alert dns $HOME_NET any -> any any (msg:"ET MALWARE Downeks/Quasar DNS Lookup (ping .topsite .life)"; dns.query; content:"ping.topsite.life"; fast_pattern; nocase; bsize:17; reference:url,securelist.com/gaza-cybergang-updated-2017-activity/82765/; classtype:trojan-activity; sid:2024938; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_10_31, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_13;)