HackTool is an Adware software that delivers advertisement content to end-user and may be considered privacy-invasive. This set of malware includes toolbars, multi-offer installers, intrusive and fraudulent applications, free versions of commercial products which displays advertising, and any software that is funded by advertising. Also some forms of hacker or risk tools might be classified as potentially harmful as they can be misused by an attacker (e.g. password revealers).