Library · ATT&CK · T1033

Detecting System Owner/User Discovery in AWS, Azure, and GCP

01 What is T1033?

Adversaries may attempt to identify the primary user, currently logged in user, set of users that commonly uses a system, or whether a user is actively using the system.

a13e DCV does not yet ship a13e-curated detection rules for T1033. The page is descriptive: it covers what the technique is, which platforms attackers exercise it on, and where the upstream Sigma community has rules you can translate via CloudSigma. As CloudSigma's corpus extends to this technique, the page lights up with embedded rules automatically — no manual update required.

T1033 sits inside MITRE ATT&CK's enterprise matrix; adversaries reach it via initial access or credential-access steps and pivot from it into impact, lateral movement, or persistence. Cloud blueprints — AWS CloudTrail, Azure Sign-in, GCP Audit Logs — are the high-fidelity observation surfaces where T1033 most reliably surfaces in production. DCV maps each cloud-native finding type to the technique so an a13e coverage scan tells you whether your existing detection controls cover T1033 before an adversary exercises it.

02 Coverage in DCV

DCV does not currently ship a cloud-audit-log finding mapped directly to T1033. The technique earns a library page because a13e research cites it. Detection sits downstream, on the exploitation step the technique enables.

03 Detect with CloudSigma

CloudSigma does not currently ship a stand-alone rule that fires on T1033 in isolation. Generate a starting-point rule from the CVE, vulnerability disclosure, or threat-research blog post that exercises this technique, then pair it with SIEM-side correlation before enabling in production.

High-fidelity detection of T1033 requires correlation across multiple events. For example, a credential-validation call followed by a reconnaissance chain (List* / Describe*) within a short window from an unfamiliar source. A single-event Sigma rule on GetCallerIdentity alone fires constantly on legitimate CLI, SDK and CI/CD activity.

Where you have a specific advisory, vulnerability disclosure or blog post that exercises T1033-style abuse, CloudSigma can generate a starting-point rule from that input. You then deploy it in your SIEM and combine it with the SIEM's native correlation features (timeframe joins across users, source-IP anomalies, impossible-travel checks). For T1033 specifically the generated rule is rarely sufficient on its own; pair it with the SIEM-side correlation logic before enabling in production.

04 Related techniques

05 FAQ

What is T1033?

Adversaries may attempt to identify the primary user, currently logged in user, set of users that commonly uses a system, or whether a user is actively using the system. They may do this, for example, by retrieving account usernames or by using OS Credential Dumping. The information may be collected in a number of different ways using other Discovery techniques, because user and username details are prevalent throughout a system and include running process ownership, file/directory ownership, session information, and system logs. Adversaries may use the information from System Owner/User...

Which cloud platforms does a13e DCV cover for T1033?

a13e DCV does not currently map a cloud-native finding directly to T1033. This page is included for research and coverage-planning context; when platform mappings are added, this answer will list them.

Which SIEMs support T1033 detection via a13e CloudSigma?

a13e CloudSigma does not currently publish a production Sigma rule for T1033. When rules are added, supported SIEM dialects will appear here after SigmaHQ validation and target-SIEM conversion pass.

How many rules does a13e ship for T1033?

No production rules are published for T1033 yet. The count grows when CloudSigma ships new rules tagged to T1033 or when DCV adds a cloud-native finding type that maps to the technique.

How do I instrument T1033 detection in my own environment?

Run a free coverage scan in a13e DCV: it inspects your AWS, Azure, and GCP detection content + maps each existing detection to MITRE ATT&CK. Where T1033 is uncovered, DCV surfaces the gap with an actionable Sigma rule template you can copy into your SIEM. CloudSigma generates a fresh translation per SIEM dialect on demand.

Where can I see live coverage for my environment?

Run a free coverage scan in a13e DCV at https://app.a13e.com. The scan reads your existing detection content (Splunk, Sentinel, Chronicle, Elastic) and reports a per-technique coverage map against MITRE ATT&CK. The output highlights which techniques your DCV instance currently catches and which ones need new rules from CloudSigma.