ET MALWARE SMTP Subject Line Contains C Path and EXE Possible Trojan Reporting Execution Path/Binary Name

Query · suricata

flow:established,to_server;
content:"Subject|3A 20|";
content:"C|3A 5C|"; nocase; fast_pattern; within:100;
content:".exe"; within:40;
pcre:"/Subject\x3A\x20[^\r\n]*C\x3A\x5C[^\r\n]*\x2Eexe/i";
Raw source ET MALWARE SMTP Subject Line Contains C Path and EXE Possible Trojan Reporting Execution Path/Binary Name · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET 25 (
    msg:"ET MALWARE SMTP Subject Line Contains C Path and EXE Possible Trojan Reporting Execution Path/Binary Name";
    flow:established,to_server;
    content:"Subject|3A 20|";
    content:"C|3A 5C|"; nocase; fast_pattern; within:100;
    content:".exe"; within:40;
    pcre:"/Subject\x3A\x20[^\r\n]*C\x3A\x5C[^\r\n]*\x2Eexe/i";
    reference:md5,24e937b9f3fd6a04dde46a2bc75d4b18;
    classtype:bad-unknown;
    sid:2014343; rev:2;
    metadata:created_at 2012_03_09, confidence Medium, signature_severity Major, updated_at 2019_07_26;
)

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