ET HUNTING Suspicious POST With Reference to WINDOWS Folder Possible Malware Infection

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET HUNTING Suspicious POST With Reference to WINDOWS Folder Possible Malware Infection";
    flow:established,to_server;
    http.method;
    content:"POST"; nocase;
    http.host;
    content:!"nvidia.com"; endswith;
    content:!"dc.services.visualstudio.com"; endswith;
    content:!".avg.com"; endswith;
    content:!"bitdefender.net"; endswith;
    content:!"svc.iolo.com"; endswith;
    content:!".lavasoft.com"; endswith;
    content:!"canonicalizer.ucsuri.tcs";
    content:!"sentry.io"; endswith;
    http.user_agent;
    content:!"Elastic-winlogbeat"; startswith;
    http.request_body;
    content:"C|3a 5c 5c|WINDOWS|5c|"; fast_pattern; nocase;
    classtype:trojan-activity;
    sid:2011341; rev:19;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2010_09_28, deployment Perimeter, confidence Low, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_20;
)