From 2-spyware.com
Trojan.MalPack – malware packer that spreads various threats, depending on the goal of malicious actors. It can trigger data exfiltration or damage even, so you should keep the machine clear of threats with anti-malware tools or security programs. The detection like this can be related to other threats, so you have no other option but to fully clean the machine from malware. Especially when Trojan.MalPack.GS and Trojan.MalPack.VB can be other variants of the packer malware. An infection like this can trigger issues with the machine only by running in the background, so you should react as soon as you notice any alterations on the machine or encounter the detection report by your AV tool.