PowerShell was the source of more than a third of the critical security vulnerabilities identified in the second half of 2020, according to a Cisco survey released today at an RSA conference.
The top threat category identified across all Cisco Secure Endpoints were dual-use tools used for both exploitation and post-exploitation work.
PowerShell Empire, Cobalt Strike, PowerSploit, Metasploit and other similar tools have legal uses, Cisco said in its research, but they have also become tools commonly used by intruders. Such practices are used to avoid detection when running foreign tools or code for system breaches.
"According to Cisco Research, PowerShell is the source of more than a third of critical threats," says Gedeon Hombrebueno, Cisco Secure Endpoint Security Product Manager.
Cisco offers some protection steps that, of course, are facilitated by Cisco Secure Endpoint, but also some other EDR tools (from endpoint detection and response).
However, there are some steps that administrators can (and should) take completely free of charge, such as preventing or restricting the execution of PowerShell on accounts outside the administrator by allowing only signed scripts to be executed and the Constrained Language function to be used.
You can read detailed instructions for protecting PowerShell in the following white paper or try it PowerShell Protect