alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BandarChor Ransomware Checkin"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"number="; startswith; content:"&id="; distance:0; content:"&pc="; distance:0; content:"&tail="; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,fba4af888ae0e838dd083d4cfebc8f39; reference:md5,d32b6c067e64c141b0c239d23ab1ffd1; reference:url,f-secure.com/weblog/archives/00002795.html; classtype:command-and-control; sid:2021685; rev:10; metadata:attack_target Client_Endpoint, created_at 2015_08_18, deployment Perimeter, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_01, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)