alert dns $HOME_NET any -> any any (msg:"ET MALWARE Win32/Bisonal DNS Lookup 3"; dns.query; content:"kted56erhg.dynssl.com"; nocase; endswith; reference:md5,CC71620DE7216B186DA2C9BA06703613; reference:url,researchcenter.paloaltonetworks.com/2018/07/unit42-bisonal-malware-used-attacks-russia-south-korea/; classtype:trojan-activity; sid:2025926; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_07_31, deployment Perimeter, malware_family Bisonal, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16;)