ET WEB_SPECIFIC_APPS MOVEit File Transfer - Set Session Variables - Guest Account Creation - CVE-2023-34362 Stage 1a

alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET WEB_SPECIFIC_APPS MOVEit File Transfer - Set Session Variables - Guest Account Creation - CVE-2023-34362 Stage 1a";
    flow:established,to_server;
    http.uri;
    content:"/moveitisapi/moveitisapi.dll?action=m2"; fast_pattern;
    http.header;
    content:"X-siLock-Transaction|3a 20|"; nocase;
    content:"folder_add_by_path"; within:18;
    content:"X-siLock-Transaction|3a 20|"; nocase;
    content:"session_setvars"; within:15;
    content:"X-siLock-SessVar"; nocase;
    content:"MyUsername|3a 20|Guest"; within:25;
    http.header_names;
    content:"|0d 0a|X-siLock-SessVar"; nocase;
    reference:url,www.horizon3.ai/moveit-transfer-cve-2023-34362-deep-dive-and-indicators-of-compromise/;
    reference:url,attackerkb.com/topics/mXmV0YpC3W/cve-2023-34362/rapid7-analysis;
    reference:cve,2023-34362;
    classtype:attempted-admin;
    sid:2046188; rev:1;
    metadata:attack_target Web_Server, created_at 2023_06_12, cve CVE_2023_34362, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag CISA_KEV, updated_at 2023_06_13;
    target:dest_ip;
)