Trojan.Agent refers to a generic Trojan malware detection. It is used for detections that are either associated with no specific malware families or not enough information is available to pinpoint the malware family.
Backdoor.SpamTool is a generic detection for Trojan applications that may harvest stored credentials and email addresses for the purposes of spam distribution. Collected email addresses may be used to send spam email messages. Found credentials may be used to send spam email or post spam comments to forums, websites, social media websites, etc. on behalf of unsuspecting users.
Backdoor.SpamTool may run as a start-up entry and may be visible as running processes on compromised machines. Alternatively, Backdoor.SpamTool may be configured in a manner which prevents visible processes and start-up entries
Backdoor.SpamTool may be distributed using various methods. This software may be packaged with free online software, or could be disguised as a harmless program and distributed by email. Alternatively, this software may be installed by websites using software vulnerabilities. Infections that occur in this manner are usually silent and happen without user knowledge or consent.
Malwarebytes protects users from the installation of Backdoor.SpamTool.
Malwarebytes can detect and remove many Backdoor.SpamTool infections without further user interaction.