ET MALWARE W32/Echmark/MarkiRAT CnC Request

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/echo.php?req="; fast_pattern;
content:"&u="; distance:0;
content:"_"; distance:0;
http.user_agent;
content:"Microsoft WinHttp"; depth:17; endswith;
Raw source ET MALWARE W32/Echmark/MarkiRAT CnC Request · 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 W32/Echmark/MarkiRAT CnC Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/echo.php?req="; fast_pattern;
    content:"&u="; distance:0;
    content:"_"; distance:0;
    http.user_agent;
    content:"Microsoft WinHttp"; depth:17; endswith;
    reference:md5,d22d9ce61e6aea72aa9a8a233530db43;
    reference:url,securelist.com/ferocious-kitten-6-years-of-covert-surveillance-in-iran/102806/;
    classtype:trojan-activity;
    sid:2033401; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_06, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_06;
)

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