Colson Wilhoit
9995558b2a
* [New Rule] Dynamic Linker Copy * Update rules/linux/persistence_dynamic_linker_backup.toml * Update rules/linux/persistence_dynamic_linker_backup.toml * Update rules/linux/persistence_dynamic_linker_backup.toml
48 lines
1.6 KiB
TOML
48 lines
1.6 KiB
TOML
[metadata]
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creation_date = "2022/07/12"
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maturity = "production"
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updated_date = "2022/07/12"
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[rule]
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author = ["Elastic"]
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description = """
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Detects the copying of the Linux dynamic loader binary and subsequent file creation for the purpose of creating a backup copy. This technique was seen recently being utilized by Linux malware prior to patching the dynamic loader in order to inject and preload a malicious shared object file. This activity should never occur and if it does then it should be considered highly suspicious or malicious.
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"""
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from = "now-9m"
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index = ["logs-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Dynamic Linker Copy"
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references = [
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"https://www.intezer.com/blog/incident-response/orbit-new-undetected-linux-threat/"
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]
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risk_score = 85
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rule_id = "df6f62d9-caab-4b88-affa-044f4395a1e0"
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severity = "high"
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tags = ["Elastic", "Host", "Linux", "Threat Detection", "Persistence", "Orbit"]
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type = "eql"
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query = '''
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sequence by process.entity_id with maxspan=1m
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[process where event.type == "start" and process.name : ("cp", "rsync") and process.args : ("/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2", "/etc/ld.so.preload")]
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[file where event.action == "creation" and file.extension == "so"]
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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 = "T1574"
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name = "Hijack Execution Flow"
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reference = "https://attack.mitre.org/techniques/T1574/"
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[[rule.threat.technique.subtechnique]]
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id = "T1574.006"
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name = "Dynamic Linker Hijacking"
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reference = "https://attack.mitre.org/techniques/T1574/006/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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