Crowdstrike detection of malicious activity of Amazon SSM Agent for Windows

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I think a more secure SSM Agent for Windows needs to be developed. Is there anything along these lines in the works?

I installed the valid, digitally signed AmazonSSMAgentSetup on a Windows server in preparation to present AWS as a potential alternative to our current on-prem logging solution. When opening up the Event Logs, Processes, or Performance info for this node in Fleet Manager, I get a Crowdstrike detection on the SessionManagerShell (winpty-agent.exe). This component of the SSM agent is unsigned and it is performing actions which are not acceptable in a secure Windows environment. This process downloads and executes a compressed, base64-encoded payload instead of using proper, code-signed powershell script. It collects the log files successfully at first, but it also puts powershell into bypass and runs a series of "wevtutil cl" commands that clear various Windows Event, Powershell, and trace logs which I prefer to retain. It's barbaric. At that point, Crowdstrike (rightfully) blocks the process and it does not continue to function.

1 Antwort
1
Akzeptierte Antwort

I recommend submitting the concern through the security vulnerability reporting form. Please see the Vulnerability Reporting page for more details.

AWS
Taka_M
beantwortet vor 2 Jahren

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