Open source
Software whose source code is made available through an open-source license in which the copyright holder grants the right to study, change, and distribute the software for free.
Powershell
A scripting language built into Microsoft Windows that allows for the automation of system administration tasks.
Spear-Phishing
Phishing that is targeted at, and tailored to, a specific individual. Distinct from regular phishing which is broadcast and not tailored.
Threat Actor
An individual, group, organization, government, or government sponsored entity that conducts or has the intent to conduct malicious activities.