Samirbous
21290cc055
* [Rule Tuning] Command Shell Activity Started via RunDLL32 * relinted and added FP note * update_date * Update rules/windows/execution_command_shell_via_rundll32.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> * Update rules/windows/execution_command_shell_via_rundll32.toml Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com> Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
49 lines
1.5 KiB
TOML
49 lines
1.5 KiB
TOML
[metadata]
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creation_date = "2020/10/19"
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maturity = "production"
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updated_date = "2021/03/08"
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[rule]
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author = ["Elastic"]
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description = "Identifies command shell activity started via RunDLL32, which is commonly abused by attackers to host malicious code."
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false_positives = ["Microsoft Windows installers leveraging RunDLL32 for installation."]
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Command Shell Activity Started via RunDLL32"
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risk_score = 21
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rule_id = "9ccf3ce0-0057-440a-91f5-870c6ad39093"
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severity = "low"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
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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 event.type == "start" and
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process.name : ("cmd.exe", "powershell.exe") and
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process.parent.name : "rundll32.exe" and process.parent.command_line != null and
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/* common FPs can be added here */
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not process.parent.args : ("C:\\Windows\\System32\\SHELL32.dll,RunAsNewUser_RunDLL",
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"C:\\WINDOWS\\*.tmp,zzzzInvokeManagedCustomActionOutOfProc")
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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 = "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.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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