ET MALWARE W32/Adrom.Backdoor CnC Beacon

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?page=";
content:"&enckey="; fast_pattern;
pcre:"/\x26enckey\x3D[A-F0-9]+$/";
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE W32/Adrom.Backdoor CnC Beacon · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32/Adrom.Backdoor CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?page=";
    content:"&enckey="; fast_pattern;
    pcre:"/\x26enckey\x3D[A-F0-9]+$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,c621055803c68e89f3cb141608fd0894;
    reference:md5,3c2be5202d2d68047c76bdf7e1dfc2be;
    classtype:command-and-control;
    sid:2020293; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_01_23, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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