ET MALWARE Gamaredon MalDoc CnC Exfil

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php";
http.user_agent;
content:"Mozilla/"; startswith;
content:"|3a 3a|"; distance:0;
content:"|3a 3a 2f 2e|"; within:50; fast_pattern;
http.header_names;
content:!"Referer";
content:!"Cache-";
Raw source ET MALWARE Gamaredon MalDoc CnC Exfil · 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 Gamaredon MalDoc CnC Exfil";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php";
    http.user_agent;
    content:"Mozilla/"; startswith;
    content:"|3a 3a|"; distance:0;
    content:"|3a 3a 2f 2e|"; within:50; fast_pattern;
    http.header_names;
    content:!"Referer";
    content:!"Cache-";
    reference:md5,bbfef3fcb75449889e544601f7975b34;
    classtype:command-and-control;
    sid:2035024; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_04_19, deployment Perimeter, malware_family Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_19;
)

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