[New Rule] File Creation, Exec and Self-Deletion (#3045)

* [New Rule] File Creation, Exec and Self-Deletion * Update execution_file_execution_followed_by_deletion.toml * Update execution_file_execution_followed_by_deletion.toml * Update execution_file_execution_followed_by_deletion.toml * Update execution_file_execution_followed_by_deletion.toml --------- Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com>
2023-08-31 17:32:17 +02:00
parent 3588600d57
commit b6ed215958
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+[metadata]
+creation_date = "2023/08/28"
+integration = ["endpoint"]
+maturity = "production"
+min_stack_comments = "New fields added: required_fields, related_integrations, setup"
+min_stack_version = "8.3.0"
+updated_date = "2023/08/28"
+
+[rule]
+author = ["Elastic"]
+description = """
+This rule monitors for the creation of a file, followed by its execution and self-deletion in a short timespan within a
+directory often used for malicious purposes by threat actors. This behavior is often used by malware to execute 
+malicious code and delete itself to hide its tracks.
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*"]
+language = "eql"
+license = "Elastic License v2"
+name = "File Creation, Execution and Self-Deletion in Suspicious Directory"
+risk_score = 47
+rule_id = "09bc6c90-7501-494d-b015-5d988dc3f233"
+severity = "medium"
+tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Execution", "Data Source: Elastic Defend"]
+type = "eql"
+query = '''
+sequence by host.id, user.id with maxspan=1m
+  [file where host.os.type == "linux" and event.action == "creation" and 
+   process.name in ("curl", "wget", "fetch", "ftp", "sftp", "scp", "rsync", "ld") and 
+   file.path : ("/dev/shm/*", "/run/shm/*", "/tmp/*", "/var/tmp/*",
+     "/run/*", "/var/run/*", "/var/www/*", "/proc/*/fd/*")] by file.name
+  [process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and 
+   process.parent.name in ("bash", "dash", "ash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")] by process.name
+  [file where host.os.type == "linux" and event.action == "deletion" and not process.name in ("rm", "ld") and 
+   file.path : ("/dev/shm/*", "/run/shm/*", "/tmp/*", "/var/tmp/*",
+     "/run/*", "/var/run/*", "/var/www/*", "/proc/*/fd/*")] by file.name
+'''
+
+[[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/"