1. Backup your data, system images, and configurations, regularly test them, and keep the backups offline: Ensure that backups are regularly tested and that they are not connected to the business network, as many ransomware variants try to find and encrypt or delete accessible backups. Maintaining current backups offline is critical because if your network data is encrypted with ransomware, your organization can restore systems.
   
2. Update and patch systems promptly: This includes maintaining the security of operating systems, applications, and firmware, in a timely manner. Consider using a centralized patch management system; use a risk-based assessment strategy to drive your patch management program.
3. Test your incident response plan: There’s nothing that shows the gaps in plans more than testing them. Run through some core questions and use those to build an incident response plan: Are you able to sustain business operations without access to certain systems? For how long? Would you turn off your manufacturing operations if business systems such as billing were offline?
4. Check Your Security Team’s Work: Use a 3rd party (CISA will do this for free) to test the security of your systems and your ability to defend against a sophisticated attack. Many ransomware criminals are aggressive and sophisticated and will find the equivalent of unlocked doors.
5. Segment your networks: There’s been a recent shift in ransomware attacks – from stealing data to disrupting operations. It’s critically important that your corporate business functions and manufacturing/production operations are separated and that you carefully filter and limit internet access to operational networks, identify links between these networks and develop workarounds or manual controls to ensure industrial control networks can be isolated and continue operating if your corporate network is compromised. Regularly test contingency plans such as manual controls so that critical functions can be maintained during a cyber incident.

From Kansas Municipal Utilities - KMU Dispatch - December 22nd, 2020

The Cybersecurity and Infrastructure Security Agency (CISA) is aware of compromises of U.S. government agencies, critical infrastructure entities, and private sector organizations and issued an alert. CISA said that it is aware of active exploitation of a vulnerability in versions of the SolarWinds Orion Platform software, and the agency expects that removing this threat actor from compromised environments will be highly complex and challenging for organizations.

CISA, which falls under the purview of the Department of Homeland Security (DHS), is encouraging affected organizations to read advisories from SolarWinds (https://www.solarwinds.com/securityadvisory) and FireEye (https://www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-leverages-solarwinds-supply-chain-compromises-with-sunburst-backdoor.html) for more information. FireEye is a cybersecurity firm.

In its security advisory, SolarWinds said it was made aware that its systems “experienced a highly sophisticated, manual supply chain attack” on SolarWinds Orion Platform software builds. In the security advisory, SolarWinds offers several steps for parties to take related to use of the SolarWinds Orion Platform.

Meanwhile, DHS on Dec. 13 said that the relevant SolarWinds Orion products are currently being exploited by malicious actors. This tactic permits an attacker to gain access to network traffic management systems, DHS said. Disconnecting affected devices is the only known mitigation measure currently available, it said.

“CISA understands that the vendor is working to provide updated software patches. However, agencies must wait until CISA provides further guidance before using any forthcoming patches to reinstall the SolarWinds Orion software in their enterprise,” DHS said.

Utilities using the SolarWinds Orion platform software should follow the guidance from CISA as additional information becomes available. More information is available from CISA at: https://us-cert.cisa.gov/ncas/alerts/aa20-352a