[Rule Tuning] File Deletion via Shred

Author: Aegrah

rules/linux/defense_evasion_file_deletion_via_shred.toml

@@ -2,7 +2,7 @@
 creation_date = "2020/04/27"
 integration = ["endpoint", "crowdstrike", "sentinel_one_cloud_funnel"]
 maturity = "production"
-updated_date = "2025/03/20"
+updated_date = "2025/12/01"
 
 [rule]
 author = ["Elastic"]
@@ -98,8 +98,8 @@ timestamp_override = "event.ingested"
 type = "eql"
 
 query = '''
-process where host.os.type == "linux" and event.type == "start" and process.name == "shred" and process.args in (
-  "-u", "--remove", "-z", "--zero"
+process where host.os.type == "linux" and event.type == "start" and process.name == "shred" and process.args like (
+  "-*u*", "--remove", "-*z*", "--zero"
 ) and not process.parent.name == "logrotate"
 '''
 

rules/linux/execution_suspicious_pod_or_container_creation_command_execution.toml

@@ -0,0 +1,116 @@
+[metadata]
+creation_date = "2025/12/01"
+integration = ["endpoint", "auditd_manager", "crowdstrike", "sentinel_one_cloud_funnel"]
+maturity = "production"
+updated_date = "2025/12/01"
+
+[rule]
+author = ["Elastic"]
+description = """
+This rule detects the creation of pods or containers that execute suspicious commands often associated with persistence or
+privilege escalation techniques. Attackers may use container orchestration tools like Kubernetes ("kubectl") or container
+runtimes like Docker ("docker") to create pods or containers that run shell commands (e.g., "bash", "sh", "zsh") with
+arguments that indicate attempts to establish persistence (e.g., modifying startup scripts, creating backdoors).
+"""
+from = "now-9m"
+index = [
+    "auditbeat-*",
+    "endgame-*",
+    "logs-auditd_manager.auditd-*",
+    "logs-crowdstrike.fdr*",
+    "logs-endpoint.events.process*",
+    "logs-sentinel_one_cloud_funnel.*",
+]
+language = "eql"
+license = "Elastic License v2"
+name = "Pod or Container Creation with Suspicious Command-Line"
+risk_score = 47
+rule_id = "c595363f-52a6-49e1-9257-0e08ae043dbd"
+severity = "medium"
+tags = [
+    "Domain: Endpoint",
+    "Domain: Container",
+    "OS: Linux",
+    "Use Case: Threat Detection",
+    "Tactic: Execution",
+    "Tactic: Privilege Escalation",
+    "Tactic: Persistence",
+    "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 event.type == "start" and event.action in ("exec", "exec_event", "start", "ProcessRollup2", "executed", "process_started") and (
+  (process.name == "kubectl" and process.args == "run" and process.args == "--restart=Never" and process.args == "--" and process.args in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")) or
+  (process.name == "docker")
+) and process.command_line like~ (
+  "*atd*", "*cron*", "*/etc/rc.local*", "*/dev/tcp/*", "*/etc/init.d*", "*/etc/update-motd.d*", "*/etc/ld.so*", "*/etc/sudoers*", "*base64 *",
+  "*/etc/profile*", "*/etc/ssh*", "*/home/*/.ssh/*", "*/root/.ssh*" , "*~/.ssh/*", "*autostart*", "*xxd *", "*/etc/shadow*", "*./.*",
+  "*import*pty*spawn*", "*import*subprocess*call*", "*TCPSocket.new*", "*TCPSocket.open*", "*io.popen*", "*os.execute*", "*fsockopen*",
+  "*disown*", "* ncat *", "* nc *", "* netcat *",  "* nc.traditional *", "*socat*", "*telnet*", "*/tmp/*", "*/dev/shm/*", "*/var/tmp/*",
+  "*/boot/*", "*/sys/*", "*/lost+found/*", "*/media/*", "*/proc/*", "*/var/backups/*", "*/var/log/*", "*/var/mail/*", "*/var/spool/*"
+)
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1059"
+name = "Command and Scripting Interpreter"
+reference = "https://attack.mitre.org/techniques/T1059/"
+
+[[rule.threat.technique.subtechnique]]
+id = "T1059.004"
+name = "Unix Shell"
+reference = "https://attack.mitre.org/techniques/T1059/004/"
+
+[[rule.threat.technique]]
+id = "T1609"
+name = "Container Administration Command"
+reference = "https://attack.mitre.org/techniques/T1609/"
+
+[rule.threat.tactic]
+id = "TA0002"
+name = "Execution"
+reference = "https://attack.mitre.org/tactics/TA0002/"
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1611"
+name = "Escape to Host"
+reference = "https://attack.mitre.org/techniques/T1611/"
+
+[rule.threat.tactic]
+id = "TA0004"
+name = "Privilege Escalation"
+reference = "https://attack.mitre.org/tactics/TA0004/"
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1053"
+name = "Scheduled Task/Job"
+reference = "https://attack.mitre.org/techniques/T1053/"
+
+[[rule.threat.technique.subtechnique]]
+id = "T1053.002"
+name = "At"
+reference = "https://attack.mitre.org/techniques/T1053/002/"
+
+[[rule.threat.technique.subtechnique]]
+id = "T1053.003"
+name = "Cron"
+reference = "https://attack.mitre.org/techniques/T1053/003/"
+
+[rule.threat.tactic]
+id = "TA0003"
+name = "Persistence"
+reference = "https://attack.mitre.org/tactics/TA0003/"