alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Ousaban Banker Server Response M2"; flow:established,to_client; stream_size:server,<,40; content:"#SocketMain#<#>"; startswith; pcre:"/^\d+$/R"; reference:md5,f2836216ca554dfdc8a300decb644911; reference:url,twitter.com/c3rb3ru5d3d53c/status/1452638349240455176; reference:url,twitter.com/James_inthe_box/status/1452631575976288261; classtype:command-and-control; sid:2034241; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_10_25, deployment Perimeter, malware_family Ousaban, confidence High, signature_severity Major, tag Banker, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_25;)