This document discusses different types of malicious software including viruses, trojan horses, worms, and spyware. It provides details on how each type spreads and the harm they can cause. Viruses spread by infecting other files or programs and can corrupt data or disrupt systems. Trojan horses disguise harmful programs as legitimate ones. Worms replicate across networks and can delete files or disrupt systems. The document outlines strategies for prevention, detection, and removal of malicious software.
Malicious Software,Terminology of malicious programme,Malicious programs,Nature of Viruses,Virus Operation-four phases or life cycle of virus,Virus Structure,Types of Viruses,Anti-Virus Software
Malicious Software,Terminology of malicious programme,Malicious programs,Nature of Viruses,Virus Operation-four phases or life cycle of virus,Virus Structure,Types of Viruses,Anti-Virus Software
What is the meaning of the term logic bomb? What are the features and examples of logic bomb malware? Finally, how to protect yourself from logic bombs?
This report describes Remote File Inclusion (RFI) – an attack that usually flies under the radar. Although RFI attacks have the potential to cause as much damage as the more popular SQL injection and cross-site scripting (XSS) attacks, they are not widely discussed. Imperva’s Hacker Intelligence Initiative (HII) has documented examples of automated attack campaigns launched in the wild. This report pinpoints common traits and techniques as well as the role blacklisting can play in mitigation.
What is the meaning of the term logic bomb? What are the features and examples of logic bomb malware? Finally, how to protect yourself from logic bombs?
This report describes Remote File Inclusion (RFI) – an attack that usually flies under the radar. Although RFI attacks have the potential to cause as much damage as the more popular SQL injection and cross-site scripting (XSS) attacks, they are not widely discussed. Imperva’s Hacker Intelligence Initiative (HII) has documented examples of automated attack campaigns launched in the wild. This report pinpoints common traits and techniques as well as the role blacklisting can play in mitigation.
Name (Trojan horse) According to legend , the Greeks won the Trojan war by hiding in a huge, hollow wooden horse to sneak into the fortified city of Troy. It was built and filled with Greek warriors to get in troy city and open doors for all warriors out side troy city waiting to enter the city.
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?
.
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.
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.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
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Topics covered:
UI automation Introduction,
UI automation Sample
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Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
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LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
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GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
2. Software deliberately designed to harm
computer systems.
Malicious software program causes undesired
actions in information systems.
Spreads from one system to another through:
1. E-mail (through attachments)
2. Infected floppy disks
3. Downloading / Exchanging of corrupted files
4. Embedded into computer games
5. These are the programs that spread to other
software in the system .i.e., program that
incorporates copies of itself into other programs.
Two major categories of viruses:
1. Boot sector virus : infect boot sector of systems.
become resident.
activate while booting machine
2. File virus : infects program files.
activates when program is
run.
6. Dormant phase - the virus is idle
Propagation phase - the virus places an
identical copy of itself into other programs
Triggering phase – the virus is activated to
perform the function for which it was
intended
Execution phase – the function is performed
Henric Johnson 6
7. Polymorphic
Virus
Produces
modified & fully
operational code.
Produces new
& different code
every time when
virus is copied &
transmitted to a
new host.
Difficult to
detect & remove.
Stealth
Virus
Programming
tricks make the
tracing and
understanding
the code difficult.
Complex
programming
methods used to
design code, so
difficult to repair
infected file.
Armored
Virus
Hides
modifications it
has made to
files or to the
disk.
Reports
false values to
programs as
they read files
or data from
storage media.
Companion
Virus
Creates new
program instead
of modifying
existing program.
Contains all
virus code.
Executed by
shell, instead of
original program.
8. Identifying Viruses :
A virus is a unique program.
It as a unique object code.
The pattern of object code and where it is inserted
provides a signature to the virus program.
This virus signature can be used by virus scanners to
identify and detect a particular virus.
Some viruses try to hide or alter their signature:
Random patterns in meaningless places.
Self modifying code – metamorphic, polymorphic
viruses.
Encrypt the code, change the key frequently.
9. Effect of Virus attack on computer system
Virus may affect user’s data in memory –
overwriting.
Virus may affect user’s program – overwriting.
Virus may also overwrite system’s data or
programs – corrupting it – disrupts normal
operation of system.
“Smashing the Stack” – Buffer overflow due to
execution of program directed to virus code.
10. prevention - ideal solution but difficult
realistically need:
◦ detection
◦ identification
◦ removal
if detect but can’t identify or remove, must
discard and replace infected program
11. virus & antivirus tech have both evolved
early viruses simple code, easily removed
as become more complex, so must the
countermeasures
generations
first - signature scanners
second - heuristics
third - identify actions
fourth - combination packages
12. runs executable files through GD scanner:
CPU emulator to interpret instructions
virus scanner to check known virus signatures
emulation control module to manage process
lets virus decrypt itself in interpreter
periodically scan for virus signatures
issue is long to interpret and scan
tradeoff chance of detection vs time delay
13.
14. Rabbit : This malicious software replicates
itself without limits. Depletes some or all the
system’s resources.
Re-attacks the infected systems – difficult
recovery.
Exhausts all the system’s resources such as CPU
time, memory, disk space.
Depletion of resources thus denying user access
to those resources.
15. Hoaxes : False alerts of spreading viruses.
e.g., sending chain letters.
message seems to be important to recipient,
forwards it to other users – becomes a chain.
Exchanging large number of messages (in chain)
floods the network resources – bandwidth wastage.
Blocks the systems on network – access denied due
to heavy network traffic.
16. A Trojan horse (or Trojan) is a malware program
that appears to perform some useful task, but
which also does something with negative
consequences (e.g., launches a keylogger).
Trojan horses can be installed as part of the
payload of other malware but are often installed
by a user or administrator, either deliberately or
accidentally.
6/13/2014Malware 16
18. A "time bomb" is simply a Trojan horse set to
trigger at a particular time/date.
19. one of oldest types of malicious software
code embedded in legitimate program
activated when specified conditions met
◦ eg presence/absence of some file
◦ particular date/time
◦ particular user
when triggered typically damage system
◦ modify/delete files/disks, halt machine, etc
20. Trojans currently have largest infection potential
◦ Often exploit browser vulnerabilities
◦ Typically used to download other malware in multi-stage attacks
6/13/2014Malware 20
Source:
Symantec Internet
Security Threat
Report, April 2009
21. 1. Remote access Trojan takes full control of
your system and passes it to the hacker.
2. The data-sending Trojan sends data back to
the hacker by means of e-mail.
e.g., Key-loggers – log and transmit each
keystroke.
22. 3. The destructive Trojan has only one purpose: to
destroy and delete files. Unlikely to be detected
by anti-virus software.
4. The denial-of-service (DOS) attack Trojans
combines computing power of all
computers/systems it infects to launch an attack
on another computer system. Floods the system
with traffic, hence it crashes.
5. The proxy Trojans allows a hacker to turn user’s
computer into HIS (Host Integration Server) server
– to make purchases with stolen credit cards and
run other organized criminal enterprises in
particular user’s name.
23. 6. The FTP Trojan opens port 21 (the port for
FTP transfer) and lets the attacker connect
to your computer using File Transfer
Protocol (FTP).
7. The security software disabler Trojan is
designed to stop or kill security programs
such as anti-virus software, firewalls, etc.,
without you knowing it.
24. Transmitting medium :
1. spam or e-mail
2. a downloaded file
3. a disk from a trusted source
4. a legitimate program with the Trojan inside.
Trojan looks for your personal information and
sends it to the Trojan writer (hacker). It can also
allow the hacker to take full control of your
system.
25. For example, you download what appears
to be a movie or music file, but when you
click on it, you unleash a dangerous
program that erases your disk, sends your
credit card numbers and passwords to a
stranger, or lets that stranger hack your
computer to commit illegal Denial of service
attacks .
26. 1. Clean Re-installation:
Back up your entire hard disk, format the
disk, re-install the operating system and all
your applications from original CDs.
27. 2. Anti-Virus Software:
Anti-virus software is always going to be playing
catch up with active virus on the system. Make
sure your computer has an anti virus program on
it and update it regularly. If you have an auto-
update option included in your anti-virus
program you should turn it on; that way if you
forget to update your software you can still be
protected from threats
Anti-Trojan Programs:
These programs are the most effective against
Trojan horse attacks, because they specialize in
Trojans instead of general viruses.
28. NEVER download blindly from people or sites which you
aren't 100% sure about
Even if the file comes from a friend, you still must be
sure what the file is before opening it
NEVER use features in your programs that automatically
get or preview files
Never blindly type commands that others tell you to
type, or go to web addresses mentioned by strangers,
or run pre-fabricated programs or scripts
29. A simple example of a trojan horse would be a
program named “waterfalls.scr" claiming to be a free
waterfall screensaver which, when run, instead would
allow access to the user's computer remotely.
AIDS(trojanhorse)
AIDS, also known as Aids Info Disk or PC Cyborg
Trojan, is a trojan horse that replaces the
AUTOEXEC.BAT file, which would then be used by AIDS
to count the number times the computer has booted.
Once this boot count reaches 90, AIDS hides
directories and encrypts the names of all files on drive
C: (rendering the system unusable).
30. Spyware :
Spyware programs explore the files in an
information system.
Information forwarded to an address specified in
Spyware.
Spyware can also be used for investigation of
software users or preparation of an attack.
31. Trapdoor :
Secret undocumented entry point to the program.
An example of such feature is so called back door,
which enables intrusion to the target by passing user
authentication methods.
A hole in the security of a system deliberately left in
place by designers or maintainers.
Trapdoor allows unauthorized access to the system.
Only purpose of a trap door is to "bypass" internal
controls. It is up to the attacker to determine how
this circumvention of control can be utilized for his
benefit.
33. Worms :
program that spreads copies of itself through a
network.
Does irrecoverable damage to the computer system.
Stand-alone program, spreads only through
network.
Also performs various malicious activities other than
spreading itself to different systems e.g., deleting
files.
34. 1. Deleting files and other malicious actions
on systems.
2. Communicate information back to attacker
e.g., passwords, other proprietary
information.
3. Disrupt normal operation of system, thus
denial of service attack (DoS) – due to re-
infecting infected system.
4. Worms may carry viruses with them.
35. Means of spreading Infection by Worms :
Infects one system, gain access to trusted host lists
on infected system and spread to other hosts.
Another method of infection is penetrating a
system by guessing passwords.
By exploiting widely known security holes, in case,
password guessing and trusted host accessing
fails.
e.g., A well-known example of a worm is the
ILOVEYOU worm, which invaded millions of
computers through e-mail in 2000.
36.
37. Code Red
◦ July 2001 exploiting MS IIS bug
◦ probes random IP address, does DDoS attack
Code Red II variant includes backdoor
SQL Slammer
◦ early 2003, attacks MS SQL Server
Mydoom
◦ mass-mailing e-mail worm that appeared in
2004
◦ installed remote access backdoor in infected
systems
Warezov family of worms
◦ scan for e-mail addresses, send in attachment
39. first appeared on mobile phones in 2004
target smartphone which can install s/w
they communicate via Bluetooth or MMS
to disable phone, delete data on phone, or
send premium-priced messages
CommWarrior, launched in 2005
replicates using Bluetooth to nearby phones
and via MMS using address-book numbers
40. overlaps with anti-virus techniques
once worm on system A/V can detect
worms also cause significant net activity
worm defense approaches include:
signature-based worm scan filtering
filter-based worm containment
payload-classification-based worm containment
threshold random walk scan detection
rate limiting and rate halting
41.
42.
43. Conclusion:
Preventing infection by malicious software :
Use only trusted software, not pirated software.
Test all new software on isolated computer system.
Regularly take backup of the programs.
Use anti-virus software to detect and remove viruses.
Update virus database frequently to get new virus
signatures.
Install firewall software, which hampers or prevents the
functionality of worms and Trojan horses.
Make sure that the e-mail attachments are secure.
Do not keep a floppy disk in the drive when starting a
program, unless sure that it does not include malicious
software, else virus will be copied in the boot sector.
44. Webopedia.com. Trojan Horse. Retrieved Nov 8, 2003 from website:
http://www.webopedia.com/TERM/T/Trojan_horse.html
Staffordshire University, Information & Security Team (Jun 8,
2002). Information Systems Security Guidelines. Retrieved
Nov 10, 2003 from website:
http://www.staffs.ac.uk/services/information_technology/regs/security7.shtm
M.E.Kabay, Norwich University, VT (2002). Malicious Software.
Retrieved Nov 9, 2003 from website:
http://www2.norwich.edu/mkabay/cyberwatch/09malware.htm
Computer Emergency Response Team (CERT), Information Security (Jul
2, 2002). Malicious Software – general. Retrieved Nov 10, 2003 from
website:
http://www.ficora.fi/englanti/tietoturva/haittaohj.htm