ET MALWARE Win32/Sarwent Variant CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/connect?hwid="; fast_pattern;
content:"&os="; distance:0;
content:"&bits="; distance:0;
content:"&av="; distance:0;
http.user_agent;
content:"Opera"; depth:5;
http.header_names;
content:"|0d 0a|Host|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Accept|0d 0a 0d 0a|"; depth:42;
isdataat:!1,relative;
Raw source ET MALWARE Win32/Sarwent Variant CnC Activity · 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 Win32/Sarwent Variant CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/connect?hwid="; fast_pattern;
    content:"&os="; distance:0;
    content:"&bits="; distance:0;
    content:"&av="; distance:0;
    http.user_agent;
    content:"Opera"; depth:5;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Accept|0d 0a 0d 0a|"; depth:42;
    isdataat:!1,relative;
    reference:md5,3ddc689e72faa473fa78df7302c708e8;
    classtype:command-and-control;
    sid:2029471; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_17, deployment Perimeter, malware_family Win32_Sarwent, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_17;
)

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