ET MALWARE Win32/DCRat CnC Exfil

Query · suricata

flow:established,to_server;
urilen:>150;
http.method;
content:"POST";
http.uri;
content:".php?";
http.request_body;
content:"|0d 0a|Content-Type|3a 20|";
pcre:"/^[a-f0-9]{32}\r\n\r\nPK/Rsi";
content:"Browsers/"; fast_pattern; distance:0;
http.header_names;
content:!"Accept-";
content:!"Referer";
Raw source ET MALWARE Win32/DCRat CnC Exfil · Suricata
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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 Win32/DCRat CnC Exfil";
    flow:established,to_server;
    urilen:>150;
    http.method;
    content:"POST";
    http.uri;
    content:".php?";
    http.request_body;
    content:"|0d 0a|Content-Type|3a 20|";
    pcre:"/^[a-f0-9]{32}\r\n\r\nPK/Rsi";
    content:"Browsers/"; fast_pattern; distance:0;
    http.header_names;
    content:!"Accept-";
    content:!"Referer";
    reference:md5,3aa17643535d17db367447e1104e12d9;
    classtype:trojan-activity;
    sid:2033087; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_04, deployment Perimeter, malware_family DCRat, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_09;
)

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