ET MALWARE MASSLOGGER Client Data Exfil (POST)

Query · suricata

flow:established,to_server;
content:".zip|22 0d 0a|Content-Type: application/zip|0d 0a 0d 0a|PK";
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.content_type;
content:"multipart/form-data|3b| boundary=---------------------"; depth:51;
http.request_body;
content:"Content-Disposition|3a| form-data|3b| name=|22|file|22 3b 20|"; fast_pattern;
content:"Log.txt";
content:"PK";
Raw source ET MALWARE MASSLOGGER Client Data Exfil (POST) · 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 MASSLOGGER Client Data Exfil (POST)";
    flow:established,to_server;
    content:".zip|22 0d 0a|Content-Type: application/zip|0d 0a 0d 0a|PK";
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.content_type;
    content:"multipart/form-data|3b| boundary=---------------------"; depth:51;
    http.request_body;
    content:"Content-Disposition|3a| form-data|3b| name=|22|file|22 3b 20|"; fast_pattern;
    content:"Log.txt";
    content:"PK";
    reference:md5,8a1ba030a3bcfde60ad2e067fec8b773;
    classtype:trojan-activity;
    sid:2030154; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2020_05_11, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_23;
)

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