Jonhnathan
fe36864c77
* PowerShell Suspicious Discovery Related Windows API Functions Initial Rule
* Update severity
* Lint
Co-authored-by: Justin Ibarra <brokensound77@users.noreply.github.com>
(cherry picked from commit b7dcbbae72)
94 lines
2.5 KiB
TOML
94 lines
2.5 KiB
TOML
[metadata]
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creation_date = "2021/10/13"
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maturity = "production"
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updated_date = "2021/10/14"
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[rule]
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author = ["Elastic"]
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description = """
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This rule detects the use of discovery-related Windows API Functions in Powershell Scripts. Attackers can use these
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functions to perform various situational awareness related activities, like enumerating users, shares, sessions, domain
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trusts, groups, etc.,
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"""
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false_positives = ["Legitimate Powershell Scripts that make use of these Functions"]
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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 = "PowerShell Suspicious Discovery Related Windows API Functions"
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references = [
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"https://github.com/BC-SECURITY/Empire/blob/9259e5106986847d2bb770c4289c0c0f1adf2344/data/module_source/situational_awareness/network/powerview.ps1#L21413",
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]
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risk_score = 47
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rule_id = "61ac3638-40a3-44b2-855a-985636ca985e"
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severity = "medium"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Discovery"]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.code:"4104" and
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powershell.file.script_block_text : (
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NetShareEnum or
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NetWkstaUserEnum or
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NetSessionEnum or
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NetLocalGroupEnum or
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NetLocalGroupGetMembers or
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DsGetSiteName or
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DsEnumerateDomainTrusts or
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WTSEnumerateSessionsEx or
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WTSQuerySessionInformation or
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LsaGetLogonSessionData or
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QueryServiceObjectSecurity
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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 = "T1135"
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name = "Network Share Discovery"
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reference = "https://attack.mitre.org/techniques/T1135/"
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[[rule.threat.technique]]
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id = "T1069"
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name = "Permission Groups Discovery"
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reference = "https://attack.mitre.org/techniques/T1069/"
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[[rule.threat.technique.subtechnique]]
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id = "T1069.001"
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name = "Local Groups"
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reference = "https://attack.mitre.org/techniques/T1069/001/"
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[rule.threat.tactic]
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id = "TA0007"
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name = "Discovery"
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reference = "https://attack.mitre.org/tactics/TA0007/"
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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.technique]]
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id = "T1106"
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name = "Native API"
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reference = "https://attack.mitre.org/techniques/T1106/"
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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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