[Tuning] Linux DR Tuning - Part 14 (#3467)

* [Tuning] Linux DR Tuning - Part 14

* Update privilege_escalation_sudo_cve_2019_14287.toml

---------

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>

rules/linux/privilege_escalation_sudo_cve_2019_14287.toml

@@ -1,10 +1,10 @@
 [metadata]
 creation_date = "2023/08/30"
-integration = ["endpoint"]
+integration = ["endpoint", "auditd_manager"]
 maturity = "production"
 min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 min_stack_version = "8.3.0"
-updated_date = "2023/11/02"
+updated_date = "2024/02/21"
 
 [rule]
 author = ["Elastic"]
@@ -15,7 +15,7 @@ that can be chosen arbitrarily. By using the sudo privileges, the command "sudo
 representing the root user. This exploit may work for sudo versions prior to v1.28.
 """
 from = "now-9m"
-index = ["logs-endpoint.events.*"]
+index = ["logs-endpoint.events.*", "endgame-*", "auditbeat-*", "logs-auditd_manager.auditd-*"]
 language = "eql"
 license = "Elastic License v2"
 name = "Potential Sudo Privilege Escalation via CVE-2019-14287"
@@ -49,12 +49,21 @@ For more details on Elastic Defend refer to the [helper guide](https://www.elast
 
 """
 severity = "medium"
-tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Privilege Escalation", "Data Source: Elastic Defend", "Use Case: Vulnerability"]
+tags = [
+        "Domain: Endpoint",
+        "OS: Linux",
+        "Use Case: Threat Detection",
+        "Tactic: Privilege Escalation",
+        "Data Source: Elastic Defend",
+        "Use Case: Vulnerability",
+        "Data Source: Elastic Endgame",
+        "Data Source: Auditd Manager"
+        ]
 timestamp_override = "event.ingested"
 type = "eql"
 query = '''
-process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and 
-process.name == "sudo" and process.args == "-u#-1"
+process where host.os.type == "linux" and event.action in ("exec", "exec_event", "executed", "process_started") and
+event.type == "start" and process.name == "sudo" and process.args == "-u#-1"
 '''
 
 [[rule.threat]]

rules/linux/privilege_escalation_sudo_hijacking.toml

@@ -4,7 +4,7 @@ integration = ["endpoint"]
 maturity = "production"
 min_stack_comments = "Multiple field support in the New Terms rule type was added in Elastic 8.6"
 min_stack_version = "8.6.0"
-updated_date = "2023/11/02"
+updated_date = "2024/02/21"
 
 [rule]
 author = ["Elastic"]
@@ -61,7 +61,7 @@ timestamp_override = "event.ingested"
 type = "new_terms"
 query = '''
 host.os.type:linux and event.category:file and event.type:("creation" or "file_create_event") and
-file.path:("/usr/bin/sudo" or "/bin/sudo") and not process.name:(docker or dockerd)
+file.path:("/usr/bin/sudo" or "/bin/sudo") and not process.name:(docker or dockerd or pacman)
 '''
 
 [[rule.threat]]

rules/linux/privilege_escalation_uid_elevation_from_unknown_executable.toml

@@ -4,7 +4,7 @@ integration = ["endpoint"]
 maturity = "production"
 min_stack_comments = "Multiple field support in the New Terms rule type was added in Elastic 8.6"
 min_stack_version = "8.6.0"
-updated_date = "2023/10/26"
+updated_date = "2024/02/21"
 
 [rule]
 author = ["Elastic"]
@@ -65,7 +65,8 @@ and process.parent.name:("bash" or "dash" or "sh" or "tcsh" or "csh" or "zsh" or
   ) or
   process.name:(
     "bash" or "dash" or "sh" or "tcsh" or "csh" or "zsh" or "ksh" or "fish" or "sudo" or "su" or "apt" or "apt-get" or
-    "aptitude" or "squid" or "snap" or "fusermount" or "pkexec" or "umount"
+    "aptitude" or "squid" or "snap" or "fusermount" or "pkexec" or "umount" or "master" or "omsbaseline" or "dzdo" or
+    "sandfly" or "logrotate"
   ) or
   process.args:/usr/bin/python*
 )

rules/linux/privilege_escalation_unshare_namespace_manipulation.toml

@@ -4,7 +4,7 @@ integration = ["endpoint"]
 maturity = "production"
 min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 min_stack_version = "8.3.0"
-updated_date = "2023/11/02"
+updated_date = "2024/02/22"
 
 [rule]
 author = ["Elastic"]
@@ -63,28 +63,32 @@ Auditbeat is a lightweight shipper that you can install on your servers to audit
 
 """
 severity = "medium"
-tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Privilege Escalation", "Data Source: Elastic Endgame", "Data Source: Elastic Defend"]
+tags = [
+        "Domain: Endpoint",
+        "OS: Linux",
+        "Use Case: Threat Detection",
+        "Tactic: Privilege Escalation",
+        "Data Source: Elastic Endgame",
+        "Data Source: Elastic Defend"
+        ]
 timestamp_override = "event.ingested"
 type = "eql"
-
 query = '''
 process where host.os.type == "linux" and event.type == "start" and event.action : ("exec", "exec_event") and
 process.executable: "/usr/bin/unshare" and
 not process.parent.executable: ("/usr/bin/udevadm", "*/lib/systemd/systemd-udevd", "/usr/bin/unshare") and
-not process.args : "/usr/bin/snap"
+not process.args == "/usr/bin/snap" and not process.parent.name in ("zz-proxmox-boot", "java")
 '''
 
-
 [[rule.threat]]
 framework = "MITRE ATT&CK"
+
 [[rule.threat.technique]]
 id = "T1543"
 name = "Create or Modify System Process"
 reference = "https://attack.mitre.org/techniques/T1543/"
 
-
 [rule.threat.tactic]
 id = "TA0004"
 name = "Privilege Escalation"
 reference = "https://attack.mitre.org/tactics/TA0004/"
-