Split A File Into Pieces - Linux — Sigma Rule

Rule metadata and linked tags

Author: Igor Fits, oscd.community. Source status: test; severity: low. Source dates: 2020-10-15 / 2022-11-28.

{
  "product": "linux",
  "service": "auditd"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 34ee1fbfe80a1c3ceee767e58d404f75ad65347225a7eb3535dc73126b2743b0

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Split A File Into Pieces - Linux
id: 2dad0cba-c62a-4a4f-949f-5f6ecd619769
status: test
description: 'Detection use of the command "split" to split files into parts and possible transfer.'
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1030/T1030.md
author: 'Igor Fits, oscd.community'
date: 2020-10-15
modified: 2022-11-28
tags:
    - attack.exfiltration
    - attack.t1030
logsource:
    product: linux
    service: auditd
detection:
    selection:
        type: 'SYSCALL'
        comm: 'split'
    condition: selection
falsepositives:
    - Legitimate administrative activity
level: low

Original YAML and metadata in JSON

False positives

• Legitimate administrative activity

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1030/T1030.md