Governance
Cloud security operations
Assign owners and evidence for exposure changes, cloud server updates, deployment secrets and suspected account compromise.
Cloud security operations turn recurring security work into decisions with named owners and evidence. For each workload, identify who reviews exposure changes, manages server updates, protects deployment credentials and leads a suspected compromise. Give each person a way to see the relevant signal, act on it and record the outcome.
Assign the security work
The division of work depends on the cloud service. A provider may maintain underlying infrastructure while the customer controls application settings, access and software it brings to the cloud. Check the provider’s responsibility documents for each service, then record who operates each control. Include a contractor or managed service provider when one performs the work.
A useful security record names the workload, cloud account, control operator, decision owner and escalation contact. Keep these assignments current when a service or operating arrangement changes. Broader account and workload ownership belongs in the organisation’s governance record.
AWS vs Azure: Key differences for Australian SMEs
- Cloud Provider
- AWS, Azure
- Shared Responsibility Model
- Provider manages infrastructure; customer manages configuration, access and data
- Data Residency in Australia
- Both offer local regions (Sydney, Melbourne) with compliance to Australian privacy laws
Review changes that affect exposure
Watch changes to public entry points, network rules, storage access, administrative permissions and logging. A broadly permitted inbound rule warrants review; it does not alone prove that a service is reachable from the internet. Trace the affected resource, address, route, listener and intended users before deciding what changed.
For a material change, retain its time, actor, resource and approval record. If access is broader than required, agree on a correction with the service owner and check both the unwanted path and the intended application action.
For EC2 exposure findings, AWS Security Hub lists the affected instance and identifying information in the finding’s Resources section. Resource details can also be retrieved programmatically with the Security Hub CSPM API’s GetFindingsV2 operation.
If an affected resource is not needed, deleting it can reduce the exposure profile and AWS costs. For an essential resource, classify the finding’s misconfiguration, reachability, vulnerability and impact traits, then choose remediation that suits the workload and organisational requirements. One finding can contain issues across several remediation topics, and addressing one topic can lower its severity.
Remediation process for EC2 instance exposure
- Identify exposed instanceFrom AWS Security Hub finding in Resources section
- Classify misconfigurationDetermine reachability, vulnerability, impact, and risk level
- Choose remediationDelete unused resource or adjust permissions
- Verify fixConfirm no longer publicly accessible via API or console
- Update recordsLog change, owner, date, and validation result
Keep guest systems current
For cloud servers your organisation operates, maintain an inventory of operating systems, support status, update sources and patch owners. Prioritise available fixes using exposure, vendor information and applicable organisational requirements. A scheduled job does not establish that every machine was assessed, updated and returned to useful service.
Plan for restarts and faults. An update tool may have no direct rollback, so the workload needs a suitable recovery path.
Protect deployment credentials
Deployment files can identify where a workload obtains a secret without containing its value. Use a supported workload identity where it fits. If a secret remains necessary, restrict its storage and retrieval, and name the person who can replace it.
Scan proposed changes, while recognising that scanners have coverage and configuration limits. If a real credential is committed, coordinate its revocation or rotation and update dependent workloads. Removing a line from the current file does not retire the credential.
Escalate suspected compromise
Give operators a route to the incident owner when activity suggests account compromise. The first handoff should distinguish observed events from conclusions, identify the account and likely business impact, and preserve available evidence. The incident owner chooses containment with the risk of further activity and service disruption in view.
Steps to respond to a suspected cloud compromise
- Identify the account and affected resourcesUse logs or monitoring tools to trace activity
- Preserve evidenceDo not alter logs or system state until reviewed
- Escalate to incident ownerFollow predefined escalation path with clear context
- Contain and assess impactBalance risk of disruption against threat severity
- Report if requiredNotify ATO under Notifiable Data Breaches (NDB) scheme if personal information is involved
Review outcomes
At an operating review, ask whether material exposure changes were explained, overdue updates have owners, credentials have a replacement path and suspected incidents reached the right people. Record exceptions with an owner and next decision date. When a security change is made, record the checks actually performed and their results.
Cloud security operations checklist
- Assign ownership for each controlInclude contractors and MSPs where applicable
- Review all public-facing changesCheck network rules, storage access, admin permissions
- Maintain current guest OS patchesTrack support status and update sources
- Protect deployment credentialsUse workload identities; restrict secret access
- Document incident escalationsRecord time, actor, action and outcome
In this guide
- Reviewing configuration changes that expose servicesTrace a cloud access change to its affected service, assess reachability and record the correction and checks.
- Managing operating system updates for cloud servers: 4 stepsPlan cloud server patch priorities and deployment waves, then verify application health and track skipped or failed machines.
- Keeping secrets out of deployment files: checks & responseKeep credential values out of deployment files, review leak paths and respond if a real secret is committed.
- Escalating a suspected cloud account compromiseHandoff a suspected cloud account compromise, preserve available evidence and coordinate containment and reporting decisions.
