rule bulwark_https_bulwarkblack_com_hollowgraph_microsoft_365_calendar_c2_defense
{
    meta:
        author = "Bulwark Black LLC"
        source = "https://bulwarkblack.com/hollowgraph-microsoft-365-calendar-c2-defense/"
        description = "Auto-extracted indicators. Verify before use; not a behavioral detection rule."
        generated = "2026-08-27T00:00:00Z"
        tlp = "TLP:CLEAR"
        indicator_count = "1"
    strings:
        $s0 = "cloudlanecdn.com" ascii wide nocase  // Domains
    condition:
        any of ($s*)
}