Justin Ibarra
75 lines
2.4 KiB
TOML
75 lines
2.4 KiB
TOML
[metadata]
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creation_date = "2020/12/23"
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maturity = "production"
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updated_date = "2021/03/03"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies the execution of a suspicious browser child process. Adversaries may gain access to a system through a user
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visiting a website over the normal course of browsing. With this technique, the user's web browser is typically targeted
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for exploitation.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Suspicious Browser Child Process"
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references = [
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"https://objective-see.com/blog/blog_0x43.html",
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"https://fr.slideshare.net/codeblue_jp/cb19-recent-apt-attack-on-crypto-exchange-employees-by-heungsoo-kang",
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]
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risk_score = 73
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rule_id = "080bc66a-5d56-4d1f-8071-817671716db9"
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severity = "high"
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tags = ["Elastic", "Host", "macOS", "Threat Detection", "Initial Access", "Execution"]
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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 in ("start", "process_started") and
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process.parent.name : ("Google Chrome", "Google Chrome Helper*", "firefox", "Opera", "Safari", "com.apple.WebKit.WebContent", "Microsoft Edge") and
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process.name : ("sh", "bash", "dash", "ksh", "tcsh", "zsh", "curl", "wget", "python*", "perl*", "php*", "osascript", "pwsh") and
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process.command_line != null and
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not process.args :
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(
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"/Library/Application Support/Microsoft/MAU*/Microsoft AutoUpdate.app/Contents/MacOS/msupdate",
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"hw.model",
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"IOPlatformExpertDevice",
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"/Volumes/Google Chrome/Google Chrome.app/Contents/Frameworks/*/Resources/install.sh",
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"--defaults-torrc",
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"Chrome.app",
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"Framework.framework/Versions/*/Resources/keystone_promote_preflight.sh",
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"/Users/*/Library/Application Support/Google/Chrome/recovery/*/ChromeRecovery",
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"$DISPLAY",
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"GIO_LAUNCHED_DESKTOP_FILE_PID=$$"
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)
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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 = "T1203"
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name = "Exploitation for Client Execution"
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reference = "https://attack.mitre.org/techniques/T1203/"
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[rule.threat.tactic]
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id = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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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 = "T1189"
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name = "Drive-by Compromise"
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reference = "https://attack.mitre.org/techniques/T1189/"
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[rule.threat.tactic]
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id = "TA0001"
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name = "Initial Access"
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reference = "https://attack.mitre.org/tactics/TA0001/"
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