[Rule Tuning] 3rd Party EDR - Add Crowdstrike FDR support - 1

detection_rules/schemas/definitions.py

@@ -79,7 +79,8 @@ def validator(value):
                         'sentinel_one_cloud_funnel',
                         'ti_rapid7_threat_command',
                         'm365_defender',
-                        'panw']
+                        'panw',
+                        'crowdstrike']
 NON_PUBLIC_FIELDS = {
     "related_integrations": (Version.parse('8.3.0'), None),
     "required_fields": (Version.parse('8.3.0'), None),

rules/windows/collection_email_powershell_exchange_mailbox.toml

@@ -1,10 +1,10 @@
 [metadata]
 creation_date = "2020/12/15"
-integration = ["endpoint", "windows", "system", "sentinel_one_cloud_funnel", "m365_defender"]
+integration = ["endpoint", "windows", "system", "sentinel_one_cloud_funnel", "m365_defender", "crowdstrike"]
 maturity = "production"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 min_stack_version = "8.14.0"
-updated_date = "2024/10/15"
+updated_date = "2024/10/31"
 
 [rule]
 author = ["Elastic"]
@@ -22,6 +22,7 @@ index = [
     "logs-system.security*",
     "logs-sentinel_one_cloud_funnel.*",
     "logs-m365_defender.event-*",
+    "logs-crowdstrike.fdr*",
 ]
 language = "eql"
 license = "Elastic License v2"
@@ -74,14 +75,6 @@ references = [
 ]
 risk_score = 47
 rule_id = "6aace640-e631-4870-ba8e-5fdda09325db"
-setup = """## Setup
-
-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 version 8.2.
-Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
-`event.ingested` to @timestamp.
-For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
-"""
 severity = "medium"
 tags = [
     "Domain: Endpoint",
@@ -95,6 +88,7 @@ tags = [
     "Data Source: SentinelOne",
     "Data Source: Microsoft Defender for Endpoint",
     "Data Source: System",
+    "Data Source: Crowdstrike",
 ]
 timestamp_override = "event.ingested"
 type = "eql"

rules/windows/command_and_control_headless_browser.toml

@@ -1,8 +1,8 @@
 [metadata]
 creation_date = "2024/05/10"
-integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel"]
+integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel", "crowdstrike"]
 maturity = "production"
-updated_date = "2024/10/15"
+updated_date = "2024/10/31"
 min_stack_version = "8.14.0"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 
@@ -22,6 +22,7 @@ index = [
     "logs-system.security*",
     "logs-m365_defender.event-*",
     "logs-sentinel_one_cloud_funnel.*",
+    "logs-crowdstrike.fdr*",
 ]
 language = "eql"
 license = "Elastic License v2"
@@ -67,6 +68,7 @@ tags = [
     "Data Source: Microsoft Defender for Endpoint",
     "Data Source: SentinelOne",
     "Data Source: Sysmon",
+    "Data Source: Crowdstrike",
 ]
 timestamp_override = "event.ingested"
 type = "eql"

rules/windows/command_and_control_rdp_tunnel_plink.toml

@@ -1,10 +1,10 @@
 [metadata]
 creation_date = "2020/10/14"
-integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "system"]
+integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "system", "crowdstrike"]
 maturity = "production"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 min_stack_version = "8.14.0"
-updated_date = "2024/10/17"
+updated_date = "2024/10/31"
 
 [rule]
 author = ["Elastic"]
@@ -13,7 +13,7 @@ Identifies potential use of an SSH utility to establish RDP over a reverse SSH T
 enable routing of network packets that would otherwise not reach their intended destination.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.process-*", "winlogbeat-*", "logs-windows.*", "endgame-*", "logs-system.security*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*"]
+index = ["logs-endpoint.events.process-*", "winlogbeat-*", "logs-windows.*", "endgame-*", "logs-system.security*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*", "logs-crowdstrike.fdr*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Potential Remote Desktop Tunneling Detected"
@@ -54,14 +54,6 @@ This rule looks for command lines involving the `3389` port, which RDP uses by d
 references = ["https://blog.netspi.com/how-to-access-rdp-over-a-reverse-ssh-tunnel/"]
 risk_score = 73
 rule_id = "76fd43b7-3480-4dd9-8ad7-8bd36bfad92f"
-setup = """## Setup
-
-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 version 8.2.
-Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
-`event.ingested` to @timestamp.
-For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
-"""
 severity = "high"
 tags = [
     "Domain: Endpoint",
@@ -75,6 +67,7 @@ tags = [
     "Data Source: SentinelOne",
     "Data Source: Microsoft Defender for Endpoint",
     "Data Source: System",
+    "Data Source: Crowdstrike",
 ]
 timestamp_override = "event.ingested"
 type = "eql"

rules/windows/command_and_control_screenconnect_childproc.toml

@@ -1,10 +1,10 @@
 [metadata]
 creation_date = "2024/03/27"
-integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "system"]
+integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "system", "crowdstrike"]
 maturity = "production"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 min_stack_version = "8.14.0"
-updated_date = "2024/10/17"
+updated_date = "2024/10/31"
 
 [rule]
 author = ["Elastic"]
@@ -13,7 +13,7 @@ Identifies suspicious processes being spawned by the ScreenConnect client proces
 abusing unauthorized access to the ScreenConnect remote access software.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.process-*", "winlogbeat-*", "logs-windows.sysmon_operational-*", "logs-system.security*", "endgame-*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*"]
+index = ["logs-endpoint.events.process-*", "winlogbeat-*", "logs-windows.sysmon_operational-*", "logs-system.security*", "endgame-*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*", "logs-crowdstrike.fdr*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Suspicious ScreenConnect Client Child Process"
@@ -33,6 +33,7 @@ tags = [
     "Data Source: SentinelOne",
     "Data Source: Microsoft Defender for Endpoint",
     "Data Source: System",
+    "Data Source: Crowdstrike",
 ]
 timestamp_override = "event.ingested"
 type = "eql"

rules/windows/command_and_control_tunnel_vscode.toml

@@ -1,10 +1,10 @@
 [metadata]
 creation_date = "2024/09/09"
-integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "system"]
+integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "system", "crowdstrike"]
 maturity = "production"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 min_stack_version = "8.14.0"
-updated_date = "2024/10/17"
+updated_date = "2024/10/31"
 
 [rule]
 author = ["Elastic"]
@@ -13,7 +13,7 @@ Detects the execution of the VScode portable binary with the tunnel command line
 attempt to establish a remote tunnel session to Github or a remote VScode instance.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.process-*", "winlogbeat-*", "logs-windows.sysmon_operational-*", "logs-system.security*", "endgame-*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*"]
+index = ["logs-endpoint.events.process-*", "winlogbeat-*", "logs-windows.sysmon_operational-*", "logs-system.security*", "endgame-*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*", "logs-crowdstrike.fdr*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Attempt to Establish VScode Remote Tunnel"
@@ -35,6 +35,7 @@ tags = [
     "Data Source: SentinelOne",
     "Data Source: Microsoft Defender for Endpoint",
     "Data Source: System",
+    "Data Source: Crowdstrike",
 ]
 timestamp_override = "event.ingested"
 type = "eql"

rules/windows/credential_access_domain_backup_dpapi_private_keys.toml

@@ -1,10 +1,10 @@
 [metadata]
 creation_date = "2020/08/13"
-integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender"]
+integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "crowdstrike"]
 maturity = "production"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 min_stack_version = "8.14.0"
-updated_date = "2024/10/15"
+updated_date = "2024/10/31"
 
 [rule]
 author = ["Elastic"]
@@ -13,7 +13,7 @@ Identifies the creation or modification of Domain Backup private keys. Adversari
 (DPAPI) domain backup key from a Domain Controller (DC) to be able to decrypt any domain user master key file.
 """
 from = "now-9m"
-index = ["winlogbeat-*", "logs-endpoint.events.file-*", "logs-windows.sysmon_operational-*", "endgame-*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*"]
+index = ["winlogbeat-*", "logs-endpoint.events.file-*", "logs-windows.sysmon_operational-*", "endgame-*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*", "logs-crowdstrike.fdr*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Creation or Modification of Domain Backup DPAPI private key"
@@ -27,16 +27,8 @@ references = [
 ]
 risk_score = 73
 rule_id = "b83a7e96-2eb3-4edf-8346-427b6858d3bd"
-setup = """## Setup
-
-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 version 8.2.
-Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
-`event.ingested` to @timestamp.
-For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
-"""
 severity = "high"
-tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Credential Access", "Data Source: Elastic Endgame", "Data Source: Elastic Defend", "Data Source: Sysmon", "Data Source: SentinelOne", "Data Source: Microsoft Defender for Endpoint"]
+tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Credential Access", "Data Source: Elastic Endgame", "Data Source: Elastic Defend", "Data Source: Sysmon", "Data Source: SentinelOne", "Data Source: Microsoft Defender for Endpoint", "Data Source: Crowdstrike"]
 timestamp_override = "event.ingested"
 type = "eql"
 

rules/windows/credential_access_kirbi_file.toml

@@ -1,10 +1,10 @@
 [metadata]
 creation_date = "2023/08/23"
-integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender"]
+integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "crowdstrike"]
 maturity = "production"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 min_stack_version = "8.14.0"
-updated_date = "2024/10/15"
+updated_date = "2024/10/31"
 
 [rule]
 author = ["Elastic"]
@@ -14,14 +14,14 @@ Kerberos ticket dump utilities, such as Mimikatz, and precedes attacks such as P
 attacker to impersonate users using Kerberos tickets.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.file-*", "logs-windows.sysmon_operational-*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*", "winlogbeat-*", "endgame-*"]
+index = ["logs-endpoint.events.file-*", "logs-windows.sysmon_operational-*", "logs-sentinel_one_cloud_funnel.*", "logs-m365_defender.event-*", "winlogbeat-*", "endgame-*", "logs-crowdstrike.fdr*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Kirbi File Creation"
 risk_score = 73
 rule_id = "b8f8da2d-a9dc-48c0-90e4-955c0aa1259a"
 severity = "high"
-tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Credential Access", "Data Source: Elastic Defend", "Data Source: Sysmon", "Data Source: SentinelOne", "Data Source: Microsoft Defender for Endpoint", "Data Source: Elastic Endgame"]
+tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Credential Access", "Data Source: Elastic Defend", "Data Source: Sysmon", "Data Source: SentinelOne", "Data Source: Microsoft Defender for Endpoint", "Data Source: Elastic Endgame", "Data Source: Crowdstrike"]
 timestamp_override = "event.ingested"
 type = "eql"
 

rules/windows/credential_access_relay_ntlm_auth_via_http_spoolss.toml

@@ -1,8 +1,8 @@
 [metadata]
 creation_date = "2022/04/30"
-integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel"]
+integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel", "crowdstrike"]
 maturity = "production"
-updated_date = "2024/10/15"
+updated_date = "2024/10/31"
 min_stack_version = "8.14.0"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 
@@ -22,6 +22,7 @@ index = [
     "logs-system.security*",
     "logs-m365_defender.event-*",
     "logs-sentinel_one_cloud_funnel.*",
+    "logs-crowdstrike.fdr*",
 ]
 language = "eql"
 license = "Elastic License v2"
@@ -46,6 +47,7 @@ tags = [
     "Data Source: Microsoft Defender for Endpoint",
     "Data Source: Sysmon",
     "Data Source: SentinelOne",
+    "Data Source: Crowdstrike",
 ]
 timestamp_override = "event.ingested"
 type = "eql"

rules/windows/defense_evasion_disable_windows_firewall_rules_with_netsh.toml

@@ -1,8 +1,8 @@
 [metadata]
 creation_date = "2020/02/18"
-integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel"]
+integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel", "crowdstrike"]
 maturity = "production"
-updated_date = "2024/10/15"
+updated_date = "2024/10/31"
 min_stack_version = "8.14.0"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 
@@ -22,6 +22,7 @@ index = [
     "logs-system.security*",
     "logs-m365_defender.event-*",
     "logs-sentinel_one_cloud_funnel.*",
+    "logs-crowdstrike.fdr*",
 ]
 language = "eql"
 license = "Elastic License v2"
@@ -71,6 +72,7 @@ tags = [
     "Data Source: Microsoft Defender for Endpoint",
     "Data Source: Sysmon",
     "Data Source: SentinelOne",
+    "Data Source: Crowdstrike",
 ]
 timestamp_override = "event.ingested"
 type = "eql"

rules/windows/defense_evasion_dotnet_compiler_parent_process.toml

@@ -1,8 +1,8 @@
 [metadata]
 creation_date = "2020/08/21"
-integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel"]
+integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel", "crowdstrike"]
 maturity = "production"
-updated_date = "2024/10/15"
+updated_date = "2024/10/31"
 min_stack_version = "8.14.0"
 min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 
@@ -22,20 +22,13 @@ index = [
     "logs-system.security*",
     "logs-m365_defender.event-*",
     "logs-sentinel_one_cloud_funnel.*",
+    "logs-crowdstrike.fdr*",
 ]
 language = "eql"
 license = "Elastic License v2"
 name = "Suspicious .NET Code Compilation"
 risk_score = 47
 rule_id = "201200f1-a99b-43fb-88ed-f65a45c4972c"
-setup = """## Setup
-
-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 version 8.2.
-Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
-`event.ingested` to @timestamp.
-For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
-"""
 severity = "medium"
 tags = [
     "Domain: Endpoint",
@@ -49,6 +42,7 @@ tags = [
     "Data Source: Microsoft Defender for Endpoint",
     "Data Source: Sysmon",
     "Data Source: SentinelOne",
+    "Data Source: Crowdstrike",
 ]
 timestamp_override = "event.ingested"
 type = "eql"

tests/test_all_rules.py

@@ -353,7 +353,8 @@ def test_required_tags(self):
             'logs-windows.powershell*': {'all': ['Data Source: PowerShell Logs']},
             'logs-sentinel_one_cloud_funnel.*': {'all': ['Data Source: SentinelOne']},
             'logs-fim.event-*': {'all': ['Data Source: File Integrity Monitoring']},
-            'logs-m365_defender.event-*': {'all': ['Data Source: Microsoft Defender for Endpoint']}
+            'logs-m365_defender.event-*': {'all': ['Data Source: Microsoft Defender for Endpoint']},
+            'logs-crowdstrike.fdr*': {'all': ['Data Source: Crowdstrike']}
         }
 
         for rule in self.all_rules: