Emerging Threathightest

Potential CVE-2021-40444 Exploitation Attempt

Detects potential exploitation of CVE-2021-40444 via suspicious process patterns seen in in-the-wild exploitations

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Florian Roth (Nextron Systems)Created Wed Sep 08Updated Sat Feb 04894397c6-da03-425c-a589-3d09e7d1f7502021

Emerging Threat

Active Threat

Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection:
        Image|endswith: '\control.exe'
        ParentImage|endswith:
            - '\winword.exe'
            - '\powerpnt.exe'
            - '\excel.exe'
    filter:
        CommandLine|endswith:
            - '\control.exe input.dll'
            - '\control.exe" input.dll'
    condition: selection and not filter