alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE WhiteSnake Stealer Telegram Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/bot"; startswith; content:"/sendMessage?chat_id="; distance:0; content:"|26|text|3d|"; distance:0; content:"Beacon"; distance:0; content:"OS|3a|"; distance:0; content:"Country|3a|"; distance:0; content:"Username|3a|"; distance:0; content:"Compname|3a|"; distance:0; content:"|26|reply|5f|markup|3d|"; distance:0; content:"Download|22 2c 22|url|22 3a|"; distance:0; fast_pattern; http.host; content:"api.telegram.org"; http.header_names; content:!"User-Agent"; nocase; reference:md5,fdb8081ac26d8de3f7582b2616bcf3e8; classtype:trojan-activity; sid:2045869; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_05_25, deployment Perimeter, deployment SSLDecrypt, malware_family Gurcu, malware_family WhiteSnake, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_25, reviewed_at 2025_01_06;)