diff --git a/rules/linux/execution_flock_binary.toml b/rules/linux/execution_flock_binary.toml
new file mode 100644
index 000000000..81dbaaa1a
--- /dev/null
+++ b/rules/linux/execution_flock_binary.toml
@@ -0,0 +1,49 @@
+[metadata]
+creation_date = "2022/03/22"
+maturity = "production"
+updated_date = "2022/03/22"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies Linux binary flock abuse to break out from restricted environments by spawning an interactive system
+shell.The flock utility allows us to manage advisory file locks in shell scripts or on the command line and the activity
+of spawing a shell is not a standard use of this binary by a user or system administrator. It indicates a potentially
+malicious actor attempting to improve the capabilities or stability of their access.
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*"]
+language = "eql"
+license = "Elastic License v2"
+name = "Linux Restricted Shell Breakout via flock Shell evasion"
+references = ["https://gtfobins.github.io/gtfobins/flock/"]
+risk_score = 47
+rule_id = "f52362cd-baf1-4b6d-84be-064efc826461"
+severity = "medium"
+tags = ["Elastic", "Host", "Linux", "Threat Detection", "Execution", "GTFOBins"]
+timestamp_override = "event.ingested"
+type = "eql"
+
+query = '''
+process where event.type == "start" and process.parent.name == "flock" and process.parent.args == "-u" and process.parent.args == "/" and process.parent.args in ("/bin/sh", "/bin/bash", "/bin/dash", "sh", "bash", "dash") and process.name in ("bash", "dash", "sh")
+'''
+
+
+[[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.tactic]
+id = "TA0002"
+name = "Execution"
+reference = "https://attack.mitre.org/tactics/TA0002/"
+