alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Sabsik.FL.B!ml CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.user_agent; content:"Go-http-client"; startswith; http.content_type; content:"application/x-www-form-urlencoded"; bsize:33; http.request_body; content:"|ef bc 9a|"; depth:40; content:"Memorytotal|ef bc 9a|"; fast_pattern; content:"|ef bc 9a 5b|System|20|Process|5d 20|"; distance:0; reference:md5,84fffb6b0ee44238261a21a0af066c12; classtype:command-and-control; sid:2034032; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_27, deployment Perimeter, malware_family Win32_Sabsik_FL_B_ml, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_27;)