alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE [ANY.RUN] RCRU64 Ransomware Variant CnC Activity"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:>1000; content:"_And_Netword_Drive_Size|3a|"; fast_pattern; content:"_Encryption_Mode"; distance:0; http.header_names; content:!"|0d 0a|User-Agent|0d 0a|"; nocase; reference:md5,40e009fe8fa1905ba8cfa93fcafc2ced; reference:url,app.any.run/tasks/3015bf9d-13f1-4381-adff-a01fc8234531/; reference:url,twitter.com/Jane_0sint/status/1660916458447069184; classtype:command-and-control; sid:2045821; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_23, deployment Perimeter, malware_family RUCU64, performance_impact Low, confidence High, signature_severity Critical, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_23, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)