Updation of Mitre Tactic and Threats (#1850)

Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>

rules/linux/execution_expect_binary.toml

@@ -0,0 +1,50 @@
+[metadata]
+creation_date = "2022/03/07"
+maturity = "development"
+updated_date = "2022/03/17"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies Linux binary expect abuse to break out from restricted environments by spawning an interactive system shell
+This activity is not standard use with this binary for a user or system administrator and could potentially indicate
+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 the expect command"
+references = ["https://gtfobins.github.io/gtfobins/expect/"]
+risk_score = 47
+rule_id = "fd3fc25e-7c7c-4613-8209-97942ac609f6"
+severity = "medium"
+tags = ["Elastic", "Host", "Linux", "Threat Detection", "Execution", "GTFOBins"]
+timestamp_override = "event.ingested"
+type = "eql"
+
+query = '''
+sequence by host.id, process.pid with maxspan=1m 
+[process where process.name == "expect" and process.args : "-c" and process.args : ("spawn /bin/sh;interact", "spawn /bin/bash;interact", "spawn /bin/dash;interact", "spawn sh;interact","spawn bash;interact", "spawn dash;interact")] 
+[process where process.parent.name == "expect" and process.name : ("bash", "sh", "dash")]
+'''
+
+
+[[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/"
+