[Rule Tuning] Linux 3rd Party EDR Support - Crowdstrike and S1 - 4 (#4345)

w0rk3r · Aegrah · web-flow · commit cc889e3bf203 · 2025-01-09T10:59:32.000-03:00
* [Rule Tuning] Linux 3rd Party EDR Support - Crowdstrike and S1 - 4

* Apply suggestions from code review

Co-authored-by: Ruben Groenewoud &lt;78494512+Aegrah@users.noreply.github.com&gt;

---------

Co-authored-by: Ruben Groenewoud &lt;78494512+Aegrah@users.noreply.github.com&gt;
diff --git a/rules/linux/command_and_control_linux_tunneling_and_port_forwarding.toml b/rules/linux/command_and_control_linux_tunneling_and_port_forwarding.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2023/08/23"
-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 = "2025/01/07"
 
 [transform]
 [[transform.osquery]]
@@ -39,7 +41,7 @@ and gain unauthorized access to internal resources, facilitating data exfiltrati
 control.
 """
 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 Linux Tunneling and/or Port Forwarding"
@@ -145,12 +147,14 @@ tags = [
     "Tactic: Command and Control",
     "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 where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event", "start", "ProcessRollup2") and (
   (
     // gost & pivotnacci - spawned without process.parent.name
     (process.name == "gost" and process.args : ("-L*", "-C*", "-R*")) or (process.name == "pivotnacci")) or (
diff --git a/rules/linux/credential_access_credential_dumping.toml b/rules/linux/credential_access_credential_dumping.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2023/02/27"
-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 = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
@@ -14,7 +16,7 @@ password-cracking utilities or prepare themselves for future operations by gathe
 victim.
 """
 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 Linux Credential Dumping via Unshadow"
@@ -54,12 +56,14 @@ tags = [
     "Tactic: Credential Access",
     "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 where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event", "start", "ProcessRollup2") and
 process.name == "unshadow" and process.args_count >= 3
 '''
 
diff --git a/rules/linux/credential_access_gdb_init_process_hooking.toml b/rules/linux/credential_access_gdb_init_process_hooking.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2023/08/30"
-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 = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
@@ -12,7 +14,7 @@ dumping techniques to attempt secret extraction from privileged processes. Tools
 "truffleproc" and "bash-memory-dump". This behavior should not happen by default, and should be investigated thoroughly.
 """
 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 = "Linux init (PID 1) Secret Dump via GDB"
@@ -52,12 +54,14 @@ tags = [
     "Tactic: Credential Access",
     "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 where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event", "start", "ProcessRollup2") and 
 process.name == "gdb" and process.args in ("--pid", "-p") and process.args == "1"
 '''
 
diff --git a/rules/linux/credential_access_gdb_process_hooking.toml b/rules/linux/credential_access_gdb_process_hooking.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2023/08/30"
-integration = ["endpoint", "auditd_manager"]
+integration = ["endpoint", "auditd_manager", "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 = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
@@ -12,7 +14,7 @@ secret extraction from privileged processes. Tools that display this behavior in
 "bash-memory-dump". This behavior should not happen by default, and should be investigated thoroughly.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*"]
+index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*", "logs-crowdstrike.fdr*", "logs-sentinel_one_cloud_funnel.*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Linux Process Hooking via GDB"
@@ -28,12 +30,14 @@ tags = [
     "Data Source: Elastic Defend",
     "Data Source: Elastic Endgame",
     "Data Source: Auditd Manager",
+    "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", "executed", "process_started")
+process where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event", "start", "ProcessRollup2", "executed", "process_started")
  and process.name == "gdb" and process.args in ("--pid", "-p") and 
 /* Covered by d4ff2f53-c802-4d2e-9fb9-9ecc08356c3f */
 process.args != "1"
diff --git a/rules/linux/credential_access_proc_credential_dumping.toml b/rules/linux/credential_access_proc_credential_dumping.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2023/04/26"
-integration = ["endpoint"]
+integration = ["endpoint", "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 = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
@@ -13,7 +15,7 @@ known vulnerability CVE-2018-20781. Malicious actors can exploit the cleartext c
 process and extracting lines that have a high probability of containing cleartext passwords.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.*"]
+index = ["logs-endpoint.events.*", "logs-sentinel_one_cloud_funnel.*", "endgame-*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Potential Linux Credential Dumping via Proc Filesystem"
@@ -56,14 +58,16 @@ tags = [
     "Tactic: Credential Access",
     "Use Case: Vulnerability",
     "Data Source: Elastic Defend",
+    "Data Source: SentinelOne",
+    "Data Source: Elastic Endgame",
 ]
 type = "eql"
 
 query = '''
 sequence by host.id, process.parent.name with maxspan=1m
-  [process where host.os.type == "linux" and process.name == "ps" and event.action == "exec"
+  [process where host.os.type == "linux" and process.name == "ps" and event.action in ("exec", "start", "exec_event")
    and process.args in ("-eo", "pid", "command")]
-  [process where host.os.type == "linux" and process.name == "strings" and event.action == "exec"
+  [process where host.os.type == "linux" and process.name == "strings" and event.action in ("exec", "start", "exec_event")
    and process.args : "/tmp/*"]
 '''
 
diff --git a/rules/linux/defense_evasion_acl_modification_via_setfacl.toml b/rules/linux/defense_evasion_acl_modification_via_setfacl.toml
@@ -1,16 +1,18 @@
 [metadata]
 creation_date = "2024/08/23"
-integration = ["endpoint", "auditd_manager"]
+integration = ["endpoint", "auditd_manager", "crowdstrike", "sentinel_one_cloud_funnel"]
 maturity = "production"
-updated_date = "2024/10/18"
+min_stack_version = "8.13.0"
+min_stack_comments = "Breaking change at 8.13.0 for SentinelOne Integration."
+updated_date = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
 description = """
 This rule detects Linux Access Control List (ACL) modification via the setfacl command.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*"]
+index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*", "logs-crowdstrike.fdr*", "logs-sentinel_one_cloud_funnel.*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Access Control List Modification via setfacl"
@@ -26,12 +28,14 @@ tags = [
     "Data Source: Elastic Defend",
     "Data Source: Elastic Endgame",
     "Data Source: Auditd Manager",
+    "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", "executed", "process_started") and
+event.action in ("exec", "exec_event", "start", "ProcessRollup2", "executed", "process_started") and
 process.name == "setfacl" and not (
   process.command_line == "/bin/setfacl --restore=-" or
   process.args == "/var/log/journal/"
diff --git a/rules/linux/defense_evasion_attempt_to_disable_auditd_service.toml b/rules/linux/defense_evasion_attempt_to_disable_auditd_service.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2024/08/28"
-integration = ["endpoint"]
+integration = ["endpoint", "crowdstrike", "sentinel_one_cloud_funnel"]
 maturity = "production"
-updated_date = "2024/08/28"
+min_stack_version = "8.13.0"
+min_stack_comments = "Breaking change at 8.13.0 for SentinelOne Integration."
+updated_date = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
@@ -12,7 +14,7 @@ provides system auditing and logging. Disabling the Auditd service can prevent t
 security events, which can be used to detect malicious activity.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.process*", "endgame-*"]
+index = ["logs-endpoint.events.process*", "endgame-*", "logs-crowdstrike.fdr*", "logs-sentinel_one_cloud_funnel.*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Attempt to Disable Auditd Service"
@@ -51,11 +53,13 @@ tags = [
     "Tactic: Defense Evasion",
     "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 where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event", "start", "ProcessRollup2") and (
   (process.name == "service" and process.args == "stop") or
   (process.name == "chkconfig" and process.args == "off") or
   (process.name == "systemctl" and process.args in ("disable", "stop", "kill"))
diff --git a/rules/linux/defense_evasion_attempt_to_disable_iptables_or_firewall.toml b/rules/linux/defense_evasion_attempt_to_disable_iptables_or_firewall.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2023/02/22"
-integration = ["endpoint"]
+integration = ["endpoint", "sentinel_one_cloud_funnel"]
 maturity = "production"
-updated_date = "2024/09/23"
+min_stack_version = "8.13.0"
+min_stack_comments = "Breaking change at 8.13.0 for SentinelOne Integration."
+updated_date = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
@@ -11,7 +13,7 @@ Adversaries may attempt to disable the iptables or firewall service in an attemp
 receive or send network traffic.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.*", "endgame-*"]
+index = ["logs-endpoint.events.*", "endgame-*", "logs-sentinel_one_cloud_funnel.*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Attempt to Disable IPTables or Firewall"
@@ -51,12 +53,13 @@ tags = [
     "Tactic: Defense Evasion",
     "Data Source: Elastic Defend",
     "Data Source: Elastic Endgame",
+    "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 where host.os.type == "linux" and event.type == "start" and event.action in ("exec", "exec_event", "start") and
   (
    /* disable FW */
    (
diff --git a/rules/linux/defense_evasion_attempt_to_disable_syslog_service.toml b/rules/linux/defense_evasion_attempt_to_disable_syslog_service.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2020/04/27"
-integration = ["endpoint"]
+integration = ["endpoint", "crowdstrike", "sentinel_one_cloud_funnel"]
 maturity = "production"
-updated_date = "2024/09/23"
+min_stack_version = "8.13.0"
+min_stack_comments = "Breaking change at 8.13.0 for SentinelOne Integration."
+updated_date = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
@@ -11,7 +13,7 @@ Adversaries may attempt to disable the syslog service in an attempt to an attemp
 detection by security controls.
 """
 from = "now-9m"
-index = ["auditbeat-*", "logs-endpoint.events.*", "endgame-*"]
+index = ["auditbeat-*", "logs-endpoint.events.*", "endgame-*", "logs-crowdstrike.fdr*", "logs-sentinel_one_cloud_funnel.*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Attempt to Disable Syslog Service"
@@ -63,16 +65,18 @@ tags = [
     "Tactic: Defense Evasion",
     "Data Source: Elastic Endgame",
     "Data Source: Elastic Defend",
+    "Data Source: Crowdstrike",
+    "Data Source: SentinelOne",
 ]
 timestamp_override = "event.ingested"
 type = "eql"
 
 query = '''
-process where host.os.type == "linux" and event.action in ("exec", "exec_event") and
+process where host.os.type == "linux" and event.action in ("exec", "exec_event", "start", "ProcessRollup2") and
  ( (process.name == "service" and process.args == "stop") or
    (process.name == "chkconfig" and process.args == "off") or
    (process.name == "systemctl" and process.args in ("disable", "stop", "kill"))
- ) and process.args in ("syslog", "rsyslog", "syslog-ng")
+ ) and process.args in ("syslog", "rsyslog", "syslog-ng", "syslog.service", "rsyslog.service", "syslog-ng.service")
 '''
 
 
diff --git a/rules/linux/defense_evasion_base16_or_base32_encoding_or_decoding_activity.toml b/rules/linux/defense_evasion_base16_or_base32_encoding_or_decoding_activity.toml
@@ -1,8 +1,10 @@
 [metadata]
 creation_date = "2020/04/17"
-integration = ["endpoint", "auditd_manager"]
+integration = ["endpoint", "auditd_manager", "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 = "2025/01/07"
 
 [rule]
 author = ["Elastic"]
@@ -14,7 +16,7 @@ false_positives = [
     """,
 ]
 from = "now-9m"
-index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*"]
+index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*", "logs-crowdstrike.fdr*", "logs-sentinel_one_cloud_funnel.*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Base16 or Base32 Encoding/Decoding Activity"
@@ -66,13 +68,16 @@ tags = [
     "Data Source: Elastic Endgame",
     "Data Source: Elastic Defend",
     "Data Source: Auditd Manager",
+    "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", "executed", "process_started")
- and process.name in ("base16", "base32", "base32plain", "base32hex") and
+process where host.os.type == "linux" and event.type == "start" and
+ event.action in ("exec", "exec_event", "start", "ProcessRollup2", "executed", "process_started") and
+ process.name in ("base16", "base32", "base32plain", "base32hex") and
 not process.args in ("--help", "--version")
 '''
 
