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InformationalSplunk security contentRaven Tait +1

Windows XLL File Creation Outside of Typical Location

Detects the creation of an XLL file outside of typical locations. This can indicate an attempt to abuse Excel COM objects to load and execute a malicious XLL.

Detection logic

Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source category
sysmon_eventid_11

Known benign triggers

  • Some legitimate Excel add-ins and administrative tools may create XLL files outside typical locations. Review and allow approved applications to reduce false positives.

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