Malware

An artificial word made up of "malicious" and "software" for software that performs undesirable and usually harmful functions. Whether you have already become a victim yourself and whether private information can be found on the net can be checked by these (reputable) institutes:

 https://haveibeenpwned.com/ 

https://sec.hpi.de/ilc/

https://breachalarm.com/

https://monitor.firefox.com/

(VSS, DGA, Dual Use, IT Forensics, Man in the Middle, RCE, Trojaner, Virus, Worm)