Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Nimbus Manticore Minibrowse Data Exfiltration Attempt"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/hospital/"; startswith; fast_pattern; pcre:"/^\d{9,}\x2f\d{7,}/R"; content:"|3f|q"; http.content_type; content:"multipart/form-data"; http.request_body; content:"filename|3d 22|"; pcre:"/^(?:chrome|edge)Log\x2etxt/R"; reference:url,research.checkpoint.com/2025/nimbus-manticore-deploys-new-malware-targeting-europe/; classtype:trojan-activity; sid:2064968; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_09_29, deployment Perimeter, malware_family Stealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, tag Nimbus_Manticore, updated_at 2025_09_29, mitre_tactic_id TA0009, mitre_tactic_name Collection, mitre_technique_id T1005, mitre_technique_name Data_from_local_system; target:src_ip;)