ET HUNTING Suspicious Zipped Filename in Outbound POST Request (google_chrome_default_) M2

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"Content-Disposition|3a 20|form-data|3b 20|name=";
content:".zip|22 0d 0a|"; within:150;
content:"|0d 0a|PK"; distance:0;
content:"google_chrome_default_"; distance:26; within:100; nocase; fast_pattern;
pcre:"/^(?:logins|c(?:cdata|ookie))/Ri";
Raw source ET HUNTING Suspicious Zipped Filename in Outbound POST Request (google_chrome_default_) M2 · 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 HUNTING Suspicious Zipped Filename in Outbound POST Request (google_chrome_default_) M2";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name=";
    content:".zip|22 0d 0a|"; within:150;
    content:"|0d 0a|PK"; distance:0;
    content:"google_chrome_default_"; distance:26; within:100; nocase; fast_pattern;
    pcre:"/^(?:logins|c(?:cdata|ookie))/Ri";
    classtype:trojan-activity;
    sid:2027277; rev:3;
    metadata:attack_target Client_and_Server, created_at 2019_04_24, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag T1002, tag data_compressed, updated_at 2020_11_18;
)

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