The Brambul follow-up analysis describes Lazarus-linked worm behavior associated with the pre-WannaCry malware family, focusing on the second routine that creates and runs lsasvc.exe. The malware adds a WindowsUpdate Run registry value for persistence, attempts administrator access to shared folders as in the earlier routine, and creates Windows Genuine Logon Manager and Microsoft Windows Genuine Updater services. It collects host and OS information, uses SMB/IPC/SCM activity for self-copying and distribution to random IPs, and sends data over SMTP while spoofing the sender as [email protected] with [email protected] and gmail.com referenced in the code. The source frames Brambul as part of Lazarus/WannaCry lineage and highlights network propagation, service creation, registry persistence, and email-based reporting as defensive behaviors to monitor.