ET MALWARE DCRAT Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?";
content:"&";
pcre:"/^(?:[a-f0-9]{2}){16}=(?:[a-f0-9]{2}){16}&(?:[a-f0-9]{2}){16}=(?=[a-z0-9A-Z]{0,48}[A-Z][a-z][A-Z][a-z][A-Z])/R";
http.header_names;
content:"|0d 0a|Accept|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:56; fast_pattern;
Raw source ET MALWARE DCRAT Activity (GET) · 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 DCRAT Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?";
    content:"&";
    pcre:"/^(?:[a-f0-9]{2}){16}=(?:[a-f0-9]{2}){16}&(?:[a-f0-9]{2}){16}=(?=[a-z0-9A-Z]{0,48}[A-Z][a-z][A-Z][a-z][A-Z])/R";
    http.header_names;
    content:"|0d 0a|Accept|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:56; fast_pattern;
    reference:url,twitter.com/James_inthe_box/status/1448751827046985746;
    reference:md5,60cf8c1093d596a44dc997d00caae463;
    classtype:trojan-activity;
    sid:2034194; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2021_10_15, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_12;
)

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