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Disable AMSI content logging in release #26235

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Merged
iSazonov merged 1 commit into from
Dec 3, 2025
Merged

Disable AMSI content logging in release #26235

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10 changes: 10 additions & 0 deletions src/System.Management.Automation/engine/runtime/Operations/MiscOps.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3649,6 +3649,7 @@ internal static object[] GetSlice(IList list, int startIndex)

internal static class MemberInvocationLoggingOps
{
#if DEBUG
private static readonly Lazy<bool> DumpLogAMSIContent = new Lazy<bool>(
() => {
object result = Environment.GetEnvironmentVariable("__PSDumpAMSILogContent");
Expand All @@ -3659,6 +3660,7 @@ internal static class MemberInvocationLoggingOps
return false;
}
);
#endif

private static string ArgumentToString(object arg)
{
Expand Down Expand Up @@ -3713,33 +3715,41 @@ internal static void LogMemberInvocation(string targetName, string name, object[

string content = $"<{targetName}>.{name}({argsBuilder})";

#if DEBUG
if (DumpLogAMSIContent.Value)
{
Console.WriteLine("\n=== Amsi notification report content ===");
Console.WriteLine(content);
}
#endif

var success = AmsiUtils.ReportContent(
name: contentName,
content: content);

#if DEBUG
if (DumpLogAMSIContent.Value)
{
Console.WriteLine($"=== Amsi notification report success: {success} ===");
}
#endif
}
catch (PSSecurityException)
{
// ReportContent() will throw PSSecurityException if AMSI detects malware, which
// must be propagated.
throw;
}
#pragma warning disable CS0168 // variable declared but never used
catch (Exception ex)
#pragma warning restore CS0168
{
#if DEBUG
if (DumpLogAMSIContent.Value)
{
Console.WriteLine($"!!! Amsi notification report exception: {ex} !!!");
}
#endif
}
}
}
Expand Down
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