alert dns $HOME_NET any -> any any (msg:"ET MALWARE Thallium CnC Domain in DNS Lookup"; dns.query; content:"tksrpdl.atwebpages.com"; nocase; bsize:22; reference:url,twitter.com/cyberwar_15/status/1422692746909786112; classtype:domain-c2; sid:2033670; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_08_04, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_04;)