alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Steam Stealer"; flow:to_server,established; http.method; content:"GET"; http.uri; content:"/uploads/images/201"; fast_pattern; pcre:"/\.png$/"; http.header_names; content:!"Referer|0d 0a|"; content:!"Accept"; content:!"User-Agent|0d 0a|"; reference:md5,5f50e810668942e8d694faeabab08260; reference:url,blog.0x3a.com/post/107195908164/analysis-of-steam-stealers-and-the-steam-stealer; classtype:trojan-activity; sid:2020095; rev:5; metadata:created_at 2015_01_06, signature_severity Major, updated_at 2020_09_29;)