Zeroend.hotzone18.com-release ((top))
zeroend.hotzone18.com-release is a lightweight info-stealer with live shellcode delivery. The C2 domain is now sinkholed. The flag for the CTF was ZEROENDx0r_th3m_4ll (found after fixing the key offset in unpacked version).
It looks like the string you provided — content looking at zeroend.hotzone18.com-release — is likely part of a log entry, a debug output, or a browser console message. zeroend.hotzone18.com-release