Mika Ayenson
65 lines
2.2 KiB
TOML
65 lines
2.2 KiB
TOML
[metadata]
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creation_date = "2021/10/05"
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maturity = "production"
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updated_date = "2022/07/27"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies when a child process is spawned by the screensaver engine process, which is consistent with an attacker's
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malicious payload being executed after the screensaver activated on the endpoint. An adversary can maintain persistence
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on a macOS endpoint by creating a malicious screensaver (.saver) file and configuring the screensaver plist file to
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execute code each time the screensaver is activated.
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"""
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from = "now-9m"
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index = ["auditbeat-*", "logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Unexpected Child Process of macOS Screensaver Engine"
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note = """## Triage and analysis
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- Analyze the descendant processes of the ScreenSaverEngine process for malicious code and suspicious behavior such
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as a download of a payload from a server.
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- Review the installed and activated screensaver on the host. Triage the screensaver (.saver) file that was triggered to
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identify whether the file is malicious or not.
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## Setup
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If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
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"""
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references = [
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"https://posts.specterops.io/saving-your-access-d562bf5bf90b",
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"https://github.com/D00MFist/PersistentJXA",
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]
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risk_score = 47
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rule_id = "48d7f54d-c29e-4430-93a9-9db6b5892270"
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severity = "medium"
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tags = ["Elastic", "Host", "macOS", "Threat Detection", "Persistence"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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process where event.type == "start" and process.parent.name == "ScreenSaverEngine"
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1546"
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name = "Event Triggered Execution"
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reference = "https://attack.mitre.org/techniques/T1546/"
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[[rule.threat.technique.subtechnique]]
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id = "T1546.002"
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name = "Screensaver"
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reference = "https://attack.mitre.org/techniques/T1546/002/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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