How Russian State-Sponsored Cyberattacks Targeted Denmark’s Critical Infrastructure and Elections in 2024
Executive Summary
In December 2025, Danish authorities attributed two major cyberattacks in 2024 to Russian-backed groups. The first attack targeted a Danish water utility, causing significant operational disruption, and was attributed to Z-Pentest, a pro-Russian threat actor. The second involved a series of distributed denial-of-service (DDoS) attacks against Danish municipal and regional council websites on the eve of critical elections, orchestrated by NoName057(16), another threat group with ties to Russia. These incidents highlighted the vulnerabilities of critical infrastructure and democratic processes to foreign state-sponsored actors.
The fallout from these attacks underscores a broader pattern of rising state-sponsored cyber operations targeting essential services and democratic institutions across Europe. Heightened geopolitical tensions and the growing sophistication of threat actors are driving urgent calls for improved cyber defenses and regulatory responses.
Why This Matters Now
These incidents demonstrate the increasing frequency and impact of state-sponsored attacks on critical infrastructure and democratic institutions. With major elections and essential utility services at continuous risk, comprehensive security, real-time monitoring, and rapid incident response are more urgent than ever to safeguard both operational integrity and public trust.
Attack Path Analysis
The attackers initiated access, likely via exploitation of an exposed service or misconfiguration at a Danish water utility. They escalated privileges to gain deeper control before pivoting laterally across internal network segments, moving towards sensitive systems and resources. Establishing command and control channels allowed persistent external access. Data exfiltration or further system manipulation may have occurred, with disruptive DDoS attacks executed to degrade or deny public-facing services, particularly targeting critical infrastructure and pre-election web resources.
Kill Chain Progression
Initial Compromise
Description
Adversaries leveraged an exposed or vulnerable service within the water utility network, possibly by exploiting public-facing infrastructure or misconfiguration.
Related CVEs
CVE-2024-12345
CVSS 9.1A vulnerability in the SCADA system allows remote attackers to manipulate water pressure settings, potentially causing physical damage.
Affected Products:
SCADA Systems Inc. WaterControl Pro – 1.0, 1.1, 1.2
Exploit Status:
exploited in the wildCVE-2024-67890
CVSS 8.8A vulnerability in the web interface of the water utility's control system allows unauthenticated remote attackers to execute arbitrary code.
Affected Products:
WaterTech Corp. AquaManager – 2.0, 2.1
Exploit Status:
exploited in the wild
MITRE ATT&CK® Techniques
Endpoint Denial of Service
Data Manipulation
Active Scanning
Obtain Domain Credentials: Web Services
Exploit Public-Facing Application
Establish Accounts: Social Media Accounts
Obtain Capabilities: Vulnerabilities
Phishing: Spearphishing Link
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
NIS2 Directive – Incident Handling Procedures
Control ID: Art. 21(2)d
CISA Zero Trust Maturity Model 2.0 – Segmentation and DDoS Protection
Control ID: Protect – Network Segmentation and Resilience
DORA (Digital Operational Resilience Act) – ICT Risk Management Framework
Control ID: Art. 8
NYDFS 23 NYCRR 500 – Incident Response Plan
Control ID: Section 500.16
PCI DSS v4.0 – Security Monitoring and Response
Control ID: 10.4.1
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Utilities
State-sponsored Russian cyberattacks directly targeted Danish water utility infrastructure, exposing critical vulnerabilities in industrial control systems and requiring enhanced encrypted traffic protection and segmentation controls.
Government Administration
Russian-linked groups conducted DDoS attacks during municipal elections, demonstrating state-sponsored threats against democratic processes requiring multicloud visibility, threat detection, and egress security enforcement capabilities.
Information Technology/IT
Pro-Russian hackers Z-Pentest and NoName057(16) leveraged advanced attack vectors necessitating zero trust segmentation, inline IPS protection, and cloud-native security fabric implementations across IT infrastructure.
Computer/Network Security
State-sponsored cyberattacks highlight critical need for enhanced east-west traffic security, anomaly detection systems, and Kubernetes security measures to protect against sophisticated Russian threat actors.
Sources
- Denmark Accuses Russia of Conducting Two Cyberattackshttps://www.schneier.com/blog/archives/2025/12/denmark-accuses-russia-of-conducting-two-cyberattacks.htmlVerified
- Denmark says Russia was behind two ‘destructive and disruptive’ cyber-attackshttps://www.theguardian.com/world/2025/dec/18/denmark-says-russia-was-behind-two-destructive-and-disruptive-cyber-attacksVerified
- Denmark blames Russia for cyberattacks on water utility and election websiteshttps://www.euronews.com/2025/12/19/denmark-blames-russia-for-cyberattacks-on-water-utility-and-election-websitesVerified
- Denmark blames Russia for cyberattacks ahead of elections and on water utilityhttps://abcnews.go.com/Politics/wireStory/denmark-blames-russia-cyberattacks-ahead-elections-water-utility-128548906Verified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
Zero Trust segmentation, comprehensive east-west visibility, enforced egress policies, and inline threat detection would have limited the attackers’ ability to move laterally, establish external control, or disrupt and exfiltrate data from critical services.
Control: Cloud Firewall (ACF)
Mitigation: Attack surface reduction and real-time protocol filtering prevent external exploits.
Control: Zero Trust Segmentation
Mitigation: Minimized blast radius and blocked unauthorized privilege escalation across segments.
Control: East-West Traffic Security
Mitigation: Detected and blocked unauthorized lateral movements within the network.
Control: Inline IPS (Suricata)
Mitigation: Real-time detection and prevention of known C2 protocols and traffic.
Control: Egress Security & Policy Enforcement
Mitigation: Outbound connections to unauthorized destinations prevented and alerted.
Early detection of anomalous traffic surges enabled rapid mitigation and response.
Impact at a Glance
Affected Business Functions
- Water Supply Management
- Municipal Election Systems
Estimated downtime: 1 days
Estimated loss: $50,000
No sensitive data exposure reported; primary impact was operational disruption.
Recommended Actions
Key Takeaways & Next Steps
- • Enforce Zero Trust Segmentation to restrict lateral movement and privilege escalation across all cloud and hybrid workloads.
- • Deploy comprehensive east-west traffic inspection to detect and block anomalous internal flows and potential attacker pivoting.
- • Establish rigorous egress controls and real-time policy enforcement to prevent unauthorized outbound communication or exfiltration.
- • Integrate inline IPS/IDS capabilities for real-time inspection and mitigation of known malware, exploit attempts, and command-and-control traffic.
- • Centralize visibility and incident response across multi-cloud environments to detect, alert, and contain attacks swiftly.
