alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ELF/Mayhem Checkin"; flow:established,to_server; http.method; content:"POST"; nocase; http.header; content:"Pragma|3a 20|1337|0d 0a|"; fast_pattern; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Referer|0d 0a|"; reference:url,blog.malwaremustdie.org/2014/05/elf-shared-so-dynamic-library-malware.html; classtype:command-and-control; sid:2018456; rev:6; metadata:affected_product Linux, created_at 2014_05_08, malware_family ELF_Mayhem, signature_severity Major, updated_at 2024_04_07;)