JAMF MDM Execution

Status: test
Severity: low
Log source: category process_creation, product macos
Author: Jay Pandit
Source: github.com/SigmaHQ/sigma

Detects execution of the "jamf" binary to create user accounts and run commands. For example, the binary can be abused by attackers on the system in order to bypass security controls or remove application control polices.

Known false positives

Legitimate use of the JAMF CLI tool by IT support and administrators

MITRE ATT&CK coverage

Tactic	Techniques
Execution	No specific technique

Telemetry coverage

Platform	Record / event type
macOS	ESF event `exec` (NOTIFY): Fires after execve(2) or posix_spawn(2) succeeds, delivering a post-fact record of the new process.

Rule body

title: JAMF MDM Execution
id: be2e3a5c-9cc7-4d02-842a-68e9cb26ec49
status: test
description: |
    Detects execution of the "jamf" binary to create user accounts and run commands. For example, the binary can be abused by attackers on the system in order to bypass security controls or remove application control polices.
references:
    - https://github.com/MythicAgents/typhon/
    - https://www.zoocoup.org/casper/jamf_cheatsheet.pdf
    - https://docs.jamf.com/10.30.0/jamf-pro/administrator-guide/Components_Installed_on_Managed_Computers.html
author: Jay Pandit
date: 2023-08-22
tags:
    - attack.execution
logsource:
    category: process_creation
    product: macos
detection:
    selection:
        Image|endswith: '/jamf'
        CommandLine|contains:
            # Note: add or remove commands according to your policy
            - 'createAccount'
            - 'manage'
            - 'removeFramework'
            - 'removeMdmProfile'
            - 'resetPassword'
            - 'setComputerName'
    condition: selection
falsepositives:
    - Legitimate use of the JAMF CLI tool by IT support and administrators
level: low

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Image|endswith: '/jamf'
    CommandLine|contains:
        - 'createAccount'
        - 'manage'
        - 'removeFramework'
        - 'removeMdmProfile'
        - 'resetPassword'
        - 'setComputerName'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`createAccount` `manage` `removeFramework` `removeMdmProfile` `resetPassword` `setComputerName`	`field:"CommandLine" kind:match`
`Image`	ends_with	`/jamf`	`field:"Image" kind:ends_with value:"/jamf"`