[metadata] creation_date = "2020/03/25" ecs_version = ["1.5.0"] maturity = "production" updated_date = "2020/03/25" [rule] anomaly_threshold = 50 author = ["Elastic"] description = """ Identifies unusual parent-child process relationships that can indicate malware execution or persistence mechanisms. Malicious scripts often call on other applications and processes as part of their exploit payload. For example, when a malicious Office document runs scripts as part of an exploit payload, Excel or Word may start a script interpreter process, which, in turn, runs a script that downloads and executes malware. Another common scenario is Outlook running an unusual process when malware is downloaded in an email. Monitoring and identifying anomalous process relationships is a method of detecting new and emerging malware that is not yet recognized by anti-virus scanners. """ false_positives = [ """ Users running scripts in the course of technical support operations of software upgrades could trigger this signal. A newly installed program or one that runs rarely as part of a monthly or quarterly workflow could trigger this signal. """, ] from = "now-45m" interval = "15m" license = "Elastic License" machine_learning_job_id = "windows_anomalous_process_creation" name = "Anomalous Windows Process Creation" references = ["https://www.elastic.co/guide/en/siem/guide/current/prebuilt-ml-jobs.html"] risk_score = 21 rule_id = "0b29cab4-dbbd-4a3f-9e8e-1287c7c11ae5" severity = "low" tags = ["Elastic", "ML", "Windows"] type = "machine_learning"