alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Oilrig Stealer CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".aspx?version="; fast_pattern; pcre:"/^[0-9]+lu[0-9]+d[0-9]+$/Ri"; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; reference:url,docs.google.com/document/u/1/d/e/2PACX-1vR2TWm68bLidO3e2X0wTCqs0609vo5RXB85f6VL_Zm79wtTK59xADKh6MG0G7hSBZi8cPOiQVWAIie0/pub; classtype:command-and-control; sid:2025182; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_01_04, deployment Perimeter, malware_family OilRig, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_20;)