Astaroth Trojan and information stealer is a malware strain capable of stealing sensitive information such as user credentials from its victims using a key logger module, operating system calls interception, and clipboard monitoring. The malware campaign discovered by the Microsoft Defender ATP Research Team uses several lifeless techniques and a multi-stage infection process that starts with a spear-phishing email containing a malicious link that leaded the potential victims to an LNK file. At no point during the attack chain is any file run that s not a system tool.
Source: https://www.bleepingcomputer.com/news/security/microsoft-discovers-fileless-astaroth-trojan-campaign/