To prevent similar issues from occurring again, the CISO should create an effective communication plan and ensure all employees are aware of it. A clear communication plan ensures that critical security information, such as breaches or vulnerabilities, is promptly communicated to the right stakeholders (e.g., the CEO) in a timely manner, preventing situations where the media reports on breaches before internal teams are fully informed. CASP+ emphasizes the importance of having structured communication protocols during security incidents to ensure accurate and timely responses.
Reference:
CASP+ CAS-004 Exam Objectives: Domain 2.0 - Enterprise Security Operations (Incident Communication Plans) CompTIA CASP+ Study Guide: Developing and Implementing Effective Incident Communication Plans

Comprehensive and Detailed Step by Step
SAML (Security Assertion Markup Language)is a standard for single sign-on (SSO) that provides centralized authentication and authorization, ensuring SaaS access is governed by organizational policies.
SLDAP (Secure LDAP)focuses on directory services but does not centralize SaaS product access.
VDI (Virtual Desktop Infrastructure)is unrelated to SaaS authentication.
TACACS (Terminal Access Controller Access-Control System)is more suited for network devices.
Reference:
CompTIA CASP+ Exam Objective 2.3: Implement authentication and authorization technologies.
CASP+ Study Guide, 5th Edition, Chapter 6, Identity and Access Management.

The SIEM events show that powershell.exe was executed on multiple endpoints with an outbound connection to 40.90.23.154, which is an IP address associated with malicious activity. This could indicate a malware infection or a command-and-control channel. The best response action is to configure the forward proxy to block 40.90.23.154, which would prevent further communication with the malicious IP address. Disabling powershell.exe on all endpoints may not be feasible or effective, as it could affect legitimate operations and not remove the malware. Restarting Microsoft Windows Defender may not detect or stop the malware, as it could have bypassed or disabled it. Disabling local administrator privileges on the endpoints may not prevent the malware from running or communicating, as it could have escalated privileges or used other methods. Verified Reference: https://www.comptia.org/blog/what-is-a-forward-proxy https://partners.comptia.org/docs/default-source/resources/casp-content-guide

Implementing an ongoing, third-party software and library review and regression testing is the best way to maximize risk reduction from vulnerabilities introduced by OpenSSL. Third-party software and libraries are often used by developers to save time and resources, but they may also introduce security risks if they are not properly maintained and updated. By reviewing and testing the third-party software and library regularly, the company can ensure that they are using the latest and most secure version of OpenSSL, and that their proprietary software is compatible and functional with it.