Sysmon v10.41 creates duplicate event 1 when WSL is enabled.

Kurt Lin 1 Reputation point
2021-10-01T02:26:34.737+00:00

Hello,

Before I enable wsl1 in my Windows10 host, Sysmon logs event 1 properly. For example, if I open a snipping tool, Sysmon will log a process creation event for it just like the following figure
(The three colums are winlog.event_data.Image , winlog.event_data.CommandLine and winlog.event_data.UtcTime respectively):
136824-image.png

After I enable the WSL1 feature, the same snipping tool opening will cause duplicate Sysmon event 1 with different CommandLine but at exactly the same time:
136861-image.png

Every process creation after wsl1 enabled will cause duplicate Sysmon event 1. The only difference between duplicate events in a single process creation is the CommandLine field, which looks random or meaningless.

Does anyone have any ideas?
Thank you.

Sysinternals
Sysinternals
Advanced system utilities to manage, troubleshoot, and diagnose Windows and Linux systems and applications.
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