Apply appropriate updates provided by Mozilla to vulnerable systems immediately after appropriate testing. (M1051: software update)
o Backup 7.1: Establish and maintain a vulnerability management process: Establish and maintain a documented vulnerability management process for company assets. Review and update documentation annually or when significant changes within the business occur that could impact this protection.
o Backup 7.4: Perform automated application patch management: Perform application updates to enterprise assets via automated patch management on a monthly or more frequent basis.
o Backup 7.7: Fix detected vulnerabilities: Fix detected vulnerabilities in software through processes and tools on a monthly or more frequent basis, depending on the remediation process.
o Backup 9.1: Ensure only fully supported browsers and email clients are used: Ensure that only fully supported browsers and email clients are allowed to run in the enterprise, using only the latest version of browsers and email clients provided by the provider.
Apply the principle of least privilege to all systems and services. Run all software as an unprivileged user (without administrative privileges) to lessen the effects of a successful attack. (M1026: Management of privileged accounts)
o Backup 4.7: Manage Default Accounts on Enterprise Assets and Software: Manage default accounts on enterprise assets and software, such as root, administrator, and other pre-configured vendor accounts. Example implementations may include: disabling default accounts or rendering them unusable.
o Backup 5.4: Restrict admin privileges to dedicated admin accounts: Restrict admin privileges to dedicated admin accounts on company assets. Conduct general computing activities, such as browsing the Internet, emailing, and using the Productivity Suite, from the user's primary, non-privileged account.
Use features to detect and block conditions that could lead to or indicate the occurrence of a software exploit. (M1050: Exploit Protection)
o Safeguard 10.5: Enable Anti-Exploit Features: Enable anti-exploit features on enterprise assets and software where possible, such as Microsoft Data Execution Prevention (DEP), Windows Defender Exploit Guard (WDEG) or Apple System Integrity Protection (SIP). and the guard.
Restrict use of certain websites, block downloads/attachments, block JavaScript, restrict browser extensions, etc. (M1021: Restrict web content)
o Backup 9.2: Use DNS Filtering Services: Use DNS filtering services on all company assets to block access to known malicious domains.
o Backup 9.3: Maintain and enforce network-based URL filters: apply and update network-based URL filters to prevent a business asset from connecting to potentially malicious or non-malicious websites approved. Example implementations include category-based filtering, reputation-based filtering, or the use of blocklists. Apply filters for all company assets.
o Backup 9.6: Block unnecessary file types: Block unnecessary file types that attempt to access the company's email gateway.
Block code execution on a system through application control and/or script blocking. (M1038: Prevention of executions)
o Safeguard 2.5: Authorized Software Allowlist: Use technical controls, such as application whitelisting, to ensure that only authorized software can run or be accessed. Reassess every two years or more frequently.
o Backup 2.6: Allowed List of Allowed Libraries: Use technical controls to ensure that only allowed software libraries, such as specific .dll, .ocx, .so, etc. files, are allowed to load into a system process . Prevent unauthorized libraries from loading into a system process. Reassess every two years or more frequently.
o Backup 2.7: Allowed List of Allowed Scripts: Use technical controls, such as digital signatures and version control, to ensure that only allowed scripts, such as specific .ps1, .py, etc. files, are allowed to execute. Block the execution of unauthorized scripts. Reassess every two years or more frequently.
Use features to prevent suspicious behavior patterns from appearing on endpoint systems. This could include a suspicious process, file, API call, etc. (M1040: Endpoint Behavior Prevention)
o Backup 13.2: Deploy a Host-Based Intrusion Detection Solution: Deploy a host-based intrusion detection solution to enterprise assets, where applicable and/or supported.
o Backup 13.7: Deploy a Host-Based Intrusion Prevention Solution: Deploy a host-based intrusion prevention solution to enterprise assets, where applicable and/or supported. Example implementations include using an Endpoint Detection and Response (EDR) client or a host-based IPS agent.
Inform and educate users about the threats posed by hyperlinks contained in emails or attachments, especially from untrusted sources. Remind users not to visit untrustworthy websites or follow links provided by unknown or untrustworthy sources. (M1017: User training)
o Safeguarding 14.1: Establish and maintain a security awareness program: Establish and maintain a security awareness program. The goal of a security awareness program is to educate company personnel on how to interact with company assets and data securely. Organize training upon hiring and, at a minimum, once a year. Review and update the content annually or when significant changes within the business occur that could impact this protection.
o Safeguard 14.2: Train staff members to recognize social engineering attacks: Train staff members to recognize social engineering attacks, such as phishing, pretexting, and tailgating.
