[New BBR] Suspicious Clipboard Activity (#2970)

* [New BBR] Suspicious Clipboard Activity

* Added new line to end of file

* Update rules_building_block/collection_linux_suspicious_clipboard_activity.toml

Co-authored-by: Justin Ibarra <[email protected]>

* Update rules_building_block/collection_linux_suspicious_clipboard_activity.toml

Co-authored-by: Justin Ibarra <[email protected]>

---------

Co-authored-by: Justin Ibarra <[email protected]>

Author: Aegrah

rules_building_block/collection_linux_suspicious_clipboard_activity.toml

@@ -0,0 +1,52 @@
+[metadata]
+creation_date = "2023/07/27"
+integration = ["endpoint"]
+maturity = "production"
+min_stack_comments = "Multiple field support in the New Terms rule type was added in Elastic 8.6"
+min_stack_version = "8.6.0"
+updated_date = "2023/07/27"
+
+[rule]
+author = ["Elastic"]
+description = """
+This rule monitors for the usage of the most common clipboard utilities on unix systems by an uncommon process group 
+leader. Adversaries may collect data stored in the clipboard from users copying information within or between 
+applications. 
+"""
+from = "now-119m"
+interval = "60m"
+index = ["logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License v2"
+name = "Potential Suspicious Clipboard Activity Detected"
+risk_score = 21
+rule_id = "884e87cc-c67b-4c90-a4ed-e1e24a940c82"
+severity = "low"
+tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Collection", "Rule Type: BBR"]
+type = "new_terms"
+building_block_type = "default"
+query = '''
+event.category:process and host.os.type:"linux" and event.action:"exec" and event.type:"start" and 
+process.name:("xclip" or "xsel" or "wl-clipboard" or "clipman" or "copyq")
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+
+[[rule.threat.technique]]
+id = "T1115"
+name = "Clipboard Data"
+reference = "https://attack.mitre.org/techniques/T1115/"
+
+[rule.threat.tactic]
+id = "TA0009"
+name = "Collection"
+reference = "https://attack.mitre.org/tactics/TA0009/"
+
+[rule.new_terms]
+field = "new_terms_fields"
+value = ["host.id", "process.group_leader.executable"]
+
+[[rule.new_terms.history_window_start]]
+field = "history_window_start"
+value = "now-7d"