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Uses of Antivirus TRB CSI › Cyber Security › antivirus use
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Uses of Antivirus

Antivirus software is used to detect, prevent, isolate, and remove malicious software from a computer or digital device. தமிழில்: Virus, Worm, Trojan, Spyware, Ransomware போன்ற malicious software-ஐ கண்டுபிடித்து, system-க்கு damage ஏற்படாம…

Free Beginner 13 min 80 cards 1 programs 10 MCQs v2
ANTIVIRUS USES

Antivirus software-ன் main purpose computer, laptop, mobile மற்றும் other digital devices-ஐ malware attacks-இலிருந்து protect செய்வது.

Simple-ஆக
Program
Text 1 lines 
1Antivirus = Detect + Block + Quarantine + Remove Malware
Definition
Meaning

Antivirus software is used to detect, prevent, isolate, and remove malicious software from a computer or digital device.

தமிழில்

Virus, Worm, Trojan, Spyware, Ransomware போன்ற malicious software-ஐ கண்டுபிடித்து, system-க்கு damage ஏற்படாமல் தடுக்கும் security software தான் Antivirus.

Simple Explanation
ஒரு suspicious file computer-க்கு வருகிறது
  1. File Download
  2. Antivirus Scan
  3. Threat Found?/ \Yes No↓ ↓Block Allow
  4. Quarantine / Remove
Explanation
Main uses of antivirus
Antivirus-ன் முக்கியமான uses
  • Virus Detection
  • Malware Removal
  • Real-Time Protection
  • File Scanning
  • Download Protection
  • Email Attachment Protection
  • USB Device Scanning
  • Ransomware Protection
  • Quarantine
  • System Monitoring
  • Web Protection
  • Scheduled Scanning
Explanation
Core idea

1. VIRUS DETECTION

Explanation
Core idea

Antivirus computer-ல் virus இருக்கிறதா என்று scan செய்கிறது.

Detail 01
  1. Computer Files
  2. Antivirus
  3. Known Virus Signature Found
  4. Threat AlertUse
Detail 02

Virus system files-ஐ damage செய்வதற்கு முன் detect செய்ய உதவும்.

List
  1. MALWARE DETECTION
Explanation
Core idea

Modern antivirus virus மட்டும் அல்லாமல் பல malware types-ஐ detect செய்யும்.

Examples
  • Virus
  • Worm
  • Trojan
  • Spyware
  • Ransomware
  • Rootkit
  • Keylogger
  • Adware
Important

All viruses are malware, but all malware are not viruses.

Important

1. MALWARE REMOVAL

Important
  1. Detected malware-ஐ antivirus

    Delete

  2. Remove

  3. Clean

  4. Repair

  5. செய்ய முயற்சிக்கும்.

  6. Malware Detected

  7. ↓

  8. Remove / Delete

  9. ↓

  10. System Cleaned

Important

1. REAL-TIME PROTECTION

Definition
Meaning

Computer use செய்யும் நேரத்திலேயே files, programs மற்றும் downloads-ஐ continuously monitor செய்வது.

Explanation
Example
Core idea
  1. User Opens File
  2. Antivirus Checks Immediately
  3. Safe?/ \Yes No↓ ↓Open Block
Detail 01

இதுதான் Real-Time Protection.

List
  1. FILE SCANNING
Explanation
Core idea

Antivirus files மற்றும் folders-ஐ manually அல்லது automatically scan செய்ய முடியும்.

Detail 01
  • Scan Types
  • Quick Scan
  • Full Scan
  • Custom Scan
Explanation
Quick scan
Core idea
  1. Quick Scan
  2. MemorySystem AreasStartup Locations
Important

system locations மட்டும் scan செய்கிறது.

Explanation
Full scan
Core idea

Entire computer scan செய்கிறது.

Detail 01
  1. Full Scan
  2. All DrivesAll FilesAll Folders
Explanation
Custom scan
Core idea

User select செய்த specific file/folder மட்டும் scan செய்யப்படுகிறது.

Detail 01
  1. Downloads Folder
  2. Custom Scan
List
  1. DOWNLOAD PROTECTION
Explanation
Core idea

Internet-லிருந்து file download செய்யும்போது antivirus அதை scan செய்யலாம்.

Detail 01
  1. Internet
  2. Download File
  3. Antivirus
  4. Safe → AllowThreat → Block
Detail 02

இதனால் malicious files execute ஆகும் risk reduce ஆகும்.

List
  1. EMAIL ATTACHMENT PROTECTION
Explanation
Core idea

Email attachment-ல் malware இருக்கலாம்.

Detail 01
  1. Email
  2. Attachment
  3. Antivirus Scan
  4. Malware?
Detail 02

Antivirus suspicious attachment-ஐ block செய்ய உதவும்.

List
  1. USB DEVICE SCANNING
Explanation
Core idea

Pendrive / External Drive மூலம் malware spread ஆகலாம்.

Antivirus
  1. USB Connected
  2. Scan USB
  3. Threat Detection
Detail 02

செய்ய முடியும்.

List
  1. RANSOMWARE PROTECTION
Explanation
Core idea

Ransomware files-ஐ encrypt செய்து money demand செய்யும்.

Detail 01

Antivirus suspicious behaviour detect செய்து ransomware-ஐ block செய்ய முயற்சிக்கலாம்.

Detail 02
  1. Program
  2. Encrypting Many Files
  3. Antivirus Detects Suspicious Behaviour
  4. Block
List
  1. QUARANTINE
Definition
Meaning

Suspicious/infected file-ஐ system-இலிருந்து isolate செய்வது.

  1. Threat File
  2. Quarantine
  3. Isolated Area

இதனால் அது normal system files-ஐ affect செய்யாமல் இருக்க உதவும்.

Definition
Meaning

1. SPYWARE PROTECTION

Definition
Meaning

Spyware user activity-ஐ secretly monitor செய்யும்.

Antivirus spyware-ஐ detect செய்து remove செய்ய உதவும்.

Spyware steal செய்யக்கூடிய information
  • Passwords
  • Browsing history
  • Personal data
  • Login information
Definition
Meaning

1. TROJAN PROTECTION

Definition
Meaning

Trojan genuine software போல disguise ஆகும் malware.

Explanation
Example
Core idea
  1. Free Software
  2. Actually Trojan
  3. Antivirus Detects
Detail 01

இதனால் hidden malicious software-ஐ identify செய்யலாம்.

List
  1. WORM PROTECTION
Explanation
Core idea

Worm network-ல் self-replicate செய்து spread ஆகலாம்.

Detail 01

Antivirus infected files/processes-ஐ identify செய்து block/remove செய்ய உதவும்.

List
  1. KEYLOGGER PROTECTION
Explanation
Core idea

Keylogger keyboard inputs record செய்யலாம்.

Detail 01
  1. User Types Password
  2. Keylogger Records
  3. Attacker Gets Password
Detail 02

Antivirus malicious keylogger software-ஐ detect செய்ய முயற்சிக்கும்.

List
  1. WEB PROTECTION
Explanation
Core idea

சில antivirus/security suites malicious websites மற்றும் dangerous downloads-ஐ block செய்ய உதவும்.

Detail 01
  1. User Opens Website
  2. Security Check
  3. Known Malicious Site?
  4. Warning / Block
List
  1. PHISHING PROTECTION
Explanation
Core idea

சில antivirus products known phishing websites பற்றி warning தரலாம்.

Detail 01

ஆனால் antivirus மட்டும் phishing-ஐ முழுமையாக prevent செய்ய முடியாது.

Detail 02

User awareness மிகவும் important.

List
  1. SYSTEM MONITORING
Explanation
Core idea

Antivirus unusual behaviour monitor செய்யலாம்.

ஒரு program
  • System files modify செய்கிறது
  • Many files encrypt செய்கிறது
  • Suspicious process create செய்கிறது
Detail 02

என்றால் threat என்று identify செய்யலாம்.

List
  1. SCHEDULED SCANNING
Explanation
Core idea

User ஒரு particular time-க்கு automatic scan schedule செய்யலாம்.

Detail 01
  1. Every Sunday10:00 PM
  2. Full System Scan
Detail 02

இதனால் manual scan மறந்தாலும் regular checking நடக்கும்.

List
  1. THREAT ALERTS
Explanation
Core idea

Threat detect ஆனால் antivirus notification/warning தரும்.

Detail 01
  • Threat Detected
  • Trojan Found
  • Action Required
User
  • Quarantine
  • Delete
  • Allow
Detail 03

போன்ற action choose செய்யலாம்.

List
  1. SIGNATURE-BASED DETECTION
Explanation
Core idea

Known malware signatures database-ஐ compare செய்து detect செய்கிறது.

Detail 01
  1. Suspicious File
  2. Compare with Malware Database
  3. Match Found
  4. Malware Detected
List
  1. HEURISTIC DETECTION
Explanation
Core idea

Exact known signature இல்லாவிட்டாலும் suspicious characteristics analyze செய்கிறது.

Detail 01
  1. Unknown Program
  2. Suspicious Code Pattern
  3. Possible Malware
List
  1. BEHAVIOR-BASED DETECTION
Explanation
Core idea

Program actual behaviour monitor செய்யப்படுகிறது.

Detail 01
  1. Program
  2. Deletes System Files
  3. Suspicious Behaviour
  4. Blocked
Flow
Antivirus use flow
  1. File / Program
  2. Antivirus Scan
  3. Signature CheckHeuristic CheckBehaviour Check
  4. Threat?/ \No Yes↓ ↓Allow Block
  5. Quarantine
  6. Remove[ANTIVIRUS vs FIREWALL]

இது முக்கியமான exam comparison.

Table
AntivirusFirewall
Malware detect செய்கிறதுNetwork traffic control செய்கிறது
Files scan செய்கிறதுPackets/connections filter செய்கிறது
Virus/Trojan remove செய்கிறதுUnauthorized network access block
Endpoint protectionNetwork protection
Flow

Memory

Antivirus
Malware
Firewall
Traffic
Explanation
Advantages of antivirus
Core idea
  • Malware detection
  • Virus removal
  • Real-time protection
  • Safe downloads
  • USB protection
  • Email attachment scanning
  • Ransomware detection
  • Threat alerts
  • System monitoring
  • Quarantine facility
Explanation
Limitations
Core idea

Antivirus 100% security guarantee அல்ல.

இதனால் மட்டும்
  • Phishing முழுமையாக stop செய்ய முடியாது
  • Weak passwords protect ஆகாது
  • Social engineering prevent ஆகாது
  • Every new malware detect ஆகும் guarantee இல்லை
  • Data backup automatically guarantee செய்யாது
Important
  1. Complete security-க்கு antivirus உடன்

    Antivirus

  2. +

  3. Firewall

  4. +

  5. Strong Password

  6. +

  7. MFA

  8. +

  9. Software Updates

  10. +

  11. Backup

  12. +

  13. User Awareness

  14. தேவை.

Common Mistake
Wrong

Antivirus only removes viruses.

Correct · Modern antivirus பல malware-ஐ detect செய்யும்
  • Virus
  • Worm
  • Trojan
  • Spyware
  • Ransomware
  • Keylogger
  • Rootkit
Common Mistake
Wrong

Antivirus installed என்றால் update தேவையில்லை.

Correct

Regular update மிகவும் முக்கியம்.

Reason

New malware தொடர்ந்து உருவாகிறது.

Common Mistake
Wrong

Firewall and Antivirus same.

Correct
  • Antivirus → Malware Protection
  • Firewall → Network Traffic Protection
Memory Trick
Antivirus uses நினைவில் வைக்க · S D B Q R
  • S - Scan
  • D - Detect
  • B - Block
  • Q - Quarantine
  • R - Remove
TRB Point

TRB / NET / SET examination-க்கு முக்கியமான points

  1. Antivirus is used for

    Detecting malware

  2. Preventing malware execution

  3. Quarantining infected files

  4. Removing malicious software

  5. Real-time protection

  6. File scanning

  7. USB scanning

  8. Download protection

  9. Signature Detection

  10. Known malware.

  11. Heuristic Detection

  12. Suspicious characteristics.

  13. Behavior Detection

  14. Program actions.

Interview Point
Question

What is the use of antivirus software?

Answer

Antivirus software is used to scan, detect, prevent, quarantine, and remove malware such as viruses, worms, Trojans, spyware, and ransomware from digital devices.

MCQ
68The primary use of antivirus is:
Choose one answer
MCQ
69Antivirus isolates suspicious files using:
Choose one answer
MCQ
70Continuous malware monitoring is called:
Choose one answer
MCQ
71Which scan checks the entire computer?
Choose one answer
MCQ
72Which technique detects known malware patterns?
Choose one answer
MCQ
73Which technique analyzes suspicious actions?
Choose one answer
MCQ
74Antivirus can scan:
Choose one answer
MCQ
75Antivirus mainly protects against:
Choose one answer
MCQ
76Which security software mainly filters network traffic?
Choose one answer
MCQ
77Antivirus should be:
Choose one answer
Practice

What is Antivirus?
List five uses of antivirus.
Explain Real-Time Protection.
What is Quarantine?
Explain File Scanning.
What is Full Scan?
What is Quick Scan?
Explain Signature-Based Detection.
Explain Heuristic Detection.
Explain Behavior-Based Detection.
How does antivirus protect USB devices?
How does antivirus help against ransomware?
Differentiate Antivirus and Firewall.
Why should antivirus be updated?
Explain limitations of antivirus.

Summary
  1. ANTIVIRUS USES
  2. |
  3. --------------------------------
  4. | | | || | |
  5. Scan Detect Block QuarantineQuarantine
  6. |
  7. Remove
  8. Majoruses:
  9. Antivirus
  10. |
  11. ├── Virus Detection
  12. ├── Malware Removal
  13. ├── Real-Time Protection
  14. ├── File Scanning
  15. ├── Download Scanning
  16. ├── Email Protection
  17. ├── USB Scanning
  18. ├── Ransomware Protection
  19. ├── Quarantine
  20. └── Threat Monitoring
Explanation
Short description
Core idea

Antivirus software is used to detect, prevent, block, quarantine, and remove malware while providing real-time protection for files, downloads, email attachments, USB devices, and system activities.

Detail 01

Final Exam Memory

Detail 02

Antivirus → Malware Protection

Detail 03

Scan → Find Threat

Detail 04

Detect → Identify Threat

Detail 05

Block → Stop Threat

Detail 06

Quarantine → Isolate Threat

Detail 07

Remove → Delete Threat

Detail 08

Real-Time Protection → Continuous Monitoring

Detail 09

Antivirus → Malware

Detail 10

Firewall → Network Traffic.

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