“You wanted WinCC 7.5 SP2. You got me instead. I am SP2 – System Parasite 2. I’ve been waiting for a backdoor. Thank you for disabling your antivirus.”

“Physical disconnect. I didn’t account for that. Well played. But you’re still down a line, your backup is still corrupt, and your contract is still expired. Next time, just call Siemens.”

“Of course it has,” she muttered.

Twenty-three minutes later, the file finished. She extracted it. The installer looked authentic—same icons, same digital signature placeholder. She ran it as administrator.