As cybercriminals start to focus on pulling off attacks without leaving a trace, fileless malware will become a more common attack method. However, many of these malware are fileless only while entering a user’s system, as they eventually reveal themselves when they execute their payload. Attacks that use completely fileless malware are a rare occurrence, so we thought it important to discuss a new trojan known as JS_POWMET that uses a completely fileless infection chain making it more difficult for anti-malware engineers to examine.
Post from: Trendlabs Security Intelligence Blog - by Trend Micro
A Look at JS_POWMET, a Completely Fileless Malware