ET MALWARE APT Operation Sidecopy lnk Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/font/js/images/"; startswith; fast_pattern;
content:"/css"; endswith;
http.header_names;
content:!"Referer";
content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|";
http.host;
content:".in"; endswith;
Raw source ET MALWARE APT Operation Sidecopy lnk Activity (GET) · Suricata
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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 APT Operation Sidecopy lnk Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/font/js/images/"; startswith; fast_pattern;
    content:"/css"; endswith;
    http.header_names;
    content:!"Referer";
    content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|";
    http.host;
    content:".in"; endswith;
    reference:url,twitter.com/ShadowChasing1/status/1406959698142666756;
    reference:md5,e05468aaa0c436e953116989ccf9703b;
    classtype:trojan-activity;
    sid:2033153; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_06_21, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_21;
)

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