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MediumElastic detection rulesElastic

AzCopy or Azure Storage Explorer Usage on Unusual Host

Identifies the first time, in a historical window, a host runs AzCopy copy or sync to Azure Blob, Data Lake, or File storage, or starts Azure Storage Explorer. These Microsoft utilities are legitimate data-transfer…

Description

Identifies the first time, in a historical window, a host runs AzCopy copy or sync to Azure Blob, Data Lake, or File storage, or starts Azure Storage Explorer. These Microsoft utilities are legitimate data-transfer tools; ransomware and cloud-ransomware operators drop portable copies and use SAS-authenticated jobs to pull data from victim storage and push it to attacker-controlled accounts.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

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Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows

The rule states no platform. This is derived from the 3 ATT&CK techniques it maps to.

Log source category
event_index

Known benign triggers

  • IT or DevOps using AzCopy for authorized migrations on a host that has not used it in the history window.
  • Users launching Azure Storage Explorer (including the installer) for the first time on a host.

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