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Detection rules › Sigma

System Integrity Protection (SIP) Disabled

Status
test
Severity
medium
Log source
category process_creation, product macos
Author
Joseliyo Sanchez, @Joseliyo_Jstnk
Source
github.com/SigmaHQ/sigma

Detects the use of csrutil to disable the Configure System Integrity Protection (SIP). This technique is used in post-exploit scenarios.

MITRE ATT&CK coverage

TacticTechniques
Discovery

Telemetry coverage

PlatformRecord / event type
macOSESF event exec (NOTIFY): Fires after execve(2) or posix_spawn(2) succeeds, delivering a post-fact record of the new process.

Rule body

title: System Integrity Protection (SIP) Disabled
id: 3603f18a-ec15-43a1-9af2-d196c8a7fec6
status: test
description: |
    Detects the use of csrutil to disable the Configure System Integrity Protection (SIP). This technique is used in post-exploit scenarios.
references:
    - https://ss64.com/osx/csrutil.html
    - https://objective-see.org/blog/blog_0x6D.html
    - https://www.welivesecurity.com/2017/10/20/osx-proton-supply-chain-attack-elmedia/
    - https://www.virustotal.com/gui/file/05a2adb266ec6c0ba9ed176d87d8530e71e845348c13caf9f60049760c312cd3/behavior
author: Joseliyo Sanchez, @Joseliyo_Jstnk
date: 2024-01-02
tags:
    - attack.discovery
    - attack.t1518.001
logsource:
    product: macos
    category: process_creation
detection:
    # VT Query: behavior_processes:"csrutil status" p:5+ type:mac
    selection:
        Image|endswith: '/csrutil'
        CommandLine|contains: 'disable'
    condition: selection
falsepositives:
    - Unknown
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|endswith: '/csrutil'
    CommandLine|contains: 'disable'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • disable
field:"CommandLine" kind:match value:"disable"
Imageends_with
  • /csrutil
field:"Image" kind:ends_with value:"/csrutil"