From 74a043d80ec6a071fb5f8631ab772a075cf00c95 Mon Sep 17 00:00:00 2001
From: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
Date: Wed, 18 Oct 2023 15:46:31 +0200
Subject: [PATCH] [New Rule] Pot. Network Scan Executed from Host (#3070)

(cherry picked from commit 7d674db11e4d8070895dba3915cc19f24d910936)
---
 .../linux/discovery_ping_sweep_detected.toml  | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 rules/linux/discovery_ping_sweep_detected.toml

diff --git a/rules/linux/discovery_ping_sweep_detected.toml b/rules/linux/discovery_ping_sweep_detected.toml
new file mode 100644
index 000000000..10131fed3
--- /dev/null
+++ b/rules/linux/discovery_ping_sweep_detected.toml
@@ -0,0 +1,51 @@
+[metadata]
+creation_date = "2023/09/04"
+integration = ["endpoint"]
+maturity = "production"
+min_stack_comments = "New fields added: required_fields, related_integrations, setup"
+min_stack_version = "8.3.0"
+updated_date = "2023/09/04"
+
+[rule]
+author = ["Elastic"]
+description = """
+This threshold rule monitors for the rapid execution of unix utilities that are capable of conducting network scans. 
+Adversaries may leverage built-in tools such as ping, netcat or socat to execute ping sweeps across the network while 
+attempting to evade detection or due to the lack of network mapping tools available on the compromised host. 
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License v2"
+name = "Potential Network Scan Executed From Host"
+risk_score = 47
+rule_id = "03c23d45-d3cb-4ad4-ab5d-b361ffe8724a"
+severity = "medium"
+tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Discovery", "Data Source: Elastic Defend"]
+timestamp_override = "event.ingested"
+type = "threshold"
+query = '''
+host.os.type:linux and event.action:exec and event.type:start and 
+process.name:(ping or nping or hping or hping2 or hping3 or nc or ncat or netcat or socat)
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1046"
+name = "Network Service Discovery"
+reference = "https://attack.mitre.org/techniques/T1046/"
+
+[rule.threat.tactic]
+id = "TA0007"
+name = "Discovery"
+reference = "https://attack.mitre.org/tactics/TA0007/"
+
+[rule.threshold]
+field = ["host.id", "process.parent.entity_id", "process.executable"]
+value = 1
+
+[[rule.threshold.cardinality]]
+field = "process.args"
+value = 100