alert dns $HOME_NET any -> any any (msg:"ET MALWARE Storm-2603 CnC Domain in DNS Lookup (microsfot .org)"; dns.query; dotprefix; content:".microsfot.org"; nocase; endswith; reference:url,research.checkpoint.com/2025/before-toolshell-exploring-storm-2603s-previous-ransomware-operations/; classtype:domain-c2; sid:2063867; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2025_08_01, deployment Perimeter, malware_family AK47C2, performance_impact Low, confidence High, signature_severity Major, tag storm_2603, updated_at 2025_08_01, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)