ET MALWARE Win32/Delf.TJJ Variant CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/getcfg?id="; fast_pattern;
pcre:"/^\d$/R";
http.user_agent;
content:"Mozilla|2f|3|2e|0|20 28|compatible|3b 20|Indy|20|Library|29|"; bsize:38;
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
Raw source ET MALWARE Win32/Delf.TJJ Variant CnC Activity · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Delf.TJJ Variant CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/getcfg?id="; fast_pattern;
    pcre:"/^\d$/R";
    http.user_agent;
    content:"Mozilla|2f|3|2e|0|20 28|compatible|3b 20|Indy|20|Library|29|"; bsize:38;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    reference:md5,0751e43ec2a6ce78407b95b1d0326776;
    classtype:command-and-control;
    sid:2034900; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_01_12, deployment Perimeter, malware_family Win32_Delf_TJJ, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_12;
)

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