Dev-0530 File Extension Rename

Dev-0530 actors are known to encrypt the contents of the victims device as well as renaming the file extensions. This query looks for the creation of files with .h0lyenc extension or presence of ransom note.

Detection logic

Detection requirements

Platform: ESXi IaaS Linux macOS Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: microsoftthreatprotection
Log source service: devicefileevents

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Detection rules

Dev-0530 File Extension Rename

Detection logic

Detection requirements

MITRE ATT&CK mappings

From the source

Licence

Authorship

Detection rules