alert tcp $HOME_NET any -> $EXTERNAL_NET 8080 (msg:"ET MALWARE Possible Chimera Ransomware - Bitmessage Activity"; flow:established,to_server; content:"version"; offset:4; depth:7; content:"Bitmessage|3a|"; distance:0; reference:md5,b66a864255ad796cf1e82f973f67f556; reference:url,reaqta.com/2015/11/diving-into-chimera-ransomware/; classtype:policy-violation; sid:2022075; rev:1; metadata:attack_target Client_Endpoint, created_at 2015_11_12, deployment Perimeter, confidence Medium, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)