Sigma rule: Atomic MacOS Stealer - FileGrabber Infostealer Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-35458057f895, updated 2025-11-22T00:00:00.000Z.

SigmaHQ marks this rule as deprecated.

Rule

Title
Atomic MacOS Stealer - FileGrabber Infostealer Execution
Status
deprecated
Level
high
Author
Jason Phang Vern - Onn (Gen Digital)
Date
2025-09-12
Modified
2025-11-22
File
deprecated/macos/proc_creation_macos_malware_amos_filegrabber_exec.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the execution of FileGrabber on macOS, which is associated with Amos infostealer campaigns targeting sensitive user files.

Log source

product
macos
category
process_creation

Detection

selection:
    CommandLine|contains|all:
        - 'FileGrabber'
        - '/tmp'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.t1059.002
  • detection.emerging-threats

MITRE ATT&CK ids this rule names

References

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

Sources and licences

  • SigmaHQ

    "Atomic MacOS Stealer - FileGrabber Infostealer Execution" by Jason Phang Vern - Onn (Gen Digital) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/deprecated/macos/proc_creation_macos_malware_amos_filegrabber_exec.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: Atomic MacOS Stealer - FileGrabber Infostealer Execution",
entity page, dataset version ref-35458057f895, updated 2025-11-22T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/e710a880-1f18-4417-b6a0-b5afdf7e305a (accessed 2026-11-03).
Underlying source: SigmaHQ rule e710a880-1f18-4417-b6a0-b5afdf7e305a, 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.