sequence by winlog.computer_name, source.ip with maxspan=5s

/* Filter for an event that indicates coercion against known abused named pipes using an account that is not the host */
[file where host.os.type == "windows" and event.code : "5145" and 
    not startswith~(winlog.computer_name, substring(user.name, 0, -1)) and
    file.name : (
        "Spoolss", "netdfs", "lsarpc", "lsass", "netlogon", "samr", "efsrpc", "FssagentRpc",
        "eventlog", "winreg", "srvsvc", "dnsserver", "dhcpserver", "WinsPipe"
    )]

/* Detects a logon attempt using the Kerberos protocol resulting from the coercion coming from the same IP address */
[authentication where host.os.type == "windows" and event.code in ("4624", "4625") and
    endswith~(user.name, "$") and winlog.logon.type : "network" and
    winlog.event_data.AuthenticationPackageName : "Kerberos" and

    /* Filter for a machine account that matches the hostname */
    startswith~(winlog.computer_name, substring(user.name, 0, -1)) and

    /* Verify if the Source IP belongs to the host */
    not endswith(string(source.ip), string(host.ip)) and
    source.ip != null and source.ip != "::1" and source.ip != "127.0.0.1"]