CISA Reveals It Had to Build Its Incident Response Playbook During a Cyberattack

You wouldn’t believe how much the FBI made us rewrite our response to our recent incident. You guys hear all the time from CISA how we have a “playbook.” Well, sometimes the play doesn’t have the same pieces in it when the offense is… what the offense in the last attack was.

It's… unprecedented. – a CISA official quoted in new documentation released last week This snippet, obtained by SC Magazine from new CISA documentation detailing the agency’s response to the widespread Log4Shell attack in late 2021 and early 2022, underscores just how complex the evolving cybersecurity threat landscape has become and why preparation has an expiration date.

For the first time, CISA is revealing what really went on in its incident response efforts - what it got wrong, and how it improvised along the way. "The scale and scope of this vulnerability presented unprecedented challenges," said a CISA spokesperson in a statement released with the documentation. "To ensure we were doing everything possible to secure networks and provide support to our stakeholders, our team developed and adapted new operational procedures as the threat unfolded, based on the real-time threat landscape and evolving understanding of the impact." CISA's incident response playbooks – standard procedure for any major incident management – are detailed, but there is no such playbook that can encompass every potential problem or threat, a problem not unique to CISA, according to cybersecurity professionals.

"Incident response playbooks are essential for providing structure, consistency, and a predictable pathway to navigate an attack," explained Dave Mahon, chief information security officer (CISO) at The US-CERT and US-CYBERCOM during a session on CISA’s latest publication last week.

"However, for any given incident, especially those that involve new methodologies or a wider scope, the playbook is never the complete answer." It also illustrates just how fast the game has changed. Attackers have continued to elevate their techniques, deploying AI, supply chain attacks, sophisticated ransomware campaigns and exploiting cloud infrastructure.

For even seasoned defense organizations, keeping pace with new and emerging tactics requires constant recalibration of defenses, a fact illustrated by this latest report from CISA. "We took away significant lessons from this incident," said a CISA official. " These lessons helped us to develop more effective strategies, update our playbooks and processes, and provide enhanced support and resources to our stakeholders, thereby improving our overall resilience and preparedness for future threats."

And, as Mahon pointed out at last week’s CISA event, a play is only a guide, and in today’s complex world of threats, adaptivity is the key.

"In today's digital age, organizations are constantly bombarded with increasingly sophisticated and innovative threat vectors," Mahon said. " No organization, regardless of its maturity or size, is immune to these threats. While incident response playbooks provide essential structure and guidance, the true measure of an organization's resilience lies in its ability to adapt to unforeseen challenges and evolving threat landscapes, based on new intelligence and operational experience." governments and critical infrastructure organizations across the United States and around the world continue to invest in cyber-defenses. This includes enhancing detection and response capabilities, strengthening threat intelligence, implementing comprehensive training and education, and, of course, regularly reviewing and updating their incident response plans to reflect a continuously changing and increasingly sophisticated array of threats.

In the aftermath of major cyber incidents, such as Log4Shell, organizations that can quickly adapt and develop new responses based on the most up-to-date threat intelligence will be better positioned to protect their assets and maintain business continuity in the face of complex and challenging attacks.

This event shows the vital need for such ongoing preparedness and emphasizes that cybersecurity is not a fixed destination but a dynamic journey.