ET MALWARE STRRAT Initial HTTP Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?lid="; fast_pattern;
content:"-"; distance:4; within:1;
content:"-"; distance:4; within:1;
pcre:"/\.php\?lid=[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}$/";
http.user_agent;
content:"Java/"; startswith;
http.header_names;
content:!"|0d 0a|Referer";
content:!"|0d 0a|Cache-";
content:!"|0d 0a|Pragma";
Raw source ET MALWARE STRRAT Initial HTTP 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE STRRAT Initial HTTP Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?lid="; fast_pattern;
    content:"-"; distance:4; within:1;
    content:"-"; distance:4; within:1;
    pcre:"/\.php\?lid=[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}$/";
    http.user_agent;
    content:"Java/"; startswith;
    http.header_names;
    content:!"|0d 0a|Referer";
    content:!"|0d 0a|Cache-";
    content:!"|0d 0a|Pragma";
    reference:md5,bef4a453c819a453c255569c368972ea;
    reference:url,gdatasoftware.com/blog/strrat-crimson;
    classtype:command-and-control;
    sid:2030359; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_06_19, deployment Perimeter, malware_family STRRAT, confidence High, signature_severity Major, updated_at 2024_03_10;
)

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