Astaroth is a widespread fileless malware campaign spotted with the lived off the land method to attack Windows users with advanced persistent technique to evade the detection. Microsoft uncovered the malware using anomaly detection algorithm and the observation of sudden spike in the use of Windows Management Instrumentation Command-line (WMIC) tool to run the malicious script. The malware resides in the memory to steal sensitive information like credentials, keystrokes, and other data eventually exfiltrate the data and share it to the attacker remotely.”]
Source: https://gbhackers.com/microsoft-spotted-new-fileless-malware-astaroth/