alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ZeroLocker Activity"; flow:established,to_server; http.uri; content:"/zImprimer/"; fast_pattern; pcre:"/\/zImprimer\/\d+-/"; http.header_names; content:!"Referer|0d 0a|"; content:!"Accept"; reference:url,securelist.com/blog/incidents/66135/zerolocker-wont-come-to-your-rescue/; reference:url,webroot.com/blog/2014/08/14/zero-locker/; reference:url,symantec.com/security_response/writeup.jsp?docid=2014-081521-4509-9; classtype:trojan-activity; sid:2018961; rev:4; metadata:created_at 2014_08_19, signature_severity Major, updated_at 2020_09_25;)