ET MALWARE FIN7 JSSLoader Activity (GET)

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET /?id="; startswith; fast_pattern;
http.uri;
pcre:"/^\/\?id\=[A-Z]{12,28}[0-9]$/";
http.header_names;
content:"|0d 0a|Host|0d 0a 0d 0a|"; bsize:10;
Raw source ET MALWARE FIN7 JSSLoader Activity (GET) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE FIN7 JSSLoader Activity (GET)";
    flow:established,to_server;
    http.request_line;
    content:"GET /?id="; startswith; fast_pattern;
    http.uri;
    pcre:"/^\/\?id\=[A-Z]{12,28}[0-9]$/";
    http.header_names;
    content:"|0d 0a|Host|0d 0a 0d 0a|"; bsize:10;
    reference:md5,a5bad2da096e9ebbb90845dbadec91fe;
    reference:md5,253cb5361e43bfb1931fa115336e7c16;
    reference:md5,dd6d09e0e565ea18b85a18af8e95eb75;
    reference:url,blog.morphisec.com/new-jssloader-trojan-delivered-through-xll-files;
    classtype:trojan-activity;
    sid:2035608; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_03_25, deployment Perimeter, deployment SSLDecrypt, malware_family FIN7, malware_family CarbonSpider, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_25;
)

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.