The first quarter of 2026 brought a notable shift in the threat landscape for industrial control systems, with the overall proportion of ICS endpoints that encountered blocked malicious activity falling to 19.6 %. This figure marks the lowest point observed over the last three years and represents a reduction of roughly 30 % compared with the peak recorded in mid‑2023. While the downward trajectory suggests that many organizations are strengthening basic defenses, it also raises questions about visibility: are attackers becoming more stealthy, or are certain threats slipping beneath the radar of conventional detection tools? For security leaders, the decline should be interpreted as a baseline improvement rather than a signal to relax vigilance. Instead, it provides an opportunity to re‑evaluate the effectiveness of current controls, invest in deeper telemetry, and focus on the subsets of the environment where risk remains concentrated. In the sections that follow, we will dissect the regional and sectoral nuances that lie behind the headline number, revealing where the threat surface is still expanding and which attack vectors continue to pose the greatest danger to operational technology.
Geographic disparities remain a defining characteristic of the ICS threat picture. In Q1 2026, the share of industrial computers that blocked malicious objects varied from a modest 9.1 % in Northern Europe to a striking 27.4 % across the African continent. This nearly three‑fold gap underscores the influence of differing regulatory environments, investment levels in cybersecurity, and the prevalence of legacy equipment that may lack modern protective controls. Northern Europe’s low figure can be attributed to mature security programs, widespread adoption of network segmentation, and robust incident‑response capabilities. Conversely, Africa’s higher percentage reflects a combination of rapid digital‑transformation projects in utilities and mining, limited security‑budget allocations, and a higher exposure to internet‑based threats due to reliance on remote connectivity for asset monitoring. Other regions fell somewhere in between, with Southern Europe, Southeast Asia, and Russia showing upward movements during the quarter. Understanding these geographic nuances helps defenders prioritize where to allocate threat‑hunting resources, where to push for stricter baseline standards, and where to consider collaborative initiatives that raise the overall security posture of emerging markets.
Southern Europe emerged as the hotspot for growth in several threat categories during the first three months of 2026. The region recorded the most pronounced increase in both internet‑borne and email‑delivered threats, accompanied by the fastest rise in spyware detections and a steady climb in malicious scripts and phishing pages. Analysts point to a confluence of factors: a resurgence of credential‑harvesting campaigns targeting corporate VPN gateways, an uptick in socially engineered lures that masquerade as routine operational communications, and the continued use of outdated email gateways that lack advanced sandboxing. The surge in spyware is particularly noteworthy because it often precedes more destructive actions, giving attackers a foothold for lateral movement and data exfiltration. For organizations operating in Southern Europe, the data suggest that reinforcing email security controls—such as implementing DMARC, enforcing multi‑factor authentication for remote access, and deploying behavior‑based anomaly detection—can yield immediate risk reduction. Additionally, regular phishing simulation exercises tailored to the specific lures observed in the region can help raise employee awareness and reduce the success rate of credential‑theft attempts.
Russia displayed a distinct pattern in Q1 2026, with the proportion of ICS endpoints that blocked malicious objects surpassing the levels seen in the previous two quarters. The increase was driven primarily by a noticeable rise in threats originating from the open internet, while email‑based threats showed only a modest uptick, making Russia one of the few regions where the email metric did not continue its downward trajectory. This divergence hints at a shifting attacker playbook: threat actors may be favoring direct exploitation of internet‑facing services—such as poorly configured SCADA web interfaces or exposed remote‑desktop gateways—over traditional phishing lures. The slight rise in email threats, however, indicates that classic social‑engineering tactics still have a foothold, possibly because certain sectors within the Russian industrial base continue to rely heavily on email for operational approvals and shift‑handovers. Defenders in Russia should therefore pursue a two‑pronged strategy: harden internet‑exposed assets through rigorous patch management, default‑deny firewall rules, and continuous vulnerability scanning, while simultaneously upgrading email security stacks with advanced threat‑intelligence feeds and attachment‑sanitization capabilities.
Biometric systems consistently topped the list of industrial assets most likely to encounter blocked malware, with a striking 26.4 % of these endpoints registering malicious activity in Q1 2026. Several inherent characteristics make biometric platforms especially attractive to adversaries. First, these systems frequently require direct internet connectivity to synchronize with central identity‑management clouds, download algorithm updates, and push authentication logs. Second, they rely heavily on email exchanges for administrative tasks such as provisioning new credentials, approving access‑request workflows, and distributing audit reports. Third, many organizations that deploy biometric controls treat them as a ‘set‑and‑forget’ security layer, allocating comparatively modest resources to ongoing monitoring, patching, and hardening. The combination of persistent network exposure, high‑value credential data, and relatively lax defensive posture creates a perfect storm for malware operators seeking to harvest biometric templates, steal privileged tokens, or use the system as a pivot point into broader OT networks. To mitigate these risks, organizations should enforce strict network zoning for biometric servers, apply the same rigorous vulnerability‑management cadence used for traditional IT assets, and deploy specialized endpoint detection‑and‑response tools capable of recognizing anomalous authentication patterns.
Although the global trend for blocked malicious objects continued downward, the manufacturing sector bucked the trend in Q1 2026, showing only a modest increase of 1.0 percentage point. This point‑wise rise was recorded across ten different regions, with the most pronounced gains observed in Western Europe, Northern Europe, and Russia. The uptick suggests that attackers are finding new avenues to exploit the growing convergence of information technology and operational technology in modern factories. Contributing factors may include the rapid adoption of edge‑computing gateways that lack hardened operating systems, the increased use of third‑party maintenance contractors who connect temporary laptops to the control network, and the limited visibility into east‑west traffic within many manufacturing cells. For plant managers and OT security teams, the data highlight the importance of implementing application‑whitelisting on engineering workstations, enforcing strict removable‑media controls, and segmenting production networks from corporate IT to limit lateral movement. Additionally, regular red‑team exercises that simulate ransomware or wiper attacks against manufacturing‑specific protocols can uncover gaps before they are exploited in the wild.
Two threat categories showed a reversal of their recent downward trajectories in Q1 2026: denylisted internet resources and AutoCAD‑related malware. After two consecutive quarters of decline, the proportion of ICS endpoints that blocked access to known‑malicious URLs or IP addresses crept back up to 3.54 %, reflecting a resurgence of drive‑by download campaigns and malicious advertising that target industrial users browsing technical documentation or vendor portals. Simultaneously, the detection of malware specifically crafted to infect AutoCAD installations rose slightly to 0.30 %, with Africa experiencing the most dramatic jump—its figure nearly doubled to 0.91 % after a 0.47‑percentage‑point increase. This spike likely stems from targeted campaigns that lure engineers with malicious DWG files or compromised licensing tools, exploiting the trust placed in design software. Organizations should respond by ensuring that web‑proxy solutions are kept up‑to‑date with the latest threat‑intelligence feeds, applying application‑control policies that restrict AutoCAD to trusted sources, and conducting regular audits of third‑party plug‑ins and add‑ons that could serve as infection vectors.
Malicious scripts and phishing pages retained their position as the most frequently blocked threat category in Q1 2026, accounting for an average of 6.56 % of all ICS endpoints worldwide. While this figure represents only a modest fraction of the total threat landscape, its persistence underscores the effectiveness of script‑based delivery mechanisms that can evade signature‑based defenses by employing obfuscation, polymorphism, or living‑off‑the‑land techniques. The most significant regional shift occurred in Southern Europe, where the blocked‑script rate rose by 0.94 percentage points to reach 9.85 %, marking three consecutive quarters of growth. This trend suggests that attackers are refining their use of JavaScript‑laden email attachments, compromised internal wiki pages, and malicious advertising networks that specifically target engineers seeking technical schematics or software updates. To counter this, security teams should invest in browser‑isolation technologies, disable unnecessary scripting engines on OT‑directed workstations, and deploy real‑time URL‑reputation services that can block newly observed malicious domains before they reach the endpoint.
Spyware continued its overall decline, slipping to 3.73 % of ICS endpoints that blocked such activity in Q1 2026, yet it remained the second‑most prevalent threat category for the third quarter in a row. Despite the downward trend, several regions bucked the pattern, most notably Southern Europe (+0.35 pp) and Russia (+0.24 pp), where the blocked‑spyware rate increased. In Southern Europe, the rise was observed across every industry except manufacturing, with biometric systems experiencing the sharpest climb. In Russia, biometric systems again recorded the highest spyware prevalence, while the oil‑and‑gas, engineering‑ICS‑integration, and electric‑power sectors showed steady increases over multiple quarters. This persistent presence of spyware indicates that adversaries are still investing in long‑term reconnaissance, aiming to gather operational schedules, credential material, and topology maps that can later support more destructive actions. Defensive measures should therefore include deploying behavior‑based endpoint monitoring that can detect atypical data‑exfiltration attempts, enforcing least‑privilege access on credential stores, and conducting regular threat‑intelligence hunts focused on known spyware families that target industrial environments.
Ransomware activity against ICS assets reached a historic low in Q1 2026, with only 0.14 % of endpoints blocking such malware—the smallest share recorded across all threat categories. However, the absolute low does not equate to zero risk; the metric ticked upward slightly in North America (Canada) (+0.04 pp) and in Northern Europe (+0.01 pp), indicating that certain niches remain vulnerable. The highest ransomware encounter rates were found in the oil‑and‑gas and manufacturing sectors of Central Asia and the South Caucasus (0.92 % and 0.65 %, respectively) and in biometric systems within Russia (0.89 %). These outliers reveal that attackers continue to perceive high‑value targets where a successful encryption event could halt production, disrupt energy supply, or compromise critical identity infrastructure. For organizations in these sectors, a layered defense is essential: maintain offline, immutable backups of critical configuration files and PLC programs, enforce strict application‑control policies that prevent unsigned executables from running, and segment backup networks from production environments to eliminate the risk of ransomware propagating to backup stores. Regular tabletop exercises that simulate a ransomware scenario involving OT‑specific impacts can also improve readiness and reduce potential downtime.
The landscape for cryptocurrency‑mining malware showed mixed signals in Q1 2026. Traditional Windows‑based miner executables declined to a blocked rate of 0.59 %, yet the metric increased in seven regions, with Africa posting the largest jump (+0.16 pp) driven largely by heightened activity in its manufacturing and oil‑and‑gas industries. Concurrently, web‑based miners—which execute malicious JavaScript in browsers to hijack CPU cycles—continued their year‑long descent, hitting a low of 0.22 % blocked. Despite the overall decline, web‑miner detections rose in South Asia (+0.11 pp), the Middle East (+0.09 pp), and Africa (+0.08 pp), although none of these regional figures surpassed the levels seen in 2023‑2024 or early 2025.5 mining threats, even at lower volumes, highlights attackers’ ongoing effort to monetize compromised OT systems by siphoning computational resources, which can inadvertently degrade controller performance and increase energy consumption. Mitigation strategies include disabling unnecessary browser plugins on OT workstations, enforcing strict outbound‑filtering rules to block known mining pools, and deploying endpoint‑behavior analytics that can detect abnormal CPU‑usage spikes indicative of covert mining processes.
Looking ahead, the Q1 2026 industrial threat report offers several actionable insights for security leaders tasked with protecting OT environments. First, prioritize email security as the leading attack vector for biometric systems and building‑automation platforms; implement DMARC, DKIM, and SPF, coupled with advanced attachment sandboxing and user‑training programs that focus on the specific lures observed in Southern Europe and Russia. Second, maintain rigorous patch‑management and vulnerability‑scanning routines for all internet‑facing OT assets, especially those in electric‑power, construction, and engineering‑ICS‑integration sectors, where threat‑from‑internet rates remain in the double digits. Third, adopt network‑segmentation and zero‑trust principles to isolate high‑risk zones such as biometric servers, PLC programming workstations, and remote‑maintenance portals, thereby limiting lateral movement even if an initial breach occurs. Fourth, leverage behavior‑based detection and threat‑intelligence feeds to catch stealthy threats like spyware and web‑miners that may evade signature‑based tools. Fifth, ensure reliable, offline backups of critical OT configurations and test recovery procedures regularly to reduce the impact of ransomware wipers. By aligning investments with the trends highlighted in this report—particularly the resurgence of internet‑based threats, the persistent danger to biometric systems, and the regional spikes in specific malware families—organizations can build a resilient defense posture that anticipates rather than merely reacts to the evolving industrial threat landscape.