Detectionmediumtest

File Download Via Nscurl - MacOS

Detects the execution of the nscurl utility in order to download files.

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

Daniel CortezCreated Tue Jun 046d8a7cf1-8085-423b-b87d-7e880faabbdfmacos

Log Source

macOSProcess Creation

ProductmacOS← raw: macos

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection:
        Image|endswith: '/nscurl'
        CommandLine|contains:
            - '--download '
            - '--download-directory '
            - '--output '
            - '-dir '
            - '-dl '
            - '-ld'
            - '-o '
    condition: selection