Samirbous
d7aff43621
* [New] Suspicious Execution via ScreenConnect - Suspicious ScreenConnect Client Child Process (limited to known suspicious patterns) - ScreenConnect Server Spawning Suspicious Processes (webshell access via ScreenConnect server) * Update command_and_control_screenconnect_childproc.toml * Update rules/windows/initial_access_webshell_screenconnect_server.toml * Update rules/windows/command_and_control_screenconnect_childproc.toml * Update rules/windows/command_and_control_screenconnect_childproc.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update command_and_control_screenconnect_childproc.toml * Update command_and_control_screenconnect_childproc.toml --------- Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
70 lines
2.3 KiB
TOML
70 lines
2.3 KiB
TOML
[metadata]
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creation_date = "2024/03/26"
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integration = ["endpoint", "windows"]
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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 = "2024/03/26"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies suspicious processes being spawned by the ScreenConnect server process (ScreenConnect.Service.exe). This activity may
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indicate exploitation activity or access to an existing web shell backdoor.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.sysmon_operational-*", "logs-system.security*", "endgame-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "ScreenConnect Server Spawning Suspicious Processes"
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references = ["https://blackpointcyber.com/resources/blog/breaking-through-the-screen/"]
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risk_score = 73
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rule_id = "3d00feab-e203-4acc-a463-c3e15b7e9a73"
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severity = "high"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Initial Access", "Tactic: Execution", "Data Source: Elastic Endgame", "Data Source: Elastic Defend", "Data Source: Sysmon"]
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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 == "windows" and event.type == "start" and
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process.parent.name : "ScreenConnect.Service.exe" and
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(process.name : ("cmd.exe", "powershell.exe", "pwsh.exe", "powershell_ise.exe", "csc.exe") or
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?process.pe.original_file_name in ("cmd.exe", "powershell.exe", "pwsh.dll", "powershell_ise.exe"))
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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 = "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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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.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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[[rule.threat.technique.subtechnique]]
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id = "T1059.001"
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name = "PowerShell"
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reference = "https://attack.mitre.org/techniques/T1059/001/"
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[[rule.threat.technique.subtechnique]]
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id = "T1059.003"
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name = "Windows Command Shell"
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reference = "https://attack.mitre.org/techniques/T1059/003/"
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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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