ET MALWARE Suspected TA399/SideWinder Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/files-"; offset:25;
content:"/data?d="; distance:0; fast_pattern;
http.header_names;
content:!"User-Agent";
content:!"Referer";
content:!"Accept";
Raw source ET MALWARE Suspected TA399/SideWinder 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 Suspected TA399/SideWinder Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/files-"; offset:25;
    content:"/data?d="; distance:0; fast_pattern;
    http.header_names;
    content:!"User-Agent";
    content:!"Referer";
    content:!"Accept";
    reference:md5,344b7370c6e61812eeb1cf1d737f27f3;
    reference:url,twitter.com/ShadowChasing1/status/1396809305194590211;
    classtype:trojan-activity;
    sid:2033032; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_05_25, deployment Perimeter, malware_family Sidewinder, performance_impact Low, confidence Medium, signature_severity Major, tag TA399, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_25;
)

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