alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Ragnarok Ransomware CnC Activity M2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"&prv_ip="; fast_pattern; content:".doc"; content:".xls"; content:".ppt"; content:".sql"; content:".pdf"; reference:url,twitter.com/malwrhunterteam/status/1256263426441125888; reference:md5,32ed52d918a138ddad24dd3a84e20e56; classtype:command-and-control; sid:2030117; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_05_06, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_05, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)