Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SMOKEDHAM/Thundershell CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri.raw; content:"//"; startswith; pcre:"/^[A-Za-z0-9]{1,15}\x2f$/R"; http.user_agent; content:"Microsoft Windows NT "; fast_pattern; startswith; http.content_type; bsize:16; content:"application/json"; http.request_body; content:"|7b 22|UUID|22 3a|null|2c 22|ID|22 3a 22|"; startswith; pcre:"/^[A-Za-z0-9]{16}/R"; content:"|22 2c 22|Data|22 3a 22|"; within:30; reference:url,medium.com/trac-labs/who-ordered-the-smokedham-backdoor-delicacies-in-the-wild-87f51e2e5bd2; classtype:trojan-activity; sid:2062332; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, tls_state TLSDecrypt, created_at 2025_05_14, deployment Perimeter, malware_family SMOKEDHAM, malware_family ThunderShell, performance_impact Low, confidence High, signature_severity Major, updated_at 2025_05_14, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel; target:src_ip;)