ET MALWARE Echelon/Mist Stealer CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?alias="; fast_pattern;
content:"&data="; distance:0;
http.header_names;
content:"|0d 0a|Host|0d 0a|"; depth:8;
pcre:"/^(Connection\x0d\x0a)?\x0d\x0a$/R";
content:!"User-Agent";
content:!"Referer";
content:!"Accept";
Raw source ET MALWARE Echelon/Mist Stealer CnC Activity · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Echelon/Mist Stealer CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?alias="; fast_pattern;
    content:"&data="; distance:0;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|"; depth:8;
    pcre:"/^(Connection\x0d\x0a)?\x0d\x0a$/R";
    content:!"User-Agent";
    content:!"Referer";
    content:!"Accept";
    reference:md5,5c7638d8247e6da38835daa8a63a0a60;
    classtype:trojan-activity;
    sid:2030316; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_06_11, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_06_11;
)

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