diff --git a/rules/macos/persistence_emond_rules_file_creation.toml b/rules/macos/persistence_emond_rules_file_creation.toml new file mode 100644 index 000000000..216ef5c03 --- /dev/null +++ b/rules/macos/persistence_emond_rules_file_creation.toml @@ -0,0 +1,47 @@ +[metadata] +creation_date = "2021/01/11" +maturity = "production" +updated_date = "2021/01/11" + +[rule] +author = ["Elastic"] +description = """ +Identifies the creation or modification of the Event Monitor Daemon (emond) rules. Adversaries may abuse this service by +writing a rule to execute commands when a defined event occurs, such as system start up or user authentication. +""" +from = "now-9m" +index = ["auditbeat-*", "logs-endpoint.events.*"] +language = "eql" +license = "Elastic License" +name = "Emond Rules Creation or Modification" +references = ["https://www.xorrior.com/emond-persistence/"] +risk_score = 47 +rule_id = "a6bf4dd4-743e-4da8-8c03-3ebd753a6c90" +severity = "medium" +tags = ["Elastic", "Host", "macOS", "Threat Detection", "Persistence"] +type = "eql" + +query = ''' +file where event.type != "deletion" and + file.path : ("/private/etc/emond.d/rules/*.plist", "/etc/emon.d/rules/*.plist") +''' + + +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1546" +name = "Event Triggered Execution" +reference = "https://attack.mitre.org/techniques/T1546/" +[[rule.threat.technique.subtechnique]] +id = "T1546.014" +name = "Emond" +reference = "https://attack.mitre.org/techniques/T1546/014/" + + + +[rule.threat.tactic] +id = "TA0003" +name = "Persistence" +reference = "https://attack.mitre.org/tactics/TA0003/" + diff --git a/rules/macos/persistence_emond_rules_process_execution.toml b/rules/macos/persistence_emond_rules_process_execution.toml new file mode 100644 index 000000000..bb0da753c --- /dev/null +++ b/rules/macos/persistence_emond_rules_process_execution.toml @@ -0,0 +1,71 @@ +[metadata] +creation_date = "2021/01/11" +maturity = "production" +updated_date = "2021/01/11" + +[rule] +author = ["Elastic"] +description = """ +Identifies the execution of a suspicious child process of the Event Monitor Daemon (emond). Adversaries may abuse this +service by writing a rule to execute commands when a defined event occurs, such as system start up or user +authentication. +""" +from = "now-9m" +index = ["logs-endpoint.events.*"] +language = "eql" +license = "Elastic License" +name = "Suspicious Emond Child Process" +references = ["https://www.xorrior.com/emond-persistence/"] +risk_score = 47 +rule_id = "3e3d15c6-1509-479a-b125-21718372157e" +severity = "medium" +tags = ["Elastic", "Host", "macOS", "Threat Detection", "Execution", "Persistence"] +type = "eql" + +query = ''' +process where event.type in ("start", "process_started") and + process.parent.name : "emond" and + process.name : ( + "bash", + "dash", + "sh", + "tcsh", + "csh", + "zsh", + "ksh", + "fish", + "Python", + "python*", + "perl*", + "php*", + "osascript", + "pwsh", + "curl", + "wget", + "cp", + "mv", + "touch", + "echo", + "base64", + "launchctl") +''' + + +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1546" +name = "Event Triggered Execution" +reference = "https://attack.mitre.org/techniques/T1546/" +[[rule.threat.technique.subtechnique]] +id = "T1546.014" +name = "Emond" +reference = "https://attack.mitre.org/techniques/T1546/014/" + + + +[rule.threat.tactic] +id = "TA0003" +name = "Persistence" +reference = "https://attack.mitre.org/tactics/TA0003/" +