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Computer Worm - I Eat and Infect

 



When we hear the term computer worm, it is sometimes classified to a virus. Though sharing similar traits, they are completely different in their mode of infection and operation.

A computer virus usually gains entry through a file or attachment. Once inside, they need to be activated by the user. This is done by opening the infected file or executing it.

A worm, though mode of entry is the same, does not require user assistance. They infect and replicate completely autonomous.

Mode of Entry
  • File sharing: Disguised as non-suspicious media files, they spread through sharing sites like Torrent.
  • Social media: Appears as interesting links, they prompt the user to click and download.
  • Phishing: Spreads via email attachments, usually from a contact whose system has been infected.
  • Zero-day exploits: Sometimes the operating system has some bugs or security weakness which gets compromised.
  • External devices: Infected portable hard disc or USB drive    
  •  

Symptoms

  • Low internet speed.
  • Computer becomes slow and sluggish.
  • Files gets corrupt or missing.
  • Firewall starts giving repeated alerts.

Prevention
  • Make sure firewall is always on and active. Do not disable without prior reasons.
  • Invest in a paid antivirus software like Norton or McAfee.
  • If a file or email attachment appears suspicious, do not download. This is true even from trusted contacts.



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