TO: Corporate Executives and Business Leaders
FROM: Anne Neuberger, Deputy Assistant to the President and Deputy National
Security Advisor for Cyber and Emerging Technology
SUBJECT: What We Urge You To Do To Protect Against The Threat of Ransomware
DATE: June 2, 2021
The number and size of ransomware incidents have increased significantly, andstrengthening our nation’s resilience from cyberattacks – both private and public sector– is a top priority of the President’s.
Under President Biden’s leadership, the Federal Government is stepping up to do its’part, working with like-minded partners around the world to disrupt and deter
ransomware actors. These efforts include disrupting ransomware networks, working
with international partners to hold countries that harbor ransomware actors accountable,
developing cohesive and consistent policies towards ransom payments and enabling
rapid tracing and interdiction of virtual currency proceeds.
The private sector also has a critical responsibility to protect against these threats. All
organizations must recognize that no company is safe from being targeted byransomware, regardless of size or location. But there are immediate steps you can taketo protect yourself, as well as your customers and the broader economy. Much as ourhomes have locks and alarm systems and our office buildings have guards and security
to meet the threat of theft, we urge you to take ransomware crime seriously and ensure
your corporate cyber defenses match the threat.
The most important takeaway from the recent spate of ransomware attacks on U.S.,
Irish, German and other organizations around the world is that companies that view
ransomware as a threat to their core business operations rather than a simple risk ofdata theft will react and recover more effectively. To understand your risk, businessexecutives should immediately convene their leadership teams to discuss theransomware threat and review corporate security posture and business continuity plansto ensure you have the ability to continue or quickly restore operations.

Below you will find the U.S. Government’s recommended best practices – we’ve
selected a small number of highly impactful steps to help you focus and make rapid
progress on driving down risk.
What We Urge You To Do NowImplement the five best practices from the President’s Executive Order:
President Biden’s Improving the Nation’s Cybersecurity Executive Order is being
implemented with speed and urgency across the Federal Government. We’releading by example because these five best practices are high impact: multifactor
authentication (because passwords alone are routinely compromised), endpoint
detection & response (to hunt for malicious activity on a network and block it),encryption (so if data is stolen, it is unusable) and a skilled, empowered security
team (to patch rapidly, and share and incorporate threat information in yourdefenses). These practices will significantly reduce the risk of a successful cyberattack.
Backup your data, system images, and configurations, regularly test them,and keep the backups offline: Ensure that backups are regularly tested andthat 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 withransomware, your organization can restore systems.
Update and patch systems promptly: This includes maintaining the security ofoperating 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.
Test your incident response plan: There’s nothing that shows the gaps inplans more than testing them. Run through some core questions and use thoseto build an incident response plan: Are you able to sustain business operations
without access to certain systems? For how long? Would you turn off yourmanufacturing operations if business systems such as billing were offline?
Check Your Security Team’s Work: Use a 3rd party pen tester 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 theequivalent of unlocked doors.
Segment your networks: There’s been a recent shift in ransomware attacks –from stealing data to disrupting operations. It’s critically important that yourcorporate business functions and manufacturing/production operations areseparated 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 ICS networks can be isolated and continue operating if

your corporate network is compromised. Regularly test contingency plans suchas manual controls so that safety critical functions can be maintained during acyber incident.
Ransomware attacks have disrupted organizations around the world, from hospitals
across Ireland, Germany and France, to pipelines in the United States and banks in theU.K. The threats are serious and they are increasing. We urge you to take these criticalsteps to protect your organizations and the American public. The U.S. Government isworking with countries around the world to hold ransomware actors and the countries
who harbor them accountable, but we cannot fight the threat posed by ransomware
alone. The private sector has a distinct and key responsibility. The federal government
stands ready to help you implement these best practices.
Additional Resources
FACT SHEET: President Signs Executive Order Charting New Course to Improve theNation’s Cybersecurity and Protect Federal Government Networks
CISA - RANSOMWARE GUIDANCE AND RESOURCES