alert tcp-pkt $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/I'm_Better Stealer CnC Command - get_key"; flow:established,to_client; dsize:7; content:"get_key"; fast_pattern; threshold:type limit, seconds 120, count 1, track by_src; reference:md5,e9df653567149f789852c2dab16f46bb; reference:url,www.bridewell.com/insights/news/detail/threat-advisory-bridewell-malware-impersonating-online-tools-and-video-games; classtype:trojan-activity; sid:2044535; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_08, deployment Perimeter, malware_family Win32_I_m_Better, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_08;)