Hamilton’s Ransomware Attack Highlights Cyber Insurance Gaps and Rising Security Standards
In February 2024, the City of Hamilton, Ontario, suffered a city-wide ransomware attack, with attackers demanding $18.5 million. The city refused to pay and restored critical services within 48 hours, though some disruptions persisted for weeks. A year later, the city’s cyber insurance claim was denied after an investigation revealed that multiple departments had failed to implement multi-factor authentication (MFA), a basic security requirement under the policy.
The incident underscores a broader trend: cyber insurers are tightening underwriting standards, often denying claims when organizations neglect foundational security measures. According to Palo Alto Networks’ 2026 Global Incident Response Report, over 90% of breaches stem from preventable gaps such as poor visibility, excessive trust in identities, and inconsistent controls rather than sophisticated attacks. These lapses enable attackers to move laterally within systems, amplifying damage.
The rise of AI-driven threats has further reshaped the cyber insurance landscape. Tools like Anthropic’s Mythos model and generative AI have lowered the barrier for attackers, enabling large-scale phishing and automated breaches. In response, insurers are shifting from passive underwriting to proactive security audits, requiring clients to meet baseline protections such as MFA, endpoint detection and response (EDR), and regular patching to qualify for coverage. The U.S. cyber insurance market saw a 34% increase in policy purchases in 2025, driven by growing awareness of financial risks from cyber incidents.
Despite stricter requirements, many claims still fail due to policy violations. Coalition’s 2026 Cyber Claims Report found that business email compromise (BEC) accounted for 31% of all claims in 2025, while Arctic Wolf’s 2025 Cyber Insurance Outlook revealed that 25% of denied claims resulted from unmet policy terms, 17% from undisclosed risks, and 16% from gross negligence. Insurers now conduct external vulnerability scans and assess employee training programs, as human error remains a leading cause of breaches.
The Hamilton case also highlights the limitations of traditional defenses like firewalls. A 2025 FireMon report found that 60% of enterprise firewalls failed high-severity compliance checks, and 34% failed critical security evaluations. While firewalls reduce risk, they cannot address misconfigurations, zero-day exploits, or insider threats leaving organizations exposed to financial, legal, and reputational fallout.
Cyber insurance now serves as both a financial safety net and a driver of security maturity. Insurers increasingly partner with cybersecurity firms, with 69% offering in-house risk management services, per Arctic Wolf’s report. Policies often include access to forensic teams, legal support, and ransom negotiation services, helping organizations recover faster. However, eligibility hinges on meeting evolving standards, such as 24/7 security operations centers (SOCs) or managed detection and response (MDR) solutions.
For small and medium enterprises (SMEs), insurers are setting minimum security benchmarks, accelerating the adoption of baseline controls. As Kawin Boonyapredee, CISO advisor at KnowBe4, noted, insurer requirements have made security investments mandatory, shortening procurement cycles and raising industry-wide maturity. Firms that fail to comply face higher premiums, limited coverage, or outright ineligibility reinforcing that cyber insurance is no longer a substitute for proactive security.
Source: https://www.spiceworks.com/security/how-cyber-insurers-became-the-new-security-auditors/
City Of Hamilton cybersecurity rating report: https://www.rankiteo.com/company/city-of-hamilton
"id": "CIT1778683361",
"linkid": "city-of-hamilton",
"type": "Ransomware",
"date": "2/2024",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"{'affected_entities': [{'industry': 'public sector',
'location': 'Ontario, Canada',
'name': 'City of Hamilton',
'type': 'government'}],
'data_breach': {'data_encryption': 'yes'},
'date_detected': '2024-02',
'description': 'In February 2024, the City of Hamilton, Ontario, suffered a '
'city-wide ransomware attack, with attackers demanding $18.5 '
'million. The city refused to pay and restored critical '
'services within 48 hours, though some disruptions persisted '
'for weeks. A year later, the city’s cyber insurance claim was '
'denied after an investigation revealed that multiple '
'departments had failed to implement multi-factor '
'authentication (MFA), a basic security requirement under the '
'policy.',
'impact': {'downtime': 'some disruptions persisted for weeks',
'operational_impact': 'critical services restored within 48 hours',
'systems_affected': 'city-wide systems'},
'lessons_learned': 'Cyber insurers are tightening underwriting standards, '
'often denying claims when organizations neglect '
'foundational security measures like MFA. The incident '
'highlights the importance of meeting baseline security '
'requirements to qualify for cyber insurance coverage.',
'motivation': 'financial gain',
'post_incident_analysis': {'corrective_actions': 'Implementation of MFA, '
'enhanced monitoring, and '
'proactive security audits',
'root_causes': 'Failure to implement multi-factor '
'authentication (MFA), poor '
'visibility, excessive trust in '
'identities, and inconsistent '
'controls'},
'ransomware': {'data_encryption': 'yes',
'ransom_demanded': '$18.5 million',
'ransom_paid': 'no'},
'recommendations': ['Implement multi-factor authentication (MFA) across all '
'departments',
'Adopt endpoint detection and response (EDR) solutions',
'Ensure regular patching and vulnerability management',
'Conduct external vulnerability scans and security audits',
'Invest in 24/7 security operations centers (SOCs) or '
'managed detection and response (MDR) solutions',
'Provide employee training to reduce human error',
'Meet evolving cyber insurance standards to maintain '
'coverage eligibility'],
'references': [{'source': 'Palo Alto Networks’ 2026 Global Incident Response '
'Report'},
{'source': 'Coalition’s 2026 Cyber Claims Report'},
{'source': 'Arctic Wolf’s 2025 Cyber Insurance Outlook'},
{'source': 'FireMon’s 2025 Report'}],
'response': {'remediation_measures': 'restored critical services'},
'title': 'Hamilton’s Ransomware Attack',
'type': 'ransomware',
'vulnerability_exploited': 'lack of multi-factor authentication (MFA)'}