Sigma rule: JXA In-memory Execution Via OSAScript

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-695d2e211f06, updated 2023-01-31T00:00:00.000Z.

Rule

Title
JXA In-memory Execution Via OSAScript
Status
test
Level
high
Author
Sohan G (D4rkCiph3r)
Date
2023-01-31
File
rules/macos/process_creation/proc_creation_macos_jxa_in_memory_execution.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects possible malicious execution of JXA in-memory via OSAScript

Log source

product
macos
category
process_creation

Detection

selection_main:
    CommandLine|contains|all:
        - 'osascript'
        - ' -e '
        - 'eval'
        - 'NSData.dataWithContentsOfURL'
selection_js:
    - CommandLine|contains|all:
          - ' -l '
          - 'JavaScript'
    - CommandLine|contains: '.js'
condition: all of selection_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.t1059.002
  • attack.t1059.007
  • attack.execution

MITRE ATT&CK ids this rule names

Related rules

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/macos/process_creation/proc_creation_macos_jxa_in_memory_execution.yml

Sources and licences

  • SigmaHQ

    "JXA In-memory Execution Via OSAScript" by Sohan G (D4rkCiph3r) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/macos/process_creation/proc_creation_macos_jxa_in_memory_execution.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: JXA In-memory Execution Via OSAScript",
entity page, dataset version ref-695d2e211f06, updated 2023-01-31T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/f1408a58-0e94-4165-b80a-da9f96cf6fc3 (accessed 2026-11-03).
Underlying source: SigmaHQ rule f1408a58-0e94-4165-b80a-da9f96cf6fc3, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.