ET EXPLOIT Solarwinds Serv-U Directory Traversal Attempt Inbound (CVE-2024-28995)

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Solarwinds Serv-U Directory Traversal Attempt Inbound (CVE-2024-28995)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/?InternalDir="; fast_pattern;
    pcre:"/^.{0,10}(?:\x2f|\x5c|%5[Cc]|%2[Ff])?(?:(?:\x2e|%2[Ee]){1,2}(?:\x2f|\x5c|%5[Cc]|%2[Ff]){1,}){2,}/R";
    content:"&InternalFile=";
    reference:url,www.labs.greynoise.io/grimoire/2024-06-solarwinds-serv-u/;
    reference:cve,2024-28995;
    classtype:attempted-admin;
    sid:2053801; rev:2;
    metadata:affected_product SolarWinds, created_at 2024_06_23, cve CVE_2024_28995, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_04, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)