alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Enchanim C2 Client Check-in"; flow:established,to_server; content:"some_magic_code1"; depth:16; reference:md5,2642999a085443e9055b292c4d405e64; reference:md5,37066ed52cd7510bf04808c332599f1c; reference:url,www.seculert.com/blog/2013/04/magic-persistent-threat.html; classtype:command-and-control; sid:2016772; rev:2; metadata:created_at 2013_04_19, malware_family Win32_Enchanim, signature_severity Major, updated_at 2019_07_26;)