When a Cyber Attack Hits: The COO's 72-Hour Operations Response Playbook

The COO's lane in a cyber incident

When a cyber attack is confirmed, most organizations activate their IT incident response plan. Containment begins. The CISO directs forensics. Systems are isolated. Legal is notified. This sequence is well-documented and, increasingly, well-rehearsed.

The operational layer — who owns it, what the plan is, when it activates — is rarely written down at all.

The COO's role in a cyber incident is not to contain the breach. That belongs to the CISO and security team. The COO's role is to assess and sustain the operational layer that the breach is now threatening: which processes still function, which ones have failed, what customer commitments are at risk, which vendors need to be notified, and what manual or alternative procedures can be activated while systems are compromised.

These two response tracks must run in parallel. The security team's containment window — typically 24 to 72 hours — is the same window in which operational damage accumulates if no one is managing it. Customer deliverables slip. Vendor-dependent workflows break. Teams default to informal workarounds with no documentation. The COO's 72-hour playbook is the structure that keeps that window from becoming an operational casualty in addition to a security event.

Hours 0–24: Operational triage

The first 24 hours are about assessment, not recovery. The question is not "how do we fix this?" — it's "what is still working and what is not?" That distinction matters because premature recovery efforts on compromised systems can interfere with the security team's containment and forensic work.

The operational triage in this window covers four areas:

• Process status assessment. Which operational workflows are affected? For each critical process, determine whether it is fully functional, degraded but running, or offline. This requires knowing which processes depend on which systems — the kind of dependency map that most organizations don't have until they need it. Operational resilience work done in advance — mapping which processes depend on which systems and which people — is what makes this assessment take hours instead of days.
• AI-dependent process identification. Organizations increasingly rely on AI tools for operational workflows: scheduling, communication, document processing, compliance monitoring. When primary systems are compromised, AI-assisted processes are often the first to fail. Identify which workflows depend on AI tools that are now inaccessible and designate manual fallback procedures for each.
• Customer commitment review. Pull the list of active customer commitments with deadlines falling in the next 72 hours. Which are at risk given the process outages identified above? These are the relationships that require proactive communication in this window — not a mass notification, but targeted outreach to customers whose specific deliverables are threatened.
• Decision log activation. Open a running log — offline-accessible, on paper if necessary — that captures every operational decision made during the incident: who decided, what was decided, why, and when. This log serves three purposes simultaneously: it coordinates the response team, it provides evidence for post-incident review, and it creates the documentation chain that legal, insurers, and regulators will request after the event.

Hours 24–48: Communication and manual fallbacks

By the second day, the security team's containment status should be clearer. The COO's focus shifts from assessment to communication and operational substitution — keeping the business running in degraded mode while recovery proceeds.

Vendor notification. Review the vendor contact list and identify which vendors need to be notified. This is not about disclosure of security details — that is the CISO's domain. It is about operational implications: are there vendor-managed processes that have been interrupted? Are there automated payment or ordering workflows that have stopped? Vendor relationships with active task dependencies or upcoming contractual milestones need direct contact, not a generic incident notice.

Most organizations discover their vendor contact list is either out of date or lives only in a system that is currently inaccessible. The operational dependency on current vendor contact information — offline-accessible, version-controlled, with named account contacts rather than generic support addresses — is a gap that becomes critical exactly at this moment.

Customer communication sequencing. Outbound customer communication should be staged by impact severity, not sent as a single mass notification. Customers whose deliverables are directly at risk receive direct, honest communication with specific updated timelines or alternative arrangements. Customers with no immediate deliverable at risk receive a holding communication. The COO drafts and sequences this communication; legal reviews it; the CISO confirms what can and cannot be disclosed about the incident's nature.

Manual fallback activation. For each critical process identified as offline in hours 0–24, activate the documented manual alternative. This requires those alternatives to exist. In the absence of documented fallbacks, teams improvise — creating informal workarounds that are often inconsistent, undocumented, and difficult to wind back once systems are restored. The organizations that manage cyber incidents with the least operational damage are almost always the ones that invested in documented process ownership and manual alternatives before the event.

Hours 48–72: Recovery sequencing and decision log closure

The third day is about transition from incident response back toward normal operations — but not all at once, and not without a plan.

Recovery sequencing. As the security team clears systems for restoration, work with them to sequence operational recovery in priority order. Not everything comes back at once, and the order matters. Critical customer-facing processes come first. High-stakes compliance workflows with imminent deadlines come next. Lower-priority administrative processes restore last. This sequencing should be documented, approved by both the CISO and the COO, and communicated to the teams operating manual fallbacks so they know when to hand back to digital workflows.

Staff communication. Operations teams operating manual fallbacks for 48-72 hours are fatigued and often confused about what is expected of them. Clear, direct communication about the recovery sequence — which systems are coming back, in what order, with what timelines — reduces improvisation errors that create additional cleanup work after the incident closes.

Decision log closure and handoff. The 72-hour decision log is not an internal document to be filed and forgotten. It is the operational record of how the organization responded. Close it formally at the end of the 72-hour window with a summary of decisions made, outcomes documented, and open items identified. Hand it to legal, the CISO, and relevant stakeholders. It will become the foundation of the post-incident review and any regulatory or insurance documentation required.

The operational infrastructure that makes this possible

The organizations that manage cyber incidents with minimal operational damage have one thing in common: they built the infrastructure for response before it was needed. The 72-hour playbook only works if certain operational records are accessible when primary systems are compromised.

Four specific infrastructure elements determine whether an operational response is possible in hours or improvised over days:

• Offline-accessible process ownership records. When your operational system is compromised, the list of who owns which process needs to be retrievable without logging into that system. Process ownership records — which person is responsible for which workflow, who the backup owner is, what the manual alternative is — should have an offline or out-of-band access path. A quarterly export, a printed reference document, or access through a secondary system that doesn't share infrastructure with primary operations is sufficient.
• Vendor contact chains with named individuals. A vendor support email is not a contact chain. An incident-ready contact chain includes the name, mobile number, and account relationship of the specific person at each critical vendor who can act on urgent operational issues. This contact list needs to be current, version-controlled, and accessible when primary systems are down.
• Documented manual fallback procedures. For each AI-dependent or system-dependent critical workflow, a manual alternative must exist and be documented well enough that someone other than the process expert can execute it. This documentation is the same work that supports general operational resilience — it's not cyber-specific, but a cyber incident is when its absence is most consequential.
• A pre-designated decision authority chain. In a cyber incident, the normal organizational decision-making infrastructure may be compromised or unavailable. Who has authority to commit resources, issue customer communications, authorize vendor contact, or suspend normal operational procedures? This decision authority chain — named individuals with specific scopes of authority — should be documented, communicated, and tested before an incident requires it.

None of these elements requires specialized security tooling. They are operational records of the kind that a structured operations platform surfaces as a byproduct of normal operations management. The task ownership history, the vendor contact associations, and the documented process sequences that accumulate in the course of running the business are the same records that make incident response possible.

CISO-COO coordination: the handoff points that matter

The most common failure mode in cyber incident response is not poor security work or poor operations work — it is inadequate coordination between the two tracks. The security team's decisions affect operational timelines. The operational team's communication decisions affect the security team's investigation. The two tracks need defined handoff points, not ad-hoc coordination.

Three handoff points require explicit agreement before the response begins:

1. System isolation vs. operational continuity. The CISO will isolate affected systems. Some of those systems support critical operational workflows. The decision to isolate a system with an active customer-facing dependency is a joint decision, not a unilateral security call. The COO's role in this handoff is to surface the operational consequence of each isolation decision so the security team can weigh it accurately — not to slow containment, but to ensure the operational damage of containment decisions is understood and accepted.
2. External communication approval. The COO drafts and sequences customer and vendor communications. The CISO approves them for consistency with incident disclosure guidance and legal clearance. This approval loop must be fast — measured in hours, not days — or customer communication defaults to no communication, which is almost always worse for the relationship than imperfect disclosure.
3. Recovery authorization. As systems are cleared for restoration, the CISO authorizes return to operation. The COO sequences operational recovery based on that authorization. This is a two-key decision: security clearance plus operational prioritization. Neither team can sequence recovery effectively without the other's input.

Organizations that have defined these handoff points in advance — ideally tested in a tabletop exercise — consistently recover faster and with less collateral operational damage than those that improvise the coordination during the event itself.

If you want to understand how Sintris helps operations teams maintain accessible process ownership records and documented workflows that support cyber incident response, talk to the team or explore the platform.