alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamarue/Andromeda Downloading Payload"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".exe"; endswith; pcre:"/^\/[a-z]+\/[a-z]+\.exe$/"; http.header; header_lowercase; content:"user-agent|3a 20|Mozilla|2f|4|2e|0|0d 0a|"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|accept"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,85d925a76909f29c3f370f35faedb9ea; classtype:trojan-activity; sid:2020683; rev:5; metadata:created_at 2015_03_12, signature_severity Major, updated_at 2024_04_28;)