alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Telemiris CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/bot"; startswith; content:"/getUpdates|3f|offset|3d|"; distance:0; fast_pattern; http.host; content:"api.telegram.org"; http.user_agent; content:"WindowsPowerShell"; nocase; reference:url,securelist.com/tomiris-called-they-want-their-turla-malware-back/109552/; reference:md5,90f2ca0a38d6e5416ee2f6be6326521d; classtype:trojan-activity; sid:2058964; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, affected_product Windows_8, affected_product Windows_10, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_01_06, deployment Perimeter, deployment SSLDecrypt, malware_family Telemiris, performance_impact Low, confidence High, signature_severity Major, tag UNK_SmilingWanderer, updated_at 2025_01_06, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1573, mitre_technique_name Encrypted_Channel; target:src_ip;)