alert dns $HOME_NET any -> any any (msg:"ET MALWARE Gift Cardshark CnC Domain in DNS Lookup"; dns.query; content:"wu-signon.com"; nocase; endswith; reference:url,www.riskiq.com/blog/external-threat-management/giftcard-sharks/; classtype:command-and-control; sid:2027616; rev:5; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2019_06_27, deployment Perimeter, confidence High, signature_severity Major, updated_at 2023_03_13;)