diff --git a/rules/windows/defense_evasion_process_termination_followed_by_deletion.toml b/rules/windows/defense_evasion_process_termination_followed_by_deletion.toml new file mode 100644 index 000000000..b6fd1d61e --- /dev/null +++ b/rules/windows/defense_evasion_process_termination_followed_by_deletion.toml @@ -0,0 +1,45 @@ +[metadata] +creation_date = "2020/11/04" +maturity = "production" +updated_date = "2020/11/04" + +[rule] +author = ["Elastic"] +description = """ +Identifies a process termination event quickly followed by the deletion of its executable file. Malware tools and other non-native +files dropped or created on a system by an adversary may leave traces to indicate to what occurred. Removal of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the +adversary's footprint. +""" +from = "now-9m" +index = ["logs-endpoint.events.*"] +language = "eql" +license = "Elastic License" +name = "Process Termination followed by Deletion" +risk_score = 47 +rule_id = "09443c92-46b3-45a4-8f25-383b028b258d" +severity = "medium" +tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"] +type = "eql" + +query = ''' +sequence by host.id with maxspan=5s + [process where event.type == "end" and + process.code_signature.trusted == false and + not process.executable : ("C:\\Windows\\SoftwareDistribution\\*.exe", "C:\\Windows\\WinSxS\\*.exe") + ] by process.executable + [file where event.type == "deletion" and file.extension : ("exe", "scr", "com")] by file.path +''' + + +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1070" +name = "Indicator Removal on Host" +reference = "https://attack.mitre.org/techniques/T1070/" + + +[rule.threat.tactic] +id = "TA0005" +name = "Defense Evasion" +reference = "https://attack.mitre.org/tactics/TA0005/"