ET HUNTING Suspicious Zipped Filename in Outbound POST Request (screenshot.) 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:"screenshot."; distance:26; within:300; nocase; fast_pattern;
pcre:"/^(?:(?:jp|pn)g|bmp)/Ri";
Raw source ET HUNTING Suspicious Zipped Filename in Outbound POST Request (screenshot.) 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 (screenshot.) 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:"screenshot."; distance:26; within:300; nocase; fast_pattern;
    pcre:"/^(?:(?:jp|pn)g|bmp)/Ri";
    classtype:trojan-activity;
    sid:2027108; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_03_20, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Stealer, updated_at 2020_11_18;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.