Sigma rule: GUI Input Capture - macOS

Rule

Title

GUI Input Capture - macOS

Status

test

Level

low

Author

remotephone, oscd.community

Date

2020-10-13

Modified

2025-12-05

File

rules/macos/process_creation/proc_creation_macos_gui_input_capture.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects attempts to use system dialog prompts to capture user credentials

Log source

product

macos

category

process_creation

Detection

selection_img:
    Image|endswith: '/osascript'
selection_cli_1:
    CommandLine|contains|all:
        - '-e'
        - 'display'
        - 'dialog'
        - 'answer'
selection_cli_2:
    CommandLine|contains:
        - 'admin'
        - 'administrator'
        - 'authenticate'
        - 'authentication'
        - 'credentials'
        - 'pass'
        - 'password'
        - 'unlock'
condition: all of selection_*

False positives (as the rule lists them)

• Legitimate administration tools and activities

Tags

• attack.collection
• attack.credential-access
• attack.t1056.002

MITRE ATT&CK ids this rule names

• T1056.002

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1056.002/T1056.002.md
• https://scriptingosx.com/2018/08/user-interaction-from-bash-scripts/

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_gui_input_capture.yml