[New Rule] Suspicious Microsoft Diagnostics Wizard Execution (#2005)

* [New Rule] Suspicious Microsoft Diagnostics Wizard Execution https://lolbas-project.github.io/lolbas/Binaries/Msdt/ https://twitter.com/nao_sec/status/1530196847679401984 * Update rules/windows/defense_evasion_proxy_execution_via_msdt.toml Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com> Co-authored-by: Jonhnathan <jonhnathancesar@gmail.com>
2022-06-01 17:02:47 +02:00
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+[metadata]
+creation_date = "2022/05/31"
+maturity = "production"
+updated_date = "2022/05/31"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies potential abuse of the Microsoft Diagnostics Troubleshooting Wizard (MSDT) to proxy malicious command or binary
+execution via malicious process arguments.
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
+language = "eql"
+license = "Elastic License v2"
+name = "Suspicious Microsoft Diagnostics Wizard Execution"
+note = """## Config
+
+If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
+"""
+references = [
+    "https://twitter.com/nao_sec/status/1530196847679401984",
+    "https://lolbas-project.github.io/lolbas/Binaries/Msdt/",
+]
+risk_score = 73
+rule_id = "2c3c29a4-f170-42f8-a3d8-2ceebc18eb6a"
+severity = "high"
+tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
+type = "eql"
+
+query = '''
+process where event.type in ("start", "process_started") and
+   (process.pe.original_file_name == "msdt.exe" or process.name : "msdt.exe") and
+   (
+    process.args : ("IT_RebrowseForFile=*", "ms-msdt:/id", "ms-msdt:-id", "*FromBase64*") or
+
+    (process.args : "-af" and process.args : "/skip" and 
+     process.parent.name : ("explorer.exe", "cmd.exe", "powershell.exe", "cscript.exe", "wscript.exe", "mshta.exe", "rundll32.exe", "regsvr32.exe") and
+     process.args : ("?:\\WINDOWS\\diagnostics\\index\\PCWDiagnostic.xml", "PCWDiagnostic.xml", "?:\\Users\\Public\\*", "?:\\Windows\\Temp\\*")) or
+
+    (process.pe.original_file_name == "msdt.exe" and not process.name : "msdt.exe" and process.name != null) or
+
+    (process.pe.original_file_name == "msdt.exe" and not process.executable : ("?:\\Windows\\system32\\msdt.exe", "?:\\Windows\\SysWOW64\\msdt.exe"))
+    )
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1218"
+name = "Signed Binary Proxy Execution"
+reference = "https://attack.mitre.org/techniques/T1218/"
+
+[rule.threat.tactic]
+id = "TA0005"
+name = "Defense Evasion"
+reference = "https://attack.mitre.org/tactics/TA0005/"