The Emotet Trojan has been dormant for over five months. It has now started sending spam emails that will install the TrickBot trojan on infected computers. TrickBot is an advanced malware that infects Windows machines and is commonly seen targeting enterprise networks. It will download modules that perform various malicious activities on an infected computer. Even worse, it will open up a reverse shell to the Ryuk and Conti Ransomware actors. This reverse shell will allow the ransomware operators to access the network, steal unencrypted files, and then deploy their ransomware.
Source: https://www.bleepingcomputer.com/news/security/emotet-trickbot-malware-duo-is-back-infecting-windows-machines/