As a kid, fruit punch always seemed like a magical drink. A mix of orange, cherry, apple, and cranberry created a unique flavor that differed substantially from any one juice. These hybrid drinks not only quenched thirst but their complexity made it difficult to truly recreate them by hand.
Hybrid clouds are the fruit punch of IT environments. These complex, interconnected digital ecosystems consist of on-premises infrastructure and public cloud services. Individually, each has its own flavor of security. With an on-premises infrastructure, organizations own and control everything, but management costs can become prohibitive. The public cloud environment offers reduced costs but takes away some of the control. Hybrid models give organizations a way to gain the benefits of both, yet they introduce different security risks.
To manage hybrid cloud security, organizations need to understand how these environments work and the different cyber threats that cloud technologies bring with them.
What Is Hybrid Cloud Security?
Hybrid cloud security refers to the comprehensive set of policies, procedures, and technologies designed to protect data, applications, and infrastructure spread across a multi-cloud environment that includes:
- Private cloud environments: on-premises data center or private cloud deployments.
- Public cloud services: AWS, Microsoft Azure, Google Cloud.
Hybrid cloud security differs from on-premises or purely public cloud models because it must consider various communication pathways, security models, and management consoles.
To create a unified strategy, organizations need to consolidate the data that these disparate environments generate for consistent policy enforcement and visibility, no matter where workloads reside.
How Does Hybrid Cloud Work?
A hybrid cloud environment integrates an organization’s private cloud infrastructure with public cloud services so the environments can share data and applications. From a technical standpoint, a hybrid cloud deployment manages workloads across multiple environments, typically focusing on:
- Workload placement: Distributing applications and data across private and public clouds while considering data protection requirements and placing scalable workloads in the public cloud.
- Networking and connectivity: Securing connections to transmit data safely between clouds, like using Virtual Private Networks (VPNs), or Software-Defined Wide Area Networks (SD-WAN), or dedicated private links.
- Unified management: Making applications portable across clouds by using management platforms or implementing containers, like Docker and Kubernetes.
- Data integration and synchronization: Maintaining data consistency across environments using APIs, database replication, or ETL pipelines.
- Security and identity management: Centralizing authentication and access controls across clouds, often through identity and access management (IAM), single sign-on (SSO), and role-based access controls (RBAC).
- Monitoring and observability: Maintaining operational visibility and efficiently troubleshooting issues by collecting logs, metrics, and traces from all environments.
- APIs and service meshes: Facilitating communication between microservices across hybrid environments.
What Are The Top Hybrid Cloud Security Challenges?
Hybrid clouds are complex, distributed across multiple, dissimilar, environments. Threat actors often target hybrid cloud environments by looking for weakness across the interconnected private and public cloud resources.
Multi-Cloud Complexity
When each environment has its own security controls, management interfaces, and operational nuances, organizations often have blind spots into their security. This fragmentation can lead to risks like:
- Visibility gaps: Difficulties seeing security events across disparate tools.
- Policy gaps: Exploitable weaknesses arising from Inconsistent security policies across clouds.
- Human error: Mistakes from using multiple interfaces.
Cloud Misconfigurations (APIs, Storage, Permissions)
Misconfigurations are a fundamental security weakness, encompassing various issues like:
- Improperly secured storage buckets.
- Overly permissive access controls.
- APIs with weak authentication, lack or rate limiting, or improper input validation.
Insider threats and identity compromise
In hybrid cloud environments, resources rely on network access, making compromised credentials and malicious insiders a primary security threat. Malicious insiders are often disgruntled employees or contractors who use their access for sabotage or corporate espionage. If threat actors have user credentials, they can:
- Gain unauthorized access for lateral movement across services.
- View, manipulate, or steal sensitive data.
- Escalate privileges to achieve objectives.
Supply Chain and Third-Party Software-as-a-Service (SaaS) Risks
Hybrid cloud architectures often integrate with numerous third-party SaaS applications and services. While they offer various benefits, they introduce supply chain risks like:
- Dependency exposures: Third-party vulnerabilities create unexpected attack vectors in the hybrid environment.
- Access and data sharing: SaaS applications often share data with each other, increasing accidental or malicious data exposure risks.
- Update and patch delays: Vendors are responsible for ensuring their applications are secure, meaning that delayed updates create a security risk for their customers.
Ransomware and Malware
Attackers can leverage vulnerabilities in one part of the hybrid environment to deploy ransomware and malware in other areas. Hybrid environments face risks like:
- Cross-environment propagation: Malware or ransomware moving between public and private cloud workloads.
- Backup and recovery challenges: Dispersed data across hybrid environments making infection isolation and backup restoration more difficult.
- Unpatched vulnerabilities: Threat actors using unpatched or misconfigurations as entry points.
API and Identity Abuse (Tokens, Weak MFA, Sync Exploits)
API abuse is a significant threat vector in hybrid cloud security. Threat actors use weaknesses in APIs and identity systems to gain initial access and establish a foothold. Some primary risks include:
- Token compromise: Using stolen or leaked API tokens for broad access.
- Weak authentication: Lack of multi-factor authentication or weak password policies leaving credentials easily guessable.
- Sync vulnerabilities: Identity or directory synchronization flaws spreading access errors across environments.
Best Practices for Managing Hybrid Cloud Security
As the organization’s attack surface expands with a hybrid cloud infrastructure, the security operations team needs to implement the appropriate controls and monitoring to mitigate the risk of data breaches.
Centralize and Correlate Logs
Collecting and aggregating all cloud and on-premises technology logs provides visibility into the hybrid infrastructure, enabling security teams to detect hidden threats and maintain compliance.
When centralizing and correlating logs, security teams should consider:
- Enriching events by tagging logs with source, user, and geolocation.
- Correlating cross-cloud activity to spot patterns that span environments.
- Keeping audit-ready logs to maintain immutable records for compliance and forensics.
Implement Continuous Threat Detection
Instead of reacting to security incidents after they happen, security teams should continuously monitor for unusual activity that indicates a potential compromise early, reducing overall impact.
When implementing continuous threat detection, organizations should consider:
- Establishing behavioral baselines to flag abnormal API calls or login times.
- Using adaptive alerts to reduce noise and highlight true threats.
- Prioritizing high-risk events to surface the most urgent issues first.
Monitor Identity and Access
By monitoring every user, service account, and API token, security teams can mitigate risks associated with compromised credentials, a primary strategy that threat actors use to move across hybrid cloud environments.
When monitoring identity and access, security teams should consider the following activities:
- Alerting on token misuse to detect exposed or misused API keys.
- Tracking privileged accounts to monitor admin activity across all environments.
- Mapping identities to actions to connect activity to specific users or accounts.
Enable Rapid Incident Response
Rapidly Investigating and responding to threats reduces the potential damage attackers can do and the downtime that the event creates.
To improve incident response times, security teams should consider:
- Centralizing investigations to access all environment data in one console.
- Reconstructing events to track how attacks moved through the hybrid cloud.
- Automating playbooks to trigger alerts or actions based on severity.
Continuously Monitor Compliance
Real-time monitoring of policy and standard adherence reduces compliance risk and demonstrates a strong security posture.
To continuously monitor compliance, security teams should consider:
- Using policy dashboards to track adherence to standards automatically.
- Detecting configuration drift to spot inconsistent controls across clouds.
- Providing executive-ready reporting to share actionable metrics instantly.
Graylog: Strengthen Hybrid Cloud Security and Compliance
Using Graylog, organizations can strengthen hybrid cloud security by leveraging our cloud-native platform, on-prem or hybrid using out-of-the-box integrations to gain immediate visibility across private, public, and multi-cloud environments. Our anomaly detection ML continuously adapts without manual tuning, quickly identifying unusual behavior across workloads, API activity, and user access to help automate threat detection and identity monitoring.
The Graylog purpose-built approach to AI-powered security operations accelerates investigations, reduces human error, and gives teams confidence in their response decisions. With context-rich alerts, threat-smart prioritization, and seamless workflows, security teams cut through noise, reduce alert fatigue, and maintain a clear record of security controls and response actions while supporting compliance and demonstrating effective risk management across complex hybrid infrastructures.
