alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/GenCBL.XS CnC Activity"; flow:established,to_server; content:"|30 32 bc|"; startswith; content:"|bc 4d 4a 56 3a 20|"; distance:0; content:"|20 31 20 2d 20 42 75 69 6c 64 20 3a 20|"; distance:0; fast_pattern; reference:md5,9dfd2f831b3672dc0c50b98550d3aa06; classtype:command-and-control; sid:2033819; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_27, deployment Perimeter, malware_family Win32_GenCBL_XS, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_27;)