diff --git a/rules/cross-platform/privilege_escalation_sudo_buffer_overflow.toml b/rules/cross-platform/privilege_escalation_sudo_buffer_overflow.toml
new file mode 100644
index 000000000..82f3d680e
--- /dev/null
+++ b/rules/cross-platform/privilege_escalation_sudo_buffer_overflow.toml
@@ -0,0 +1,59 @@
+[metadata]
+creation_date = "2021/02/03"
+maturity = "production"
+updated_date = "2021/02/04"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies the attempted use of a heap-based buffer overflow vulnerability for the Sudo binary in Unix-like systems
+(CVE-2021-3156). Successful exploitation allows an unprivileged user to escalate to the root user.
+"""
+false_positives = [
+    """
+    This rule could generate false positives if the process arguments leveraged by the expoit are shared by custom
+    scripts using the Sudo or Sudoedit binaries. Only Sudo versions 1.8.2 through 1.8.31p2 and 1.9.0 through 1.9.5p1 are
+    affected; if those versions are not present on the endpoint, this could be a false positive.
+    """,
+]
+from = "now-9m"
+index = ["auditbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "Sudo Heap-Based Buffer Overflow Attempt"
+references = [
+    "https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-3156",
+    "https://blog.qualys.com/vulnerabilities-research/2021/01/26/cve-2021-3156-heap-based-buffer-overflow-in-sudo-baron-samedit",
+    "https://www.bleepingcomputer.com/news/security/latest-macos-big-sur-also-has-sudo-root-privilege-escalation-flaw",
+    "https://www.sudo.ws/alerts/unescape_overflow.html",
+]
+risk_score = 73
+rule_id = "f37f3054-d40b-49ac-aa9b-a786c74c58b8"
+severity = "high"
+tags = ["Elastic", "Host", "Linux", "macOS", "Threat Detection", "Privilege Escalation"]
+type = "threshold"
+
+query = '''
+event.category:process and event.type:start and
+  process.name:(sudo or sudoedit) and
+  process.args:(*\\ and ("-i" or "-s"))
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1068"
+name = "Exploitation for Privilege Escalation"
+reference = "https://attack.mitre.org/techniques/T1068/"
+
+
+[rule.threat.tactic]
+id = "TA0004"
+name = "Privilege Escalation"
+reference = "https://attack.mitre.org/tactics/TA0004/"
+
+[rule.threshold]
+field = "host.hostname"
+value = 100
+