ET MALWARE PureCrypter Requesting Injector M1

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:"/dl/"; fast_pattern;
pcre:"/^\d{4}\/\w{2,8}_\w{8}\.bmp/R";
content:".bmp"; endswith;
Raw source ET MALWARE PureCrypter Requesting Injector M1 · 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 PureCrypter Requesting Injector M1";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:"/dl/"; fast_pattern;
    pcre:"/^\d{4}\/\w{2,8}_\w{8}\.bmp/R";
    content:".bmp"; endswith;
    reference:url,blog.netlab.360.com/purecrypter/;
    classtype:command-and-control;
    sid:2038689; rev:1;
    metadata:created_at 2022_08_31, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_31;
)

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