mirror of
https://github.com/elastic/protections-artifacts
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protectionsmachine
85 lines
2.7 KiB
TOML
85 lines
2.7 KiB
TOML
[rule]
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description = """
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Detects the creation of a reverse shell through a suspicious parent child relationship spawned via a shell with
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suspicious command line arguments. Attackers may spawn reverse shells to establish persistence onto a target system.
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"""
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id = "52206861-4570-4b8b-a73e-4ef0ea379a4c"
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license = "Elastic License v2"
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name = "Linux Reverse Shell"
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os_list = ["linux"]
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reference = ["https://www.elastic.co/security-labs/primer-on-persistence-mechanisms"]
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version = "1.0.8"
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query = '''
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sequence with maxspan=5s
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[network where event.type == "start" and event.action in ("connection_attempted", "connection_accepted") and
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process.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish", "socat") and
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not (destination.ip == null or destination.ip == "0.0.0.0" or cidrmatch(
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destination.ip, "10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12", "192.0.0.0/24", "192.0.0.0/29",
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"192.0.0.8/32", "192.0.0.9/32", "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24",
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"192.31.196.0/24", "192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24", "224.0.0.0/4", "100.64.0.0/10",
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"192.175.48.0/24","198.18.0.0/15", "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10",
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"FF00::/8"
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)
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)] by process.entity_id
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[process where event.type == "start" and event.action in ("exec", "fork") and
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process.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish") and (
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(process.args in ("-i", "-il", "-li")) or (process.parent.name == "socat" and process.parent.command_line like~ "*exec*")
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)] by process.parent.entity_id
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'''
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min_endpoint_version = "8.5.0"
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optional_actions = []
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[[actions]]
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action = "kill_process"
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field = "process.entity_id"
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state = 0
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[[actions]]
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action = "kill_process"
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field = "process.entity_id"
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state = 1
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[[actions]]
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action = "kill_process"
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field = "process.parent.entity_id"
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state = 0
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[[actions]]
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action = "kill_process"
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field = "process.parent.entity_id"
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state = 1
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[[threat]]
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framework = "MITRE ATT&CK"
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[[threat.technique]]
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id = "T1059"
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name = "Command and Scripting Interpreter"
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reference = "https://attack.mitre.org/techniques/T1059/"
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[[threat.technique.subtechnique]]
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id = "T1059.004"
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name = "Unix Shell"
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reference = "https://attack.mitre.org/techniques/T1059/004/"
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[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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[[threat]]
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framework = "MITRE ATT&CK"
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[[threat.technique]]
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id = "T1071"
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name = "Application Layer Protocol"
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reference = "https://attack.mitre.org/techniques/T1071/"
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[threat.tactic]
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id = "TA0011"
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name = "Command and Control"
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reference = "https://attack.mitre.org/tactics/TA0011/"
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[internal]
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min_endpoint_version = "8.5.0"
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