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  1. Services
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  3. SIEM monitoring

Managed security

SIEM monitoring

We collect and correlate your security events, triage what matters, and tune the rules so you get signal instead of noise.

Scope a test Call 1300 AURIAN

Who this is for

  • You collect logs but nobody watches them

    A SIEM that no one triages is a cost, not a control. You want events correlated and acted on, not just stored.

  • You need visibility across a spread-out estate

    Network, endpoints, cloud and identity each tell part of the story. Correlation across them turns scattered events into a picture.

  • You want alerts that mean something

    Untuned rules bury the real signal in noise. You want prioritised, context-rich alerts, and someone tuning them over time.

What our SIEM monitoring covers

Internet Web application API Perimeter Cloud tenancy Email Office network Workstation Identity Wireless Crown jewels Servers INTERNET: NOT IN SCOPE HERE Covered by external network penetration testing. Click to open that service. WEB APPLICATION: NOT IN SCOPE HERE Covered by web application penetration testing. Click to open that service. API: NOT IN SCOPE HERE Covered by API penetration testing. Click to open that service. PERIMETER: NOT IN SCOPE HERE Covered by external network penetration testing. Click to open that service. CLOUD TENANCY: CHECKS INCLUDE Cloud audit log collection Configuration and privilege changes EMAIL: CHECKS INCLUDE Mailbox rule and sign-in correlation Impossible-travel and legacy authentication alerts OFFICE NETWORK: CHECKS INCLUDE Network event collection and correlation Lateral movement across hosts WORKSTATION: CHECKS INCLUDE Endpoint event collection Suspicious process and script activity IDENTITY: CHECKS INCLUDE Sign-in, privilege and account-change detection Multi-factor fatigue and account takeover WIRELESS: NOT IN SCOPE HERE Covered by wireless penetration testing. Click to open that service. CROWN JEWELS: NOT IN SCOPE HERE Covered by internal network penetration testing. Click to open that service. SERVERS: CHECKS INCLUDE Server and application log correlation Administrative activity outside normal patterns Internet Web application Perimeter API Email Cloud tenancy Office network Workstation Wireless Identity Crown jewels Servers INTERNET: NOT IN SCOPE HERE Covered by external network penetration testing. Click to open that service. WEB APPLICATION: NOT IN SCOPE HERE Covered by web application penetration testing. Click to open that service. PERIMETER: NOT IN SCOPE HERE Covered by external network penetration testing. Click to open that service. API: NOT IN SCOPE HERE Covered by API penetration testing. Click to open that service. EMAIL: CHECKS INCLUDE Mailbox rule and sign-in correlation Impossible-travel and legacy authentication alerts CLOUD TENANCY: CHECKS INCLUDE Cloud audit log collection Configuration and privilege changes OFFICE NETWORK: CHECKS INCLUDE Network event collection and correlation Lateral movement across hosts WORKSTATION: CHECKS INCLUDE Endpoint event collection Suspicious process and script activity WIRELESS: NOT IN SCOPE HERE Covered by wireless penetration testing. Click to open that service. IDENTITY: CHECKS INCLUDE Sign-in, privilege and account-change detection Multi-factor fatigue and account takeover CROWN JEWELS: NOT IN SCOPE HERE Covered by internal network penetration testing. Click to open that service. SERVERS: CHECKS INCLUDE Server and application log correlation Administrative activity outside normal patterns

We collect and correlate events across your environment, triage the alerts that matter, and continuously tune the rules that generate them.

  • Collection from network, endpoint, cloud and identity sources
  • Correlation across sources to surface activity a single log would miss
  • Alert triage by analysts, with context and a recommended action
  • Continuous rule tuning to cut false positives and close detection gaps
  • Detection mapped to the MITRE ATT&CK framework
  • Escalation paths agreed with you, including out of hours
  • Monthly reporting on activity, trends and tuning
  • A standing point of contact who knows your environment

How we test it

A SIEM that collects logs but has no one watching them is an expense pretending to be a control. The value lies in correlating events across sources and in an analyst deciding, quickly, which handful out of thousands matter. Aurian’s managed SIEM monitoring provides that: collection across network, endpoint, cloud and identity, correlation against detection rules mapped to the MITRE ATT&CK framework, and analysts who triage what fires and tune what does not.

Correlation is where scattered events become a picture. An overseas sign-in on its own might be a travelling executive; a new mail-forwarding rule on its own might be a user tidying their inbox. Seen together within minutes, they are an account takeover in progress, and the setup for invoice fraud. A single log source would escalate neither; correlation escalates both, and an analyst confirms it within the hour. That is the difference between blocking an account and explaining a fraudulent payment after the fact.

The service runs in the open. We agree the escalation paths with you, triage alerts with context and a recommended action rather than forwarding raw noise, and tune the rules continuously so false positives fall and detection gaps close. Each month you receive a report on the activity we saw, the trends behind it, and the tuning we did, and you have a standing contact who knows your environment. It pairs naturally with EDR monitoring, which feeds endpoint depth into the same picture.

Standards MITRE ATT&CK, NIST SP 800-61, ASD Essential Eight

  1. 01 Onboarding

    We connect your log sources, establish what normal looks like, and agree the escalation paths and priorities with you.

  2. 02 Correlation

    We correlate events across sources against detection rules mapped to MITRE ATT&CK, so related activity is seen as one story.

  3. 03 Triage

    Analysts review the alerts that fire, add context, discard the noise, and escalate what is real with a recommended action.

  4. 04 Tuning and reporting

    We tune the rules continuously to cut false positives and close gaps, and report monthly on activity and trends.

What you receive

Every finding in an Aurian report looks like this: what we found, the evidence, what it means for you, and what to change.

High AUR-2026-014 Sample finding, fictional environment

Correlated sign-in and mailbox rule changes reveal account takeover

Affected asset
Entra ID and Exchange Online, user j.smith
Rating
High Likely 4 × High 4 = 16

Description

Correlation across identity and mail sources surfaced an account takeover that no single log made obvious: an impossible-travel sign-in from overseas, followed minutes later by the creation of an inbox rule that forwards and deletes finance mail. Neither event alone would have escalated; together they are a clear compromise, and analysts raised it within the hour.

Evidence

[identity] 08:12 sign-in j.smith from 198.51.100.7 (overseas)
           prior sign-in 07:55 from Sydney (impossible travel)
[mail]     08:19 new inbox rule 'r' by j.smith:
           if from contains 'invoice' -> forward ext; delete
[correlation] identity+mail within 7 min -> escalated 08:26

An impossible-travel sign-in and a suspicious mail rule, correlated within minutes, revealed a takeover in progress.

Impact

Account takeover leading to a mail-forwarding rule is the classic setup for invoice fraud, quietly redirecting finance correspondence while the user notices nothing. Catching it through correlation, within the hour, is the difference between blocking the account and explaining a fraudulent payment to the board.

Remediation

Disable the account and revoke its sessions, remove the malicious inbox rule, and review what the attacker accessed. Enforce phishing-resistant multi-factor authentication, block legacy authentication, and add a standing detection for external-forwarding rules on finance mailboxes.

References

  • MITRE ATT&CK, T1114 email collection
  • NIST SP 800-61, computer security incident handling guide
  • Event collection and correlation across your in-scope sources
  • Analyst-triaged alerts with context and a recommended action
  • Detection mapped to the MITRE ATT&CK framework
  • Continuous rule tuning to cut false positives and close gaps
  • Monthly reporting on activity, trends and tuning

Common findings

What this kind of engagement typically surfaces, so you can recognise your own environment.

  • Account takeover

    Impossible-travel sign-ins, multi-factor fatigue and malicious inbox rules, seen by correlating identity and mail events.

  • Suspicious administrative activity

    Privilege changes, new accounts and configuration changes outside normal patterns, surfaced against a learned baseline.

  • Lateral movement

    Authentication and process activity across hosts that, correlated, reveals an intruder moving through the network.

  • Detection gaps

    Log sources not being collected, or activity no rule would catch, found and closed through tuning.

  • Noisy, untuned rules

    Alerts that fire constantly and mean nothing, drowning the real signal, cut down through continuous tuning.

  • Data exfiltration signals

    Unusual outbound volume or destinations that, joined to other events, indicate data leaving the environment.

Frequently asked questions

Do you provide the SIEM platform or use ours?

We work with your existing SIEM rather than supplying one. The service is the collection, correlation, triage and tuning we perform on top of it, and the analysts who do it.

Is monitoring 24/7?

Alerts are triaged during business hours, and a consultant is on call for critical alerts outside them. We agree the escalation path and response expectations with you at onboarding.

How is this different from EDR monitoring?

EDR watches endpoints in depth. SIEM correlates events across everything, network, cloud, identity and endpoints included, to see activity that no single source reveals. They complement each other, and many clients run both, with EDR feeding the SIEM.

Will you respond to incidents, or just alert us?

We triage, add context and recommend the action, and we escalate to you along the agreed path. Containment and incident response are a separate engagement, scoped when they are needed.

How long does onboarding take?

Onboarding is connecting to your SIEM, or standing one up in your tenant if you do not have one running (Microsoft Sentinel, for example), bringing the priority log sources in, tuning the rules to your environment and learning what normal looks like in it. How long that takes depends on what is already in place. We agree the plan and the priority sources with you at the start.

Related services

EDR monitoring

Managed EDR monitoring on your endpoint platform: alert triage, investigation, containment guidance, threat hunting and tuning by the consultants who test.

Vulnerability management

Managed vulnerability management: continuous scanning of external and internal assets, results validated and ranked by a consultant, reported monthly.

Internal network penetration testing

Internal penetration testing from a foothold on your network: Active Directory attack paths, credential hygiene and segmentation, tested to domain admin.

Managed security services

Scope a test with a senior consultant

Tell us what you need to know about your environment. We reply within one business day.

Scope a test Call 1300 AURIAN

Aurian Security is an Australian penetration testing and security assurance firm. Senior consultants perform every engagement, for clients across the country.

Penetration testing

  • External network penetration testing
  • Internal network penetration testing
  • Web application penetration testing
  • API penetration testing
  • Mobile application penetration testing
  • Wireless penetration testing
  • Cloud security assessment
  • Social engineering and phishing simulation

Assurance and managed

  • Security assurance
  • Essential Eight assessment
  • Configuration review and benchmarking
  • Remediation support and retesting
  • Managed security
  • Vulnerability management
  • Continuous application scanning
  • SIEM monitoring
  • EDR monitoring

Company

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