BED-5152: Fix to filter out domains that are "."

Author: ktstrader

src/CommonLib/Processors/ComputerSessionProcessor.cs

@@ -121,6 +121,11 @@ await SendComputerStatus(new CSVComputerStatus {
                     username.Equals("anonymous logon", StringComparison.CurrentCultureIgnoreCase)) {
                     continue;
                 }
+                
+                //Filter out domains that are "."
+                if (computerDomain.Equals(".")) {
+                    continue;
+                }
 
                 // Remove leading slashes for unc paths
                 computerSessionName = computerSessionName.TrimStart('\\');
@@ -239,6 +244,11 @@ await SendComputerStatus(new CSVComputerStatus {
                 if (string.IsNullOrWhiteSpace(username) || username.EndsWith("$", StringComparison.Ordinal)) {
                     continue;
                 }
+                
+                //Filter out domains that are "."
+                if (domain.Equals(".")) {
+                    continue;
+                }
 
                 if (await _utils.ResolveAccountName(username, domain) is (true, var res)) {
                     results.Add(res);

test/unit/ComputerSessionProcessorTest.cs

@@ -49,6 +49,21 @@ public async Task ComputerSessionProcessor_ReadUserSessions_FilteringWorks() {
             Assert.True(result.Collected);
             Assert.Empty(result.Results);
         }
+        
+        [Fact]
+        public async Task ComputerSessionProcessor_ReadUserSessions_FilteringDomainWorks() {
+            var mockNativeMethods = new Mock<NativeMethods>();
+
+            var apiResult = new NetSessionEnumResults[] {
+                new("temp", "\\\\192.168.92.110")
+            };
+            mockNativeMethods.Setup(x => x.NetSessionEnum(It.IsAny<string>())).Returns(apiResult);
+
+            var processor = new ComputerSessionProcessor(new MockLdapUtils(), mockNativeMethods.Object,null, "dfm");
+            var result = await processor.ReadUserSessions("win10", _computerSid, ".");
+            Assert.True(result.Collected);
+            Assert.Empty(result.Results);
+        }
 
         [Fact]
         public async Task ComputerSessionProcessor_ReadUserSessions_ResolvesHost() {
@@ -178,7 +193,8 @@ public async Task ComputerSessionProcessor_ReadUserSessionsPrivileged_FilteringW
                 new("WIN10$", "TESTLAB"),
                 new("JOHN", "WIN10"),
                 new("SYSTEM", "NT AUTHORITY"),
-                new("ABC", "TESTLAB")
+                new("ABC", "TESTLAB"),
+                new("XYZ", ".")
             };
             mockNativeMethods.Setup(x => x.NetWkstaUserEnum(It.IsAny<string>())).Returns(apiResults);