alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Agent.USB Variant CnC Activity"; flow:established,to_server; stream_size:server,<,5; content:"|2e d4 d6 19 57 d4 85 ba 0e 9d e5 56 fa 72 db af e5 17 e8 3e 3b 21 b7 26 fc 59 03 db d2 36 32 bb c3 c4 ab 7b 66 74 c4 68 ac 23 5b a3 fc e7 82 6a|"; offset:7; depth:48; reference:md5,c911d93b90bdef05be681a3b31c81679; reference:url,twitter.com/0xrb/status/1509396448387153920; classtype:trojan-activity; sid:2035752; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_05, deployment Perimeter, malware_family Win32_Agent_USB, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_05;)