alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TDTESS Backdoor User-Agent"; flow:established,to_server; http.user_agent; content:"XXXXXXXXXXXXXXXXX/5.0 (Windows NT 6.1 WOW64|3b 20|Trident/7.0|3b 20|AS|3b 20|rv:11.0) like Gecko"; reference:md5,113ca319e85778b62145019359380a08; reference:url,www.clearskysec.com/wp-content/uploads/2017/07/Operation_Wilted_Tulip.pdf; classtype:trojan-activity; sid:2024498; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_07_25, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_08_11;)