shashank-elastic
105 lines
3.0 KiB
TOML
105 lines
3.0 KiB
TOML
[metadata]
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creation_date = "2023/07/06"
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integration = ["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 = "2023/10/13"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies the use of Cmdlets and methods related to archive compression activities. Adversaries will often compress and
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encrypt data in preparation for exfiltration.
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"""
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from = "now-119m"
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interval = "60m"
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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 = "PowerShell Script with Archive Compression Capabilities"
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risk_score = 21
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rule_id = "27071ea3-e806-4697-8abc-e22c92aa4293"
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setup = """
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The 'PowerShell Script Block Logging' logging policy must be enabled.
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Steps to implement the logging policy with Advanced Audit Configuration:
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```
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Computer Configuration >
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Administrative Templates >
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Windows PowerShell >
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Turn on PowerShell Script Block Logging (Enable)
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```
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Steps to implement the logging policy via registry:
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```
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reg add "hklm\\SOFTWARE\\Policies\\Microsoft\\Windows\\PowerShell\\ScriptBlockLogging" /v EnableScriptBlockLogging /t REG_DWORD /d 1
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```
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"""
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severity = "low"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Collection", "Data Source: PowerShell Logs", "Rule Type: BBR"]
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timestamp_override = "event.ingested"
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type = "query"
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building_block_type = "default"
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query = '''
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event.category:process and host.os.type:windows and
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(
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powershell.file.script_block_text : (
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"IO.Compression.ZipFile" or
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"IO.Compression.ZipArchive" or
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"ZipFile.CreateFromDirectory" or
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"IO.Compression.BrotliStream" or
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"IO.Compression.DeflateStream" or
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"IO.Compression.GZipStream" or
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"IO.Compression.ZLibStream"
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) and
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powershell.file.script_block_text : (
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"CompressionLevel" or
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"CompressionMode" or
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"ZipArchiveMode"
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) or
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powershell.file.script_block_text : "Compress-Archive"
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) and
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not file.path : (
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?\:\\\\ProgramData\\\\Microsoft\\\\Windows?Defender?Advanced?Threat?Protection\\\\Downloads\\\\* or
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?\:\\\\ProgramData\\\\Microsoft\\\\Windows?Defender?Advanced?Threat?Protection\\\\DataCollection\\\\* or
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?\:\\\\Program?Files\\\\Microsoft?Dependency?Agent\\\\plugins\\\\* or
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?\:\\\\Program?Files\\\\Azure\\\\StorageSyncAgent\\\\AFSDiag.ps1
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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 = "T1560"
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name = "Archive Collected Data"
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reference = "https://attack.mitre.org/techniques/T1560/"
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[rule.threat.tactic]
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id = "TA0009"
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name = "Collection"
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reference = "https://attack.mitre.org/tactics/TA0009/"
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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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