alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE FrameworkPOS CnC Server Reporting IP Address To Agent"; flow:established,to_client; file.data; bsize:<20; content:"=="; startswith; content:"=="; within:17; fast_pattern; endswith; pcre:"/^(?:={2})(?:(?:[0-9]{1,3}\.){3}[0-9]{1,3})(?:={2})$/"; reference:url,threatstream.com/blog/three-month-frameworkpos-malware-campaign-nabs-43000-credits-cards-from-point-of-sale-systems; reference:md5,591e820591e10500fe939d6bd50e6776; classtype:command-and-control; sid:2022552; rev:3; metadata:created_at 2016_02_22, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_15;)