[Rule Tuning] Linux 3rd Party EDR Support - Crowdstrike and S1 - 8 (#4355)

rules/linux/execution_shell_via_background_process.toml

@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2023/09/20"
-integration = ["endpoint"]
+integration = ["endpoint", "crowdstrike", "sentinel_one_cloud_funnel"]
 maturity = "production"
-updated_date = "2024/05/21"
+min_stack_version = "8.13.0"
+min_stack_comments = "Breaking change at 8.13.0 for SentinelOne Integration."
+updated_date = "2025/01/08"
 
 [rule]
 author = ["Elastic"]
@@ -11,7 +13,7 @@ Monitors for the execution of background processes with process arguments capabl
 channel. This may indicate the creation of a backdoor reverse connection, and should be investigated further.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.*", "endgame-*"]
+index = ["logs-endpoint.events.*", "endgame-*", "logs-crowdstrike.fdr*", "logs-sentinel_one_cloud_funnel.*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Potential Reverse Shell via Background Process"
@@ -50,14 +52,17 @@ tags = [
     "Tactic: Execution",
     "Data Source: Elastic Defend",
     "Data Source: Elastic Endgame",
+    "Data Source: Crowdstrike",
+    "Data Source: SentinelOne",
 ]
 timestamp_override = "event.ingested"
 type = "eql"
 
 query = '''
-process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event") and 
-process.name in ("setsid", "nohup") and process.args : "*/dev/tcp/*0>&1*" and 
-process.parent.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")
+process where host.os.type == "linux" and event.type == "start" and
+  event.action in ("exec", "exec_event", "start", "ProcessRollup2") and 
+  process.name in ("setsid", "nohup") and process.args : "*/dev/tcp/*0>&1*" and 
+  process.parent.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")
 '''