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Deployable detection rules

1 vendor-native detections · ready to paste into your SIEM · cross-linked to ATT&CK
technique T1091 ×

Detections

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Elastic EQL low T1091 ↗
Execution from a Removable Media with Network Connection
Identifies process execution from a removable media and by an unusual process. Adversaries may move onto systems, possibly those on disconnected or air-gapped networks, by copying malware to removable media and taking advantage of Autorun features when the media is inserted into a system and executes.
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sequence by process.entity_id with maxspan=5m
 [process where host.os.type == "windows" and event.action == "start" and

  /* Direct Exec from USB */
  (process.Ext.device.bus_type : "usb" or process.Ext.device.product_id : "USB *") and
  (process.code_signature.trusted == false or process.code_signature.exists == false) and

  not process.code_signature.status : ("errorExpired", "errorCode_endpoint*")]
 [network where host.os.type == "windows" and event.action == "connection_attempted"]
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