Ross Wolf
5fcece8416
Co-Authored-By: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-Authored-By: Craig Chamberlain <randomuserid@users.noreply.github.com> Co-Authored-By: David French <56409778+threat-punter@users.noreply.github.com> Co-Authored-By: Derek Ditch <dcode@users.noreply.github.com> Co-Authored-By: Justin Ibarra <brokensound77@users.noreply.github.com>
48 lines
1.3 KiB
TOML
Executable File
48 lines
1.3 KiB
TOML
Executable File
[metadata]
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creation_date = "2020/03/25"
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ecs_version = ["1.5.0"]
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maturity = "production"
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updated_date = "2020/03/25"
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[rule]
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author = ["Elastic"]
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description = """
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An instance of MSBuild, the Microsoft Build Engine, started a PowerShell script or the Visual C# Command Line Compiler.
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This technique is sometimes used to deploy a malicious payload using the Build Engine.
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"""
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false_positives = [
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"""
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The Build Engine is commonly used by Windows developers but use by non-engineers is unusual. If a build system
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triggers this rule it can be exempted by process, user or host name.
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""",
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]
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index = ["winlogbeat-*"]
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language = "kuery"
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license = "Elastic License"
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name = "Microsoft Build Engine Started an Unusual Process"
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references = ["https://blog.talosintelligence.com/2020/02/building-bypass-with-msbuild.html"]
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risk_score = 21
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rule_id = "9d110cb3-5f4b-4c9a-b9f5-53f0a1707ae6"
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severity = "low"
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tags = ["Elastic", "Windows"]
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type = "query"
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query = '''
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process.parent.name:MSBuild.exe and process.name:(csc.exe or iexplore.exe or powershell.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 = "T1500"
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name = "Compile After Delivery"
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reference = "https://attack.mitre.org/techniques/T1500/"
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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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