ET MALWARE MSIL/Bobik CnC Traffic

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php?key=";
http.user_agent;
content:"test-upload"; bsize:11; fast_pattern;
http.request_body;
content:"lang="; startswith;
content:"&image=iVBORw"; distance:0;
Raw source ET MALWARE MSIL/Bobik CnC Traffic · 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 MSIL/Bobik CnC Traffic";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php?key=";
    http.user_agent;
    content:"test-upload"; bsize:11; fast_pattern;
    http.request_body;
    content:"lang="; startswith;
    content:"&image=iVBORw"; distance:0;
    reference:md5,c110a5814451bbfba9eb41a2b2328213;
    classtype:command-and-control;
    sid:2034547; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_11_29, deployment Perimeter, malware_family MSIL_Bobik, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_29;
)

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