ET MALWARE Storm-2603 AK47C2 HTTP Backdoor CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Storm-2603 AK47C2 HTTP Backdoor CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:1;
    content:"/";
    http.header_names; bsize:48;
    content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a|Content-Type|0d 0a|Accept|0d 0a 0d 0a|";
    http.request_body;
    content:"|2d 6a 21 29 24 6a 6c|"; fast_pattern; startswith;
    reference:url,research.checkpoint.com/2025/before-toolshell-exploring-storm-2603s-previous-ransomware-operations/;
    classtype:trojan-activity;
    sid:2063872; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, 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;
    target:src_ip;
)