1200kmSECURITY RESEARCH
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T1033 System Owner/User Discovery — Attack Simulation

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…

Technique description

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…

At least one platform-compatible Atomic procedure is documented. Individual review, lab prerequisites, and validation remain required.

Official ATT&CK definition · Detection rules and anomaly models

Documented simulation candidates

Connected ecosystem references

Linked tags

enterprisecloud-hosted-endpointnetwork-infrastructureonpremLinuxmacOSNetwork DevicesWindowsdiscoveryisolated_authorized_labprocedure_review_requiredtelemetry_configuration_required
can_simulatetechniquesource_mapped

Detection and collection

T1033 detection workspace

Attack tools

Threat actor context

These are explicit actor-to-technique associations in the existing Threat Matrix snapshot, not attribution of an event or proof that a detector identifies the actor. No tool-to-actor relationship is inferred.

Existing research

Threat Matrix: knowledge routes, evidence and actor context

Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.