alert dns $HOME_NET any -> any any (msg:"ET MALWARE Chafer CnC DNS Query"; dns.query; content:"win10-update.com"; nocase; endswith; reference:url,unit42.paloaltonetworks.com/new-python-based-payload-mechaflounder-used-by-chafer/; classtype:command-and-control; sid:2027054; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_03_06, deployment Perimeter, malware_family MechaFlounder, performance_impact Low, confidence High, signature_severity Major, tag APT, tag Chafer, tag Python, updated_at 2020_09_16;)