ET MALWARE QuickResponseC2 Default Tasking Struct

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE QuickResponseC2 Default Tasking Struct";
    flow:established,to_server;
    xbits:set,ET.QuickResponseC2.Checkin,track ip_pair,expire 60;
    http.method;
    content:"GET";
    http.uri;
    content:"/command"; startswith; fast_pattern;
    pcre:"/^\d+/R";
    content:".png"; endswith;
    http.header;
    content:"Accept-Encoding|3a 20|gzip|2c 20|deflate|0d 0a|Accept|3a 20 2a 2f 2a 0d 0a|Connection|3a 20|keep-alive|0d 0a|";
    reference:url,github.com/kimd155/QuickResponseC2;
    classtype:trojan-activity;
    sid:2058173; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, affected_product Windows_11, attack_target Client_and_Server, tls_state plaintext, created_at 2024_12_10, deployment Perimeter, malware_family QuickResponseC2, performance_impact Low, confidence High, signature_severity Major, tag C2_Framework, updated_at 2024_12_10, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
    target:src_ip;
)