Topic starter
11/07/2026 8:23 pm
TL;DR: Ransomware groups are using lateral movement to turn single footholds into enterprise-wide disruption, with 4,848 publicly posted victims in 2024 and a reported $22 million demand in one pharmaceutical case, according to Elisity and the GRIT Ransomware Report. The control problem is no longer detection alone; it is constraining east-west trust before attackers can traverse the environment.
Editorial analysis by NHI Mgmt Group, based on content published by Elisity: “The Hidden Highway: How Ransomware Groups Are Exploiting Lateral Movement to Devastate Critical Infrastructure in 2025”.
By the numbers:
- Ransomware incidents reached over 4,848 publicly posted victims in 2024, according to Elisity.
Key questions
Q: What breaks when ransomware can move laterally after one endpoint is compromised?
A: Containment breaks, because one compromised identity can reach the systems that keep the business running.
Q: Why does lateral movement make ransomware more dangerous in complex environments?
A: Lateral movement turns one compromised endpoint or credential into a pathway toward higher value systems.
Q: What are the signs that east-west controls are failing?
A: Warning signs include admin tools appearing in non-admin workflows, accounts reaching far more systems than normal, and movement from one zone to another without a clear business reason.
Practitioner guidance
- Implement east-west segmentation around crown jewel systems Separate user workstations, servers, backups, and operational systems so a single compromised asset cannot move laterally into critical workloads.
- Tighten remote administration pathways Restrict RDP, PowerShell remoting, WMI, and remote support tools to approved admin devices, approved accounts, and approved maintenance windows.
- Reduce trust in service and automation accounts Audit non-human identities that can reach multiple zones and remove standing access that is not required for a specific workload or maintenance function.
Bottom line: Ransomware impact is increasingly determined by how far attackers can move internally after the first compromise.
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11/07/2026 8:53 pm
Lateral movement has become the real ransomware control gap: the decisive failure is no longer just initial compromise, but internal trust that allows one foothold to become domain-wide reach. Once adversaries can use valid tools and accepted access paths, detection alone arrives too late to contain the blast radius. The governance problem is therefore east-west trust, not only malware hygiene, and practitioners should treat internal access boundaries as the primary control surface.
A few things that frame the scale:
- 82% of detections were malware-free, with attackers using valid credentials and trusted tools, according to CrowdStrike's 2026 Global Threat Report.
A question worth separating out:
A: Security teams should assume some intrusions will succeed and focus on containing movement. The practical priority is microsegmentation and Zero Trust Segmentation, so compromised systems cannot easily reach other workloads, identity stores, or critical services. That approach limits blast radius, buys time for response, and reduces the chance that a single foothold becomes a broad operational outage.
👉 Read our full editorial: Ransomware lateral movement is the real critical infrastructure risk