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.
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.
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
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