alert tcp $HOME_NET any -> $EXTERNAL_NET 2021 (msg:"ET ADWARE_PUP Win32/Packed.FlyStudio.AA Checkin"; flow:established,to_server; content:"|5b bf cd bb a7 b6 cb 5d 0d 0a c3 fc c1 ee 3d c9 cf cf df cd a8 d6 aa 0d 0a cd e2 cd f8 49 50 3d|"; depth:40; fast_pattern; content:"|0d 0a bc c6 cb e3 bb fa c3 fb b3 c6 3d|"; content:"|0d 0a b2 d9 d7 f7 cf b5 cd b3 3d|"; content:"|0d 0a bb fa c6 f7 c2 eb 3d|"; threshold:type limit, track by_src, seconds 180, count 1; reference:md5,339ed706f35500780ab3417025e44b59; classtype:trojan-activity; sid:2044756; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_23, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_23;)