alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"MALWARE [PTsecurity] Ozone RAT connection"; flow:established, to_server; dsize:6; content:"|0000 00|"; fast_pattern; offset:2; depth:3; content:"|01|"; offset:0; depth:1; byte_test:1,>,0x10,1; byte_test:1,<,0xf0,1; stream_size:server, =, 1; stream_size:client, =, 7; classtype:trojan-activity; reference:url, github.com/ptresearch/AttackDetection; sid:11000431; rev:4;)