that allows someone to take control of another user’s PC
via the internet. Like other Trojans, a backdoor Trojan poses as legitimate or desirable
software. When it is run, it adds itself to the PC’s startup routine. The Trojan can then
monitor the PC until it makes a connection to the internet. Once the PC is on-line, the
person who sent the Trojan can use software on their computer to open and close
programs on the infected computer, modify files and even send items to the printer.
2. Cookies
Cookies do not pose a direct threat to your computer or the data on it. However, they do
threaten your confidentiality: a cookie enables a website to remember your details and
keep track of your visits to the site. If you prefer to remain anonymous, you should use
the security settings on your browser to disable cookies.
################### END #######################