ET MALWARE Databack CnC

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:".php?pn="; fast_pattern;
content:"&s="; distance:0;
content:"&x="; distance:0;
pcre:"/\.php\?pn=[^&]+&s=[0-9]+&x=0\.[0-9]{7}$/";
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Databack CnC · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Databack CnC";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:".php?pn="; fast_pattern;
    content:"&s="; distance:0;
    content:"&x="; distance:0;
    pcre:"/\.php\?pn=[^&]+&s=[0-9]+&x=0\.[0-9]{7}$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,dc7b0c078482b68c1ff89da3ac88949b;
    classtype:command-and-control;
    sid:2021189; rev:4;
    metadata:created_at 2015_06_05, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_22;
)

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