diff --git a/prowler/providers/aws/lib/arn/arn.py b/prowler/providers/aws/lib/arn/arn.py
index b2bdcabf..653715f0 100644
--- a/prowler/providers/aws/lib/arn/arn.py
+++ b/prowler/providers/aws/lib/arn/arn.py
@@ -47,5 +47,5 @@ def parse_iam_credentials_arn(arn: str) -> ARN:
 
 def is_valid_arn(arn: str) -> bool:
     """is_valid_arn returns True or False whether the given AWS ARN (Amazon Resource Name) is valid or not."""
-    regex = r"^arn:aws(-cn|-us-gov)?:[a-zA-Z0-9\-]+:([a-z]{2}-[a-z]+-\d{1})?:(\d{12})?:[a-zA-Z0-9\-_\/]+(:\d+)?$"
+    regex = r"^arn:aws(-cn|-us-gov|-iso|-iso-b)?:[a-zA-Z0-9\-]+:([a-z]{2}-[a-z]+-\d{1})?:(\d{12})?:[a-zA-Z0-9\-_\/:]+(:\d+)?$"
     return re.match(regex, arn) is not None
diff --git a/tests/providers/aws/lib/arn/arn_test.py b/tests/providers/aws/lib/arn/arn_test.py
index ebaaed09..eab5f30e 100644
--- a/tests/providers/aws/lib/arn/arn_test.py
+++ b/tests/providers/aws/lib/arn/arn_test.py
@@ -314,6 +314,11 @@ class Test_ARN_Parsing:
         assert is_valid_arn("arn:aws:iam::012345678910:user/test")
         assert is_valid_arn("arn:aws-cn:ec2:us-east-1:123456789012:vpc/vpc-12345678")
         assert is_valid_arn("arn:aws-us-gov:s3:::bucket")
+        assert is_valid_arn("arn:aws-iso:iam::012345678910:user/test")
+        assert is_valid_arn("arn:aws-iso-b:ec2:us-east-1:123456789012:vpc/vpc-12345678")
+        assert is_valid_arn(
+            "arn:aws:lambda:eu-west-1:123456789012:function:lambda-function"
+        )
         assert not is_valid_arn("arn:azure:::012345678910:user/test")
         assert not is_valid_arn("arn:aws:iam::account:user/test")
         assert not is_valid_arn("arn:aws:::012345678910:resource")