The sensors on the guards uniforms gave away a security breach and Victor was already suited up by this time. Barreling down the hall he drew the Sonic Claymore slamming hard into the symbiote with a battle shout and a heavy metal shield like a battering ram. I'm right here. I've been looking for you, Eddie Brock. This saves me the trouble of hunting you down.
Using a sound discharge he would buy enough time for the building to be evacuated. Stark got the call that the building was under attack and his H4H comm informed Black Cat that it'd finally started. Venom had finally made his move.