Jonhnathan
b4c84e8a40
* Update Tags * Bump updated date separately to be easy to revert if needed * Update resource_development_ml_linux_anomalous_compiler_activity.toml * Apply changes from the discussion * Update persistence_init_d_file_creation.toml * Update defense_evasion_timestomp_sysmon.toml * Update defense_evasion_application_removed_from_blocklist_in_google_workspace.toml * Update missing Tactic tags * Update unit tests to match new tags * Add missing IG tags * Delete okta_threat_detected_by_okta_threatinsight.toml * Update command_and_control_google_drive_malicious_file_download.toml * Update persistence_rc_script_creation.toml * Mass bump * Update persistence_shell_activity_by_web_server.toml * . --------- Co-authored-by: Mika Ayenson <Mika.ayenson@elastic.co> Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
81 lines
2.6 KiB
TOML
81 lines
2.6 KiB
TOML
[metadata]
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creation_date = "2023/03/04"
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integration = ["endpoint"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2023/04/03"
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[rule]
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author = ["Elastic"]
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description = "Identifies suspicious commands executed via a web server, which may suggest a vulnerability and remote shell access."
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false_positives = [
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"""
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Network monitoring or management products may have a web server component that runs shell commands as part of normal
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behavior.
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""",
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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 Remote Code Execution via Web Server"
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references = [
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"https://pentestlab.blog/tag/web-shell/",
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"https://www.elastic.co/security-labs/elastic-response-to-the-the-spring4shell-vulnerability-cve-2022-22965",
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]
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risk_score = 73
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rule_id = "f16fca20-4d6c-43f9-aec1-20b6de3b0aeb"
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severity = "high"
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tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Persistence", "Tactic: Initial Access", "Data Source: Elastic Endgame", "Use Case: Vulnerability"]
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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
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event.action in ("exec", "exec_event") and process.parent.executable : (
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"/usr/sbin/nginx", "/usr/local/sbin/nginx",
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"/usr/sbin/apache", "/usr/local/sbin/apache",
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"/usr/sbin/apache2", "/usr/local/sbin/apache2",
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"/usr/sbin/php*", "/usr/local/sbin/php*",
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"/usr/sbin/lighttpd", "/usr/local/sbin/lighttpd",
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"/usr/sbin/hiawatha", "/usr/local/sbin/hiawatha",
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"/usr/local/bin/caddy",
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"/usr/local/lsws/bin/lswsctrl",
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"*/bin/catalina.sh"
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) and
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process.name : ("*sh", "python*", "perl", "php*", "tmux") and
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process.args : ("whoami", "id", "uname", "cat", "hostname", "ip", "curl", "wget", "pwd")
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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 = "T1505"
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name = "Server Software Component"
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reference = "https://attack.mitre.org/techniques/T1505/"
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[[rule.threat.technique.subtechnique]]
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id = "T1505.003"
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name = "Web Shell"
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reference = "https://attack.mitre.org/techniques/T1505/003/"
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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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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1190"
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name = "Exploit Public-Facing Application"
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reference = "https://attack.mitre.org/techniques/T1190/"
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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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