alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"🐾 - 🚨 Suspicious TLS Certificate - Possible 👿 Rhadamanthys InfoStealer 🪟 flow with C2 Server"; flow:to_client, stateless; tls.cert_issuer; content:"C=XX"; content:"ST=N/A"; content:"L=N/A"; content:"|4f 3d 53 65 6c 66 2d 73 69 67 6e 65 64 20 63 65 72 74 69 66 69 63 61 74 65|"; fast_pattern; content:"CN="; pcre:"/CN=[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}/"; content:"|3a 20 53 65 6c 66 2d 73 69 67 6e 65 64 20 63 65 72 74 69 66 69 63 61 74 65|"; distance:0; tls.cert_subject; content:"C=XX"; content:"ST=N/A"; content:"L=N/A"; content:"|4f 3d 53 65 6c 66 2d 73 69 67 6e 65 64 20 63 65 72 74 69 66 69 63 61 74 65|"; content:"CN="; pcre:"/CN=[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}/"; content:"|3a 20 53 65 6c 66 2d 73 69 67 6e 65 64 20 63 65 72 74 69 66 69 63 61 74 65|"; distance:0; reference:url,https://malpedia.caad.fkie.fraunhofer.de/details/win.rhadamanthys; reference:url,https://research.checkpoint.com/2023/from-hidden-bee-to-rhadamanthys-the-evolution-of-custom-executable-formats/; metadata:attack_target Client_and_Server, signature_severity Major, affected_product Windows_XP_Vista_7_8_10_11_Server_32_64_Bit, mitre_tactic_id TA0011, mitre_tactic_name Command_and_Control, mitre_technique_id T1071.001, mitre_technique_name Application_Layer_Protocol_Web_Protocols, created_at 2023_09_10, updated_at 2024_02_21; sid:3300692; rev:10; classtype:command-and-control;)