alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Blacktech Plead CnC Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".aspx?m="; pcre:"/^[^&]+&[a-z]=[^&]+&[a-z]=[A-F0-9]+$/Rsi"; http.user_agent; bsize:41; content:"Mozilla/4.0 (compatible|3b 20|MSIE 8.0|3b 20|Win32)"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|accept"; content:!"|0d 0a|referer|0d 0a|"; reference:md5,2250fec29baf44d9d2c123ae037fce9c; reference:url,twitter.com/GlobalNTT_JP/status/1517061187107946496; classtype:trojan-activity; sid:2036308; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_04, deployment Perimeter, deprecation_reason Age, malware_family BlackTech, confidence High, signature_severity Major, updated_at 2024_04_30, reviewed_at 2024_03_05;)