Mika Ayenson, PhD
8993d1450b
--------- Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> Co-authored-by: terrancedejesus <terrance.dejesus@elastic.co> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> Co-authored-by: eric-forte-elastic <eric.forte@elastic.co>
87 lines
2.6 KiB
TOML
87 lines
2.6 KiB
TOML
[metadata]
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creation_date = "2023/07/13"
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integration = ["endpoint"]
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maturity = "production"
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updated_date = "2026/03/24"
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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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This rule identifies the execution of commands that can be used to delete files and directories. Adversaries may delete
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files and directories on a host system, such as logs, browser history, or malware.
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"""
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from = "now-119m"
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index = ["logs-endpoint.events.process-*"]
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interval = "60m"
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language = "eql"
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license = "Elastic License v2"
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name = "File or Directory Deletion Command"
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risk_score = 21
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rule_id = "5919988c-29e1-4908-83aa-1f087a838f63"
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severity = "low"
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tags = [
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"Domain: Endpoint",
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"OS: Windows",
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"Use Case: Threat Detection",
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"Tactic: Defense Evasion",
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"Rule Type: BBR",
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"Data Source: Elastic Defend",
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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 == "windows" and event.type == "start" and
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(
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((process.name : "rundll32.exe" or ?process.pe.original_file_name : "RUNDLL32.EXE") and process.args : "*InetCpl.cpl,Clear*") or
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((process.name : "reg.exe" or ?process.pe.original_file_name : "reg.exe") and process.args : "delete") or
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(
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(process.name : "cmd.exe" or ?process.pe.original_file_name : "Cmd.Exe") and
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process.args : ("*rmdir*", "*rm *", "rm", "*del *", "del", "*erase *", "erase") and
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not process.args : (
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"*\\AppData\\Local\\Microsoft\\OneDrive\\*",
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"*\\AppData\\Local\\Temp\\DockerDesktop\\*",
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"*\\AppData\\Local\\Temp\\Report.*",
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"*\\AppData\\Local\\Temp\\*.PackageExtraction"
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)
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) or
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((process.name : "powershell.exe" or ?process.pe.original_file_name : "PowerShell.EXE") and
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process.args : ("*rmdir", "rm", "rd", "*Remove-Item*", "del", "*]::Delete(*"))
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) and not user.id : "S-1-5-18"
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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 = "T1070"
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name = "Indicator Removal"
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reference = "https://attack.mitre.org/techniques/T1070/"
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[[rule.threat.technique.subtechnique]]
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id = "T1070.004"
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name = "File Deletion"
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reference = "https://attack.mitre.org/techniques/T1070/004/"
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[[rule.threat.technique]]
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id = "T1112"
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name = "Modify Registry"
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reference = "https://attack.mitre.org/techniques/T1112/"
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[[rule.threat.technique]]
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id = "T1218"
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name = "System Binary Proxy Execution"
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reference = "https://attack.mitre.org/techniques/T1218/"
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[[rule.threat.technique.subtechnique]]
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id = "T1218.011"
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name = "Rundll32"
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reference = "https://attack.mitre.org/techniques/T1218/011/"
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[rule.threat.tactic]
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id = "TA0005"
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name = "Defense Evasion"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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