Polymorphic Virus

When unknown advertisements are popping up on the screen or files are multiplying/duplicating on their own,then your system is infected with some type of polymorphic viruses.

A polymorphic virus is a harmful, destructive or intrusive type of malware that can change or “morph,” making it difficult to detect.

polymorphic viruses produces malicious code that replicates itself endlessly and repeatedly changes its characteristics in an attempt to evade and outwit your computer’s defenses and eventually sabotage your system.When an antivirus software identifies a polymorphic virus, the virus modifies itself thereby, it is no longer detectable using the previous signature.

This ability renders signature-based security useless, and the threat continues to increase in intensity.

It is a threat that constantly changes to avoid detection, and is relentless.These viruses are especially threatening because antivirus programs have a very hard time detecting them.

Many of the common forms of malware can be polymorphic, including viruses, worms, bots, trojans, or keyloggers.

Polymorphic viruses are usually spread via spam email, malware or infected websites. VIRLOCK, one of the most notorious polymorphic viruses, evolved to combine file infection and ransomware, making it especially difficult to detect and remove.

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Notorious polymorphic viruses

URSNIF, VIRLOCK, VOBFUS, and BAGLE or UPolyX are some of the most notorious polymorphic viruses in existence. When combined with other malicious routines, polymorphic viruses pose even greater risk to its victims. In March 2015, researchers found that VIRLOCK evolved to include ransomware routines, making it a challenge to detect and remove.

1.Elk Cloner virus:One typical harmless virus was known as Elk Cloner virus written by Richard Skrenta, a 15-year-old high school
student, around 1982 which displayed a little poem on the screen.
It did not damage any resources on computer but annoyed people
with the poem message.This virus was able to
spread to infect another operating system running.
2.Storm Worm Email: The infamous spam email sent in 2007 with the subject “230 dead as storm batters Europe” was, at one point, responsible for as much as 8% of all global malware infections.
3.CryptoWall Ransomware: CryptoWall is a polymorphic ransomware strain that encrypts files on the victim’s computer and demands a ransom payment for their decryption.

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Symtem of polymorphic viruses

You can identify if  there is a virus attack of polymorphic viruses on your computer or network only when:

  • Unknown advertisements popping up on the screen
  • Programs running on their own
  • Files multiplying/duplicating on their own
  • Unknown files or programs on the computer
  • Files, folders or programs getting deleted or corrupted
  • The sound of a hard drive
  • Slowing down computer performance

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Protection against Polymorphic malware

1.Keep Your Software Up To Date

2.Do Not Click Suspicious Links or Attachments

3.Use Strong Passwords and Change Them Regularly

4.Leverage Behavior-Based Detection Tools

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