We've got a notification from Trend Micro's security scanner on Windows Servers running the Instana Agent 2025.08.27.0718

- The executable was killed and quarantined by Trend Micro's scanner
- In the Instana Agent Logs, exceptions started to appear just afterwards:
2025-08-23T04:59:40.436+02:00 | ERROR | tana-global-scheduler-thread-4-1 | WindowsUtilImpl | com.instana.agent-process-handling - 1.0.26 | Exception while retrieving process metrics data from windows-service
java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.connect0(Native Method) ~[?:?]
at java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:101) ~[?:?]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412) ~[?:?]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255) ~[?:?]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237) ~[?:?]
at java.net.Socket.connect(Socket.java:615) ~[?:?]
at java.net.Socket.connect(Socket.java:563) ~[?:?]
at sun.net.NetworkClient.doConnect(NetworkClient.java:182) ~[?:?]
at sun.net.www.http.HttpClient.openServer(HttpClient.java:509) ~[?:?]
at sun.net.www.http.HttpClient.openServer(HttpClient.java:604) ~[?:?]
at sun.net.www.http.HttpClient.<init>(HttpClient.java:277) ~[?:?]
at sun.net.www.http.HttpClient.New(HttpClient.java:376) ~[?:?]
at sun.net.www.http.HttpClient.New(HttpClient.java:397) ~[?:?]
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1273) ~[?:?]
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1207) ~[?:?]
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1101) ~[?:?]
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1035) ~[?:?]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1634) ~[?:?]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1562) ~[?:?]
at com.instana.agent.process.handling.windows.DefaultWindowsServiceClient.executeRequest(DefaultWindowsServiceClient.java:68) ~[?:?]
at com.instana.agent.process.handling.windows.WindowsUtilImpl.getExtensionsServiceResponse(WindowsUtilImpl.java:381) ~[?:?]
at com.instana.agent.process.handling.windows.WindowsUtilImpl.getAllProcessMetrics(WindowsUtilImpl.java:273) ~[?:?]
at com.instana.agent.process.handling.windows.WindowsUtilImpl.lambda$createScheduledFutureToReadProcessMetrics$0(WindowsUtilImpl.java:122) ~[?:?]
at com.instana.agent.api.ObservableRunnable.run(ObservableRunnable.java:65) ~[?:?]
at com.instana.agent.util.ErrorLoggingRunnable.run(ErrorLoggingRunnable.java:33) ~[?:?]
at com.instana.agent.task.orchestrator.api.ExecutionPipeline.execute(ExecutionPipeline.java:247) ~[?:?]
at com.instana.agent.task.orchestrator.api.ExecutionPipeline.lambda$wrapWithErrorLogging$5(ExecutionPipeline.java:357) ~[?:?]
at com.instana.agent.util.ErrorLoggingRunnable.run(ErrorLoggingRunnable.java:33) ~[?:?]
at com.instana.agent.task.orchestrator.impl.ScheduledFutureCallbackTask.run(ScheduledFutureCallbackTask.java:66) ~[?:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[?:?]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) ~[?:?]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[?:?]
at com.instana.agent.task.orchestrator.impl.CallbackDecoratedRunnableScheduledFuture.run(CallbackDecoratedRunnableScheduledFuture.java:53) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[?:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
- The agent log in the backend UI there's INFO level output to be found:
2025-08-28T10:09:06.648+0200 | INFO | or-thread-23-929 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Checking the status
2025-08-28T10:09:06.648+0200 | INFO | or-thread-23-929 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Looking for LogCollector in : data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:09:06.648+0200 | INFO | or-thread-23-929 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - LogCollector Not Exists in path :data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:10:38.595+0200 | INFO | or-thread-23-926 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Checking the status
2025-08-28T10:10:38.611+0200 | INFO | or-thread-23-926 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Looking for LogCollector in : data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:10:38.611+0200 | INFO | or-thread-23-926 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - LogCollector Not Exists in path :data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:10:48.613+0200 | INFO | or-thread-23-916 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Checking the status
2025-08-28T10:10:48.613+0200 | INFO | or-thread-23-916 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Looking for LogCollector in : data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:10:48.613+0200 | INFO | or-thread-23-916 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - LogCollector Not Exists in path :data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:11:18.608+0200 | INFO | or-thread-23-916 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Checking the status
2025-08-28T10:11:18.624+0200 | INFO | or-thread-23-916 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Looking for LogCollector in : data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:11:18.624+0200 | INFO | or-thread-23-916 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - LogCollector Not Exists in path :data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:12:34.660+0200 | INFO | or-thread-23-929 | AgentLogBackendRequestHandler | 93 - com.instana.agent-sensor - 1.0.1 | | Forwarding log to backend for max 10 minutes.
2025-08-28T10:12:42.622+0200 | INFO | or-thread-23-923 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Checking the status
2025-08-28T10:12:42.622+0200 | INFO | or-thread-23-923 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - Looking for LogCollector in : data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:12:42.622+0200 | INFO | or-thread-23-923 | ClrLogsDownloadRequestHandler | 216 - com.instana.discovery-netcore - 1.0.71 | | CLR - Log Collector - LogCollector Not Exists in path :data\repo\com\instana\dotnet-logcollector-win-x64\1.302.1\dotnet-logcollector-win-x64-1.302.1\LogCollector.exe
2025-08-28T10:18:08.620+0200 | INFO | or-thread-23-931 | AgentLogBackendRequestHandler | 93 - com.instana.agent-sensor - 1.0.1 | | Forwarding log to backend stopped.
- Metrics of Processes do not seem to be affected
Anyone out there having seen the same behaviour?
Should the documentation may be have a note about running Trend Micro Apex One on Machines running the Instana Agent?
#Agent------------------------------
Philipp Pfaff
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