Trojan.Downbot.D!gen3 is a heuristic detection used to detect threats associated with the Trojan.Downbot
family of threats.
Files that are detected as Trojan.Downbot.D!gen3 are considered malicious. We suggest that any files you believe are incorrectly detected as Trojan.Downbot.D!gen3 be submitted to Symantec Security Response. For instructions on how to do this using Scan and Deliver, read Submit Virus Samples
Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":