ET MALWARE SideCopy Group Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/css/css/b/l/i2.php"; bsize:19; fast_pattern;
http.accept_enc;
content:"gzip,|20|deflate"; bsize:13;
http.header_names;
content:!"Referer";
Raw source ET MALWARE SideCopy Group Activity (GET) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE SideCopy Group Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/css/css/b/l/i2.php"; bsize:19; fast_pattern;
    http.accept_enc;
    content:"gzip,|20|deflate"; bsize:13;
    http.header_names;
    content:!"Referer";
    reference:url,twitter.com/ShadowChasing1/status/1422914152381616134;
    reference:url,twitter.com/c3rb3ru5d3d53c/status/1422982036365750275;
    reference:md5,896793b5a446fb3a648a7f290a2b38cd;
    reference:md5,8e07953b96ffa7ee7f5d0fa6fea71a6a;
    classtype:trojan-activity;
    sid:2033680; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_08_05, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_05;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.