Japan’s 2024 Ransomware Surge: How Long-Tail Attacks Crippled Key Sectors
Executive Summary
In early 2024, a wave of ransomware attacks swept through major Japanese organizations, targeting manufacturers, retailers, and segments of the Japanese government. Threat actors exploited vulnerable remote access points and unpatched software, using techniques such as lateral movement and data exfiltration before deploying ransomware payloads that encrypted business-critical systems. The operational disruption was immediate—many impacted organizations required months for full recovery, facing prolonged outages, loss of proprietary data, customer service challenges, and significant reputational harm. The attacks demonstrated sophisticated attacker persistence and exposed deficiencies in traffic segmentation and visibility into east-west movements within enterprise networks.
This incident underscores the sophistication and persistence of modern ransomware operators in targeting essential sectors. As ransomware actors increasingly leverage stealthy, multi-stage attacks, organizations globally must reassess their east-west traffic security, incident response, and data protection programs to guard against extended, damaging outages.
Why This Matters Now
Ransomware attacks in Japan demonstrate increasing attacker dwell time and the difficulty of post-breach recovery, revealing critical gaps in network segmentation and incident response. The evolving threat landscape places urgent pressure on organizations to modernize defense strategies, prioritize east-west threat detection, and implement resilient recovery practices.
Attack Path Analysis
Attackers gained initial access to Japanese organizations using either phishing or exploitation of exposed services. They escalated privileges to gain broader access within cloud or on-prem environments, potentially manipulating IAM roles or service accounts. Next, they laterally moved within networks, leveraging east-west connectivity to reach critical assets and workloads. Establishing command and control channels allowed persistent communication and remote operation of ransomware tools. Data was exfiltrated through covert channels or legitimate application flows before ransomware was detonated, encrypting files and causing operational disruptions that took months to recover.
Kill Chain Progression
Initial Compromise
Description
Attackers penetrated initial defenses via phishing or exploiting exposed cloud services or misconfigurations.
Related CVEs
CVE-2024-40766
CVSS 9.6A critical vulnerability in SonicWall SonicOS allows unauthenticated remote attackers to execute arbitrary code.
Affected Products:
SonicWall SonicOS – Gen 5, Gen 6, Gen 7
Exploit Status:
exploited in the wildCVE-2023-27532
CVSS 7.5A vulnerability in Veeam Backup & Replication allows unauthenticated users to access backup infrastructure hosts.
Affected Products:
Veeam Backup & Replication – < 11.0.1.1261
Exploit Status:
exploited in the wildCVE-2024-40711
CVSS 9.8A vulnerability in Veeam Backup & Replication allows remote code execution via the Veeam Distribution Service.
Affected Products:
Veeam Backup & Replication – < 12.0.0.1420
Exploit Status:
exploited in the wild
MITRE ATT&CK® Techniques
Phishing
Valid Accounts
Command and Scripting Interpreter
Data Encrypted for Impact
Data Manipulation: Stored Data Manipulation
Windows Management Instrumentation
Obfuscated Files or Information
Exfiltration Over C2 Channel
Potential Compliance Exposure
Mapping incident impact across multiple compliance frameworks.
PCI DSS 4.0 – Maintain and Test Incident Response Plan
Control ID: 10.7.2
NYDFS 23 NYCRR 500 – Cybersecurity Event Response and Notification
Control ID: Section 500.15
DORA – ICT Risk Management Framework
Control ID: Article 10
CISA ZTMM 2.0 – Robust Authentication and Least Privilege
Control ID: Identity Pillar: Authenticate, Authorize, and Verify
NIS2 Directive – Implementation of Technical and Organizational Measures
Control ID: Article 21
Sector Implications
Industry-specific impact of the vulnerabilities, including operational, regulatory, and cloud security risks.
Automotive
Manufacturing operations face extended ransomware recovery periods, requiring robust east-west traffic security and zero trust segmentation to prevent lateral movement across production systems.
Retail Industry
Retail systems vulnerable to ransomware attacks targeting customer data and payment processing, necessitating egress security controls and multicloud visibility for comprehensive protection.
Government Administration
Government entities experiencing prolonged ransomware impact requiring enhanced threat detection capabilities and encrypted traffic solutions to protect sensitive administrative data and citizen services.
Computer Software/Engineering
Software organizations need cloud native security fabric and Kubernetes security controls to protect development environments from ransomware targeting intellectual property and source code.
Sources
- Japanese Firms Suffer Long Tail of Ransomware Damagehttps://www.darkreading.com/cyberattacks-data-breaches/japanese-firms-suffer-long-tail-ransomware-damageVerified
- Muji halts online sales after ransomware attack on supplierhttps://www.techradar.com/pro/security/muji-halts-online-sales-after-ransomware-attack-on-supplierVerified
- Asahi stops pouring after cyberattack stops productionhttps://www.techradar.com/pro/security/asahi-stops-pouring-after-cyberattack-stops-productionVerified
- Cyberattack hits major Japanese beverage producer, affecting its operationshttps://apnews.com/article/e8854524dcd02eee4aa9e3d65464d019Verified
Frequently Asked Questions
Cloud Native Security Fabric Mitigations and ControlsCNSF
Zero Trust segmentation, east-west traffic controls, and robust egress enforcement would have significantly disrupted each phase of the ransomware attack by containing lateral movement, restricting data exfiltration, and providing early detection and response. CNSF capabilities such as workload microsegmentation, centralized visibility, inline IPS, and enforced encryption directly align with preventing and limiting these attack paths.
Control: Cloud Firewall (ACF)
Mitigation: Reduces attack surface by controlling exposure of critical services and filtering malicious inbound traffic.
Control: Multicloud Visibility & Control
Mitigation: Detects anomalous privilege use and provides centralized oversight of role assignment changes.
Control: Zero Trust Segmentation
Mitigation: Prevents unauthorized east-west movement by enforcing least-privilege communication between workloads.
Control: Inline IPS (Suricata)
Mitigation: Blocks known C2 traffic and detects signature-based exploit attempts.
Control: Egress Security & Policy Enforcement
Mitigation: Prevents unauthorized data exfiltration by enforcing strict network egress policies and FQDN filtering.
Enables rapid detection of ransomware execution and anomalous encryption behaviors to facilitate containment.
Impact at a Glance
Affected Business Functions
- Online Sales
- Order Processing
- Customer Service
Estimated downtime: 30 days
Estimated loss: $5,000,000
Potential exposure of customer personal information, including names, addresses, and financial data.
Recommended Actions
Key Takeaways & Next Steps
- • Enforce Zero Trust segmentation and east-west security to block lateral movement across cloud and on-prem workloads.
- • Deploy cloud-native firewalling and inline IPS to protect against inbound exploits and command-and-control communications.
- • Implement centralized egress filtering and FQDN controls to prevent data exfiltration and unauthorized outbound access.
- • Maintain continuous visibility, centralized logging, and anomaly detection to identify and respond to privilege escalations or ransomware behaviors in real-time.
- • Regularly audit and refine IAM roles and permissions, ensuring least privilege and detecting misconfigurations across hybrid and multi-cloud environments.
