Jonhnathan
851c566730
* Replaces event.code with event.category * bump updated_date Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
51 lines
1.3 KiB
TOML
51 lines
1.3 KiB
TOML
[metadata]
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creation_date = "2021/10/15"
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maturity = "production"
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updated_date = "2021/11/17"
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[rule]
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author = ["Elastic"]
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description = """
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Detects the presence of portable executables (PE) in a PowerShell script by looking for its encoded header.
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Attackers embed PEs into PowerShell scripts for injecting them into the memory, avoiding defenses by not writing to
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disk.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-windows.*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "Suspicious Portable Executable Encoded in Powershell Script"
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risk_score = 47
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rule_id = "ad84d445-b1ce-4377-82d9-7c633f28bf9a"
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severity = "medium"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.category:process and
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powershell.file.script_block_text : (
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TVqQAAMAAAAEAAAA
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)
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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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