[Rule Tuning] Potential LSASS Clone Creation via PssCaptureSnapShot (#2691)

(cherry picked from commit eafe54c)

Author: w0rk3r

rules/windows/credential_access_via_snapshot_lsass_clone_creation.toml

@@ -4,7 +4,7 @@ integration = ["windows"]
 maturity = "production"
 min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 min_stack_version = "8.3.0"
-updated_date = "2023/02/22"
+updated_date = "2023/04/05"
 
 [rule]
 author = ["Elastic"]
@@ -13,7 +13,7 @@ Identifies the creation of an LSASS process clone via PssCaptureSnapShot where t
 process instance. This may indicate an attempt to evade detection and dump LSASS memory for credential access.
 """
 from = "now-9m"
-index = ["winlogbeat-*", "logs-windows.*"]
+index = ["winlogbeat-*", "logs-system.*", "logs-windows.*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Potential LSASS Clone Creation via PssCaptureSnapShot"