alert dns $HOME_NET any -> any any (msg:"ET MALWARE APT/Bitter Related CnC Domain in DNS Lookup"; dns.query; content:"olmajhnservice.com"; nocase; bsize:18; reference:md5,be9bd8ed8a4c052be5cedb0266f50c0d; reference:url,twitter.com/ShadowChasing1/status/1439929215919411206; classtype:domain-c2; sid:2033986; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_09_20, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_20;)