diff --git a/data/attackcon.json b/data/attackcon.json
index e09d4a7e4e5..e3543e348a9 100644
--- a/data/attackcon.json
+++ b/data/attackcon.json
@@ -2,12 +2,13 @@
   {
     "date": "October 2026",
     "title": "ATT&CKcon 7.0",
-    "description": "ATT&CKcon 7.0 is scheduled for October 27-28, 2026. Join the MITRE ATT&CK community in McLean or virtually for the next annual conference led by the MITRE ATT&CK team. More details will be shared on the event site as they become available.",
+    "description": "ATT&CKcon 7.0 is scheduled for October 27-28, 2026. Join the MITRE ATT&CK community in McLean or virtually for the next annual conference led by the MITRE ATT&CK team. Virtual registration is now open.",
     "banner_img": "/theme/images/attackcon/attackcon-7.0/attackcon7-logo.png",
     "banner_img_max_width": "32rem",
     "event_dates": "October 27-28, 2026",
     "event_location": "McLean, VA and virtual",
     "event_link": "https://na.eventscloud.com/mitreattack7/",
+    "virtual_registration_link": "https://mitre.brandlive.com/MITRE-ATTACKcon-7-0",
     "cfp_link": "https://www.openconf.org/ATTACKcon2026/openconf.php",
     "cfp_deadline_et": "2026-07-02T20:00:00-04:00"
   },
diff --git a/modules/resources/templates/attackcon-overview.html b/modules/resources/templates/attackcon-overview.html
index bd5e5339e98..101afd06d4b 100644
--- a/modules/resources/templates/attackcon-overview.html
+++ b/modules/resources/templates/attackcon-overview.html
@@ -55,6 +55,18 @@ <h2 class="h4"><strong>{{ con.title }} Event Details</strong></h2>
           </button>
         </a>
         {% endif %}
+        {% if "virtual_registration_link" in con %}
+        <a class="my-2 ml-2" target="_blank" rel="noopener" href="{{ con.virtual_registration_link }}">
+          <button type="button" class="slide-button slide-button-secondary">
+            <span class="slide-button-text">
+              <span>Register Virtually</span>
+            </span>
+            <span class="slide-button-icon">
+              <i class="fa fa-external-link"></i>
+            </span>
+          </button>
+        </a>
+        {% endif %}
         {% if con.show_cfp %}
         <a class="my-2 ml-2" target="_blank" rel="noopener" href="{{ con.cfp_link }}">
           <button type="button" class="slide-button slide-button-secondary">
diff --git a/modules/stixtests/stixtests.py b/modules/stixtests/stixtests.py
index 824148a4a7d..849319e3e1b 100644
--- a/modules/stixtests/stixtests.py
+++ b/modules/stixtests/stixtests.py
@@ -16,6 +16,7 @@ def run_tests():
     """Run tests"""
     error_list = []
     tests = 0
+    invalid_stix_domains = []
 
     logger.info("Removing old reports")
     reports = [stixtests_config.linkbyids_report_filename]
@@ -39,11 +40,14 @@ def run_tests():
         stix_filename = util.stixhelpers.get_stix_file_path(domain["name"])
 
         logger.info(f"Validating STIX for domain: {domain['name']}")
+        tests += 1
         results = stix2validator.validate_file(fn=str(stix_filename), options=options)
         if results.is_valid:
             logger.info(f"File {stix_filename} is valid")
         else:
             logger.error(f"File {stix_filename} is invalid:")
+            error_list.append(stixtests_config.INVALID_STIX_BUNDLE)
+            invalid_stix_domains.append(domain["name"])
 
             stix2validator.print_results(results)
 
@@ -77,6 +81,8 @@ def run_tests():
                 error_count=broken_linkbyids_count,
                 error_type="Broken LinkByIds",
             )
+        if invalid_stix_domains:
+            logger.error(f"STIX validation failed for: {', '.join(invalid_stix_domains)}")
 
     if not site_config.args.override_exit_status:
         handle_exit(error_list)
@@ -193,5 +199,5 @@ def handle_exit(exit_codes):
         # Exit on failure if any of these exit codes are found
         # Regarding the link checker, only exit on failure if a problem
         # is found on an internal link
-        if stixtests_config.BROKEN_LINKBYID in exit_codes:
+        if stixtests_config.BROKEN_LINKBYID in exit_codes or stixtests_config.INVALID_STIX_BUNDLE in exit_codes:
             exit(stixtests_config.FAILURE)
diff --git a/modules/stixtests/stixtests_config.py b/modules/stixtests/stixtests_config.py
index 5634f11a566..36cf011739b 100644
--- a/modules/stixtests/stixtests_config.py
+++ b/modules/stixtests/stixtests_config.py
@@ -15,6 +15,7 @@
 FAILURE = 1
 WARNING = 2
 BROKEN_LINKBYID = -14
+INVALID_STIX_BUNDLE = -15
 
 # Used to reset text color
 RESET = "\033[0m"  # mode 0  = reset
diff --git a/modules/util/stixhelpers.py b/modules/util/stixhelpers.py
index befaf8a234a..b7c77fe588a 100644
--- a/modules/util/stixhelpers.py
+++ b/modules/util/stixhelpers.py
@@ -583,7 +583,13 @@ def download_stix_file(url, filepath):
 def get_url_from_stix(stix_object, is_subtechnique=False):
     """Parse the website url from a stix object."""
     if stix_object.get("external_references"):
-        url = stix_object["external_references"][0]["url"]
+        first_external_reference = stix_object["external_references"][0]
+        url = first_external_reference.get("url")
+        if not url:
+            attack_id = buildhelpers.get_attack_id(stix_object)
+            stix_id = stix_object["id"]
+            logger.warning(f"[{stix_id}] [{attack_id}] has no URL in its first external reference")
+            return None
         split_url = url.split("/")
         splitfrom = -3 if is_subtechnique else -2
         link = "/".join(split_url[splitfrom:])
diff --git a/requirements.txt b/requirements.txt
index 773a84c0813..9a001f9e3c7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ bleach==6.3.0
 colorama==0.4.6
 future==1.0.0
 loguru==0.7.3
-mitreattack-python==6.2.0
+mitreattack-python==6.2.1
 pelican==4.12.0
 pelican-sitemap==1.2.2
 python-dotenv==1.2.2
diff --git a/website-banner.production b/website-banner.production
index aa6b430e308..c63b47df24e 100644
--- a/website-banner.production
+++ b/website-banner.production
@@ -1 +1 @@
-ATT&CKcon 7.0 in-person tickets are open! Join us October 27-28, 2026 in McLean, VA. <a href="https://na.eventscloud.com/website/93925/">Register here</a> for in-person tickets; hotel and location details can be found in the <a href="https://na.eventscloud.com/website/93925/faq/">FAQ</a>.
\ No newline at end of file
+ATT&CKcon 7.0 registration is open! Join us October 27-28, 2026 in McLean, VA or virtually. <a href="https://na.eventscloud.com/website/93925/">Register in person</a> or <a href="https://mitre.brandlive.com/MITRE-ATTACKcon-7-0">register virtually</a>. See the <a href="https://na.eventscloud.com/website/93925/faq/">FAQ</a> for hotel and venue details.