Look for a file C:\Program Files\TeamViewer\Connections_incoming.txt This should be present for TeamViewer 10 and newer, not sure about older versions. In the TeamViewer Log files you already found, search for client hello received from - this will be followed by the TeamViewer ID that connected. Secure your computer. Change your password, prevent full control without approval. I believe TeamViewer has a fraud department you can report to if needed.
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