HackTool.Agent.Nirsoft is Malwarebytes’ detection name for Hacktools published by Nir Sofer aka NirSoft.
Hack tools are a special kind of riskware. Riskware, in general, is a detection for items that are not strictly malicious, but pose some sort of risk for the user in another way. HackTool.Agent.Nirsoft can be used to retrieve Microsoft Office product keys from the registry.
Some hacktools are backdoored or can be found on sites of a shady nature.
Malwarebytes protects users from HackTool.Agent.Nirsoft by using real-time protection.
Malwarebytes can detect and remove HackTool.Agent.Nirsoft without further user interaction.
Should users wish to keep this program and exclude it from being detected in future scans, they can add the program to the exclusions list. Here’s how to do it.
If you want to allow the program to connect to the Internet, for example to fetch updates, also add an exclusion of the type Allow an application to connect to the internet and use the Browse button to select the file you wish to grant access.