Ruben Groenewoud
b6ed215958
* [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>
56 lines
2.2 KiB
TOML
56 lines
2.2 KiB
TOML
[metadata]
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creation_date = "2023/08/28"
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integration = ["endpoint"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2023/08/28"
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[rule]
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author = ["Elastic"]
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description = """
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This rule monitors for the creation of a file, followed by its execution and self-deletion in a short timespan within a
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directory often used for malicious purposes by threat actors. This behavior is often used by malware to execute
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malicious code and delete itself to hide its tracks.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "File Creation, Execution and Self-Deletion in Suspicious Directory"
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risk_score = 47
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rule_id = "09bc6c90-7501-494d-b015-5d988dc3f233"
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severity = "medium"
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tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Execution", "Data Source: Elastic Defend"]
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type = "eql"
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query = '''
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sequence by host.id, user.id with maxspan=1m
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[file where host.os.type == "linux" and event.action == "creation" and
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process.name in ("curl", "wget", "fetch", "ftp", "sftp", "scp", "rsync", "ld") and
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file.path : ("/dev/shm/*", "/run/shm/*", "/tmp/*", "/var/tmp/*",
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"/run/*", "/var/run/*", "/var/www/*", "/proc/*/fd/*")] by file.name
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[process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and
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process.parent.name in ("bash", "dash", "ash", "sh", "tcsh", "csh", "zsh", "ksh", "fish")] by process.name
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[file where host.os.type == "linux" and event.action == "deletion" and not process.name in ("rm", "ld") and
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file.path : ("/dev/shm/*", "/run/shm/*", "/tmp/*", "/var/tmp/*",
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"/run/*", "/var/run/*", "/var/www/*", "/proc/*/fd/*")] by file.name
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1059"
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name = "Command and Scripting Interpreter"
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reference = "https://attack.mitre.org/techniques/T1059/"
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[[rule.threat.technique.subtechnique]]
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id = "T1059.004"
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name = "Unix Shell"
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reference = "https://attack.mitre.org/techniques/T1059/004/"
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[rule.threat.tactic]
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id = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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