diff --git a/rules/windows/defense_evasion_sccm_scnotification_dll.toml b/rules/windows/defense_evasion_sccm_scnotification_dll.toml new file mode 100644 index 000000000..faa114dbc --- /dev/null +++ b/rules/windows/defense_evasion_sccm_scnotification_dll.toml @@ -0,0 +1,49 @@ +[metadata] +creation_date = "2024/04/17" +integration = ["endpoint"] +maturity = "production" +min_stack_comments = "New fields added: required_fields, related_integrations, setup" +min_stack_version = "8.3.0" +updated_date = "2024/04/17" + +[rule] +author = ["Elastic"] +description = """ +This detection rule identifies when 'SCNotification.exe' loads an untrusted DLL, which is a potential indicator of an +attacker attempt to hijack/impersonate a Windows user session. +""" +from = "now-9m" +index = ["logs-endpoint.events.library-*"] +language = "eql" +license = "Elastic License v2" +name = "Potential Windows Session Hijacking via CcmExec" +references = [ + "https://cloud.google.com/blog/topics/threat-intelligence/windows-session-hijacking-via-ccmexec", + "https://mayfly277.github.io/posts/SCCM-LAB-part0x3/#impersonate-users---revshell-connected-users" +] +risk_score = 47 +rule_id = "e7357fec-6e9c-41b9-b93d-6e4fc40c7d47" +severity = "medium" +tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Data Source: Elastic Defend"] +timestamp_override = "event.ingested" +type = "eql" + +query = ''' +library where host.os.type == "windows" and process.name : "SCNotification.exe" and + (dll.Ext.relative_file_creation_time < 86400 or dll.Ext.relative_file_name_modify_time <= 500) and dll.code_signature.status != "trusted" +''' + + +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1574" +name = "Hijack Execution Flow" +reference = "https://attack.mitre.org/techniques/T1574/" + + +[rule.threat.tactic] +id = "TA0005" +name = "Defense Evasion" +reference = "https://attack.mitre.org/tactics/TA0005/" +