Security Posture and Threat Detection
In one sentence
What it is
Security posture management continuously inspects your environment for configurations that are dangerous — a publicly readable bucket, an overly permissive firewall rule, a service account with excessive rights, an unencrypted disk — and reports them as findings.
Threat detection is a different activity. It analyses activity rather than configuration, looking for behaviour that suggests something is actively wrong: credentials used from an unexpected location, unusual data access, or a workload behaving like it has been compromised.
Why it matters
Cloud environments drift. Someone opens a firewall rule to debug a problem at midnight and never closes it. A bucket is made public for a demonstration. A broad role is granted temporarily and never revoked. None of these are attacks, and all of them create the conditions for one.
Detection matters because prevention is never complete. Every organisation eventually has an incident; the difference between organisations is how quickly they notice and how well they can reconstruct what happened.
Preventative, detective and responsive controls
| Control type | What it does | Example |
|---|---|---|
| Preventative | Stops the dangerous thing from being possible at all. | An organisation policy that forbids creating publicly accessible storage anywhere in the estate. |
| Detective | Tells you the dangerous thing exists or happened. | A finding reporting a bucket that is publicly readable. |
| Responsive | Acts to contain or remediate. | Automation that removes public access and notifies the owner. |
Audit logs and what each one records
- Admin activity logs — record every change to configuration or metadata. Always on, cannot be disabled, and free of charge. This is your record of who changed what.
- Data access logs — record reads and writes of data itself. Mostly disabled by default because the volume is enormous and it costs money to retain. Must be explicitly enabled for the services where you need it.
- System event logs — record actions the platform takes automatically, such as a live migration.
- Policy denied logs — record when a request was blocked by a security policy, which is often the first signal of a misconfiguration or an attempt.
A very common exam scenario: an investigation needs to know who read a particular file, and the answer is that data access logs must be enabled in advance. Admin activity logs will show who changed the bucket's permissions but not who read its contents.
Running detection and response
- 1Collect — ingest logs and telemetry from cloud, endpoints and network
- 2Normalise — map different sources into a common schema so rules work across them
- 3Detect — evaluate rules and analytics against the normalised data
- 4Triage — assess findings, discard false positives, escalate what matters
- 5Investigate — pivot across entities and reconstruct a timeline
- 6Respond — contain, eradicate, recover, then improve the detection that missed it
Most detection failures trace back to the first two steps rather than the rules. If a log source was never onboarded, or is parsed incorrectly, detections that depend on it silently never fire — and nothing alerts you to the absence.
Common use cases
- Continuously scanning for publicly exposed storage, permissive firewall rules and over-privileged accounts.
- Alerting when an unusual identity accesses sensitive data or a credential is used from a new country.
- Exporting audit logs to long-term storage for compliance retention.
- Building an asset inventory to answer what exists across every project.
- Automating remediation for well-understood findings, such as removing public access from a bucket.
- Reconstructing an incident timeline across identity, network and application logs.
Certification relevance
Where this topic appears, and how deeply each exam goes into it. These are our own assessments based on published exam guides.
- Professional Cloud Security Engineer
The security operations domain: posture management, audit log types, findings triage and incident response.
- Security Operations Engineer
Central to the exam — detection engineering, investigation, response automation and telemetry quality.
- Professional Cloud Architect
Appears as a design requirement for compliance, auditability and operational readiness.
- Cloud Digital Leader
Conceptual: why continuous monitoring exists and what shared responsibility means in practice.
Practice questions
Security practice questions
6 original questions with full explanations.
Related Certifications
Related Cloud Topics
- Identity and Access Management (IAM)Who can do what to which resource: members, roles, policy inheritance, service accounts and least privilege.
- Encryption and Key ManagementDefault encryption, customer-managed keys, rotation and secret handling — and the operational consequences of each choice.
- Monitoring, Logging and ObservabilityMetrics, logs and traces; designing alerts people actually act on; and the SLO vocabulary that reliability work is built around.
- Virtual Private Cloud (VPC)Your private network in the cloud: subnets, routes, firewall rules, peering and shared VPC.