Troj/AdDrop-B is a Trojan for the Windows platform.
Troj/AdDrop-B drops an adware application without notifying the user. The Trojan also kills processes and services relating to anti-virus, firewall and other security software.
When Troj/AdDrop-B is installed it creates the file <Common Files>\Microsoft Shared\MSInfo\svcguest.exe. This is an encrypted copy of an adware application.