ET RETIRED BlueShtorm Infostealer Data Exfiltration

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED BlueShtorm Infostealer Data Exfiltration";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/upload.php"; endswith;
    http.header_names;
    content:"|0d 0a|Content-Type|0d 0a|Host|0d 0a|Content-Length|0d 0a|Expect|0d 0a|Connection|0d 0a 0d 0a|"; bsize:60;
    http.request_body;
    content:"filename|3d 22|Log.zip|22 0d 0a|"; fast_pattern;
    content:"PK|03 04|"; distance:0;
    byte_test:1,<=,20,0,relative;
    content:"System Info.txt"; distance:0;
    reference:md5,1b02c34f6a49e9ba0c9b9a834a052c13;
    reference:url,twitter.com/3xp0rtblog/status/1526603444898959362;
    classtype:trojan-activity;
    sid:2036610; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2022_05_17, deployment Perimeter, former_category MALWARE, malware_family BlueShtorm_Stealer, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_12, reviewed_at 2024_09_12;
)