From b477255abebf885326784d0cf1a14e9f22b1cd99 Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Mon, 7 Dec 2020 20:16:17 +0100
Subject: [PATCH] [New Rule] Potential DNS Tunneling with Nslookup (#522)

* [New Rule] Potential DNS Tunneling with Nslookup

* adjusted tags

* Update rules/windows/command_and_control_dns_tunneling_nslookup.toml

Co-authored-by: Andrew Pease <7442091+peasead@users.noreply.github.com>

* Update rules/windows/command_and_control_dns_tunneling_nslookup.toml

Co-authored-by: Andrew Pease <7442091+peasead@users.noreply.github.com>

* ecs_version

* Update rules/windows/command_and_control_dns_tunneling_nslookup.toml

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>

* Update rules/windows/command_and_control_dns_tunneling_nslookup.toml

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>

* relinted

Co-authored-by: Andrew Pease <7442091+peasead@users.noreply.github.com>
Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
---
 ...nd_and_control_dns_tunneling_nslookup.toml | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 rules/windows/command_and_control_dns_tunneling_nslookup.toml

diff --git a/rules/windows/command_and_control_dns_tunneling_nslookup.toml b/rules/windows/command_and_control_dns_tunneling_nslookup.toml
new file mode 100644
index 000000000..dab12bf42
--- /dev/null
+++ b/rules/windows/command_and_control_dns_tunneling_nslookup.toml
@@ -0,0 +1,45 @@
+[metadata]
+creation_date = "2020/11/11"
+maturity = "production"
+updated_date = "2020/11/11"
+
+[rule]
+author = ["Elastic"]
+description = """
+This rule identifies a large number (15) of nslookup.exe executions with an explicit query type from the same host. This
+may indicate command and control activity utilizing the DNS protocol.
+"""
+from = "now-9m"
+index = ["winlogbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "Potential DNS Tunneling via NsLookup"
+references = ["https://unit42.paloaltonetworks.com/dns-tunneling-in-the-wild-overview-of-oilrigs-dns-tunneling/"]
+risk_score = 47
+rule_id = "3a59fc81-99d3-47ea-8cd6-d48d561fca20"
+severity = "medium"
+tags = ["Elastic", "Host", "Windows", "Threat Detection", "Command and Control"]
+type = "threshold"
+
+query = '''
+event.category:process and event.type:start and process.name:nslookup.exe and process.args:(-querytype=* or -qt=* or -q=* or -type=*)
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1071"
+name = "Application Layer Protocol"
+reference = "https://attack.mitre.org/techniques/T1071/"
+
+
+[rule.threat.tactic]
+id = "TA0011"
+name = "Command and Control"
+reference = "https://attack.mitre.org/tactics/TA0011/"
+
+[rule.threshold]
+field = "host.id"
+value = 15
+