Adjective
fileless (not comparable)
Without a file or files; not utilising files.
Security researchers have recently a new fileless ransomware, dubbed "" which injects malicious code into a legitimate system process (svchost.exe) on a targeted system and then self-destruct itself in order to evade detection. Source: Internet
Miller said that though the malware was fileless in the sense it did not install itself on the hard drive, it did leave “some traces or artifacts in the file system registry.” Source: Internet
Survey responses estimated 29 percent of the attacks they faced during 2017 were fileless attacks, up from 20 percent the year before. Source: Internet
This emerging trend of fileless attacks, which compose over 50% of all threats, are extremely dangerous, constantly changing, and designed to evade traditional AV. Source: Internet
When attackers began using fileless malware in attacks on Windows, enterprises were required to verify or update their security programs to ensure their systems were protected. Source: Internet
Yeah, the term fileless is sometimes used very loosely! Source: Internet