alert dns $HOME_NET any -> any any (msg:"ET MALWARE OSX Backdoor Quimitchin DNS Lookup"; dns.query; content:"eidk.hopto.org"; depth:14; nocase; endswith; fast_pattern; reference:url,blog.malwarebytes.com/threat-analysis/2017/01/new-mac-backdoor-using-antiquated-code/; reference:md5,e4744b9f927dc8048a19dca15590660c; classtype:trojan-activity; sid:2023763; rev:5; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, created_at 2017_01_24, deployment Perimeter, malware_family Quimitchin, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2020_09_17;)