alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE JS/Nemucod requesting EXE payload 2016-03-31";
flow:established,to_server;
flowbits:set,ET.nemucod.exerequest;
http.method;
content:"GET";
http.uri;
content:"/counter/?ad="; nocase;
content:"="; distance:0;
pcre:"/=\d+$/";
http.header_names;
content:!"Referer";
reference:url,certego.net/en/news/italian-spam-campaigns-using-js-nemucod-downloader/;
reference:md5,c5ad81d8d986c92f90d0462bc06ac9c6;
classtype:trojan-activity;
sid:2022692; rev:4;
metadata:created_at 2016_03_31, malware_family JS_Nemucod, signature_severity Major, updated_at 2020_08_17;
)