Ruben Groenewoud
38e2e4766f
* [Rule Tuning] Linux DR BBR Tuning * Update discovery_getconf_execution.toml * Fix typo in process.args for dscl command * Update persistence_web_server_sus_file_creation.toml --------- Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
73 lines
2.7 KiB
TOML
73 lines
2.7 KiB
TOML
[metadata]
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bypass_bbr_timing = true
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creation_date = "2024/02/01"
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integration = ["endpoint"]
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maturity = "production"
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updated_date = "2025/12/24"
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[rule]
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author = ["Elastic"]
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building_block_type = "default"
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description = """
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Monitors for the execution of Unix utilities that may be leveraged as memory address seekers. Attackers may leverage
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built-in utilities to seek specific memory addresses, allowing for potential future manipulation/exploitation.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*", "endgame-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Potential Memory Seeking Activity"
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references = ["https://github.com/arget13/DDexec"]
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risk_score = 21
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rule_id = "035a6f21-4092-471d-9cda-9e379f459b1e"
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severity = "low"
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tags = [
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"Domain: Endpoint",
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"OS: Linux",
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"Use Case: Threat Detection",
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"Tactic: Discovery",
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"Rule Type: BBR",
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"Data Source: Elastic Defend",
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"Data Source: Elastic Endgame",
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]
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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 host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event") and (
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(process.name == "tail" and process.args in ("-c", "--bytes")) or
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(process.name == "cmp" and process.args == "-i") or
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(process.name in ("hexdump", "xxd") and process.args == "-s") or
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(process.name == "dd" and process.args : ("skip*", "seek*"))
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) and not (
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process.parent.args like ("/opt/error_monitor/error_monitor.sh", "printf*", "/sbin/dracut") or
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process.parent.name in ("acme.sh", "dracut", "leapp") or
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process.parent.executable like (
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"/bin/cagefs_enter", "/opt/nessus_agent/sbin/nessus-service", "/usr/libexec/platform-python*",
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"/usr/libexec/vdsm/vdsmd", "/usr/local/bin/docker-entrypoint.sh", "/usr/lib/module-init-tools/lsinitrd-quick",
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"/usr/bin/unmkinitramfs", "/usr/bin/lsinitramfs", "/opt/msp-agent/msp-agent-core.run",
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"/usr/local/cloudamize/bin/register.sh", "/usr/local/hestia/bin/v-log-action", "/usr/local/emps/bin/php"
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) or
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process.parent.command_line like "sh*acme.sh*" or
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process.args like ("/var/tmp/dracut*", "/opt/bitdefender-security-tools/var/log/script_update.log") or
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?process.working_directory like (
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"/usr/local/nutanix/ngt/python/bin", "/var/lib/waagent/*", "/opt/Tychon/Endpoint/bin",
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"/usr/local/cloudamize/bin", "/opt/sentinelone/bin"
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) or
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process.command_line in ("tail -c 1", "tail -c 2") or
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(process.command_line == "dd ibs=18850 skip=1 count=1" and process.parent.args == "/opt/msp-agent/msp-agent-core.run")
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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 = "T1057"
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name = "Process Discovery"
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reference = "https://attack.mitre.org/techniques/T1057/"
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[rule.threat.tactic]
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id = "TA0007"
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name = "Discovery"
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reference = "https://attack.mitre.org/tactics/TA0007/"
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