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Windows Cisco Secure Endpoint Unblock File Via Sfc

The following analytic detects the use of the sfc.exe utility with the "-unblock" parameter, a feature within Cisco Secure Endpoint. The "-unblock" flag is used to remove system blocks imposed by the endpoint…

Description

The following analytic detects the use of the sfc.exe utility with the "-unblock" parameter, a feature within Cisco Secure Endpoint. The "-unblock" flag is used to remove system blocks imposed by the endpoint protection. This detection focuses on command-line activity that includes the "-unblock" parameter, as it may indicate an attempt to restore access to files or processes previously blocked by the security software. While this action could be legitimate in troubleshooting scenarios, malicious actors might use it to override protective measures, enabling execution of blocked malicious payloads or bypassing other security mechanisms.

Detection logic

Detection requirements

Platform
ContainersESXiIaaSLinuxmacOSNetwork DevicesWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Known benign triggers

  • It is possible that this action is executed during troubleshooting activity. Activity needs to be confirmed on a case by case basis.

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