alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE PureRAT TLS Certificate Observed (PureRAT Agent)"; flow:established,to_client; tls.cert_issuer; content:"PureRAT Agent"; fast_pattern; reference:md5,e63bc44fbf3dd02c91262e309fb4d0eb; classtype:trojan-activity; sid:2070181; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSEncrypt, created_at 2026_07_02, deployment Perimeter, malware_family PureRAT, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2026_07_02; target:dest_ip;)