alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"🐾 - 🚨 ValleyRAT 👿 contacting C2 🪟"; flow:to_server, stateless; flowbits:set,pptrls.valleyrat; flowbits:isnotset,pptrls.valleyrat; content:"|00 00 00|"; content:"|00 00 00 00 00 ca 00|"; distance:3; fast_pattern; dsize:<30; reference:url,https://malpedia.caad.fkie.fraunhofer.de/details/win.valley_rat; target:src_ip; metadata:attack_target Client_and_Server, signature_severity Major, affected_product Windows_XP_Vista_7_8_10_11_Server_32_64_Bit, mitre_tactic_id TA0011, mitre_tactic_name Command_and_Control, former_category MALWARE, malware_family ValleyRAT, created_at 2025_07_20, updated_at 2025_07_20; sid:3321454; rev:3; classtype:trojan-activity;)