ET EXPLOIT_KIT Possible PurpleFox EK Redirect

Query · suricata

flow:established,to_client;
http.stat_code;
content:"302";
http.location;
content:"/?key="; fast_pattern;
pcre:"/^[A-F0-9]{16}$/R";
file.data;
content:"<body>";
content:"<a HREF=|22|http"; distance:0;
content:"/?key="; within:400;
pcre:"/^[A-F0-9]{16}\x22>/R";
content:!"<html>";
Raw source ET EXPLOIT_KIT Possible PurpleFox EK Redirect · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT_KIT Possible PurpleFox EK Redirect";
    flow:established,to_client;
    http.stat_code;
    content:"302";
    http.location;
    content:"/?key="; fast_pattern;
    pcre:"/^[A-F0-9]{16}$/R";
    file.data;
    content:"<body>";
    content:"<a HREF=|22|http"; distance:0;
    content:"/?key="; within:400;
    pcre:"/^[A-F0-9]{16}\x22>/R";
    content:!"<html>";
    reference:url,twitter.com/nao_sec/status/1343918070989877252;
    classtype:exploit-kit;
    sid:2031463; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_29, deployment Perimeter, confidence Medium, signature_severity Major, tag Exploit_Kit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_29;
)

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