[New Rule] Shared Object Created (#2848)

* [New Rule] Shared Object Created or Changed * Removed sub technique * Update rules/linux/persistence_shared_object_creation.toml Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> * changed description slightly * Update rules/linux/persistence_shared_object_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update rules/linux/persistence_shared_object_creation.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * added T1574.006 --------- Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
2023-06-13 22:51:07 +02:00
parent 01334a28bd
commit b4a218ed1c
1 changed files with 63 additions and 0 deletions
@@ -0,0 +1,63 @@
+[metadata]
+creation_date = "2023/06/09"
+integration = ["endpoint"]
+maturity = "production"
+min_stack_comments = "New fields added: required_fields, related_integrations, setup, New Term"
+min_stack_version = "8.6.0"
+updated_date = "2023/06/09"
+
+[rule]
+author = ["Elastic"]
+description = """
+This rule monitors the creation of shared object files by previously unknown processes. The creation of a shared object 
+file involves compiling code into a dynamically linked library that can be loaded by other programs at runtime. While 
+this process is typically used for legitimate purposes, malicious actors can leverage shared object files to execute 
+unauthorized code, inject malicious functionality into legitimate processes, or bypass security controls. This allows 
+malware to persist on the system, evade detection, and potentially compromise the integrity and confidentiality of the 
+affected system and its data.
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*", "endgame-*"]
+language = "kuery"
+license = "Elastic License v2"
+name = "Shared Object Created or Changed by Previously Unknown Process"
+references = [
+    "https://threatpost.com/sneaky-malware-backdoors-linux/180158/"
+]
+risk_score = 47
+rule_id = "aebaa51f-2a91-4f6a-850b-b601db2293f4"
+severity = "medium"
+tags = ["Elastic", "Host", "Linux", "Threat Detection", "Persistence", "Elastic Endgame"]
+timestamp_override = "event.ingested"
+type = "new_terms"
+
+query = '''
+host.os.type : "linux" and event.action:("creation" or "file_create_event" or "rename" or "file_rename_event") and 
+file.path : (/usr/lib/* or /dev/shm/*) and file.extension : "so" and process.name : * and not 
+process.name : ("dpkg" or "dockerd" or "rpm" or "snapd" or "5")
+'''
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1574"
+name = "Hijack Execution Flow"
+reference = "https://attack.mitre.org/techniques/T1574/"
+
+[[rule.threat.technique.subtechnique]]
+id = "T1574.006"
+name = "Dynamic Linker Hijacking"
+reference = "https://attack.mitre.org/techniques/T1574/006/"
+
+[rule.threat.tactic]
+id = "TA0003"
+name = "Persistence"
+reference = "https://attack.mitre.org/tactics/TA0003/"
+
+[rule.new_terms]
+field = "new_terms_fields"
+value = ["file.path", "process.name"]
+
+[[rule.new_terms.history_window_start]]
+field = "history_window_start"
+value = "now-7d"