ET RETIRED NoMercy Data Exfiltration M2

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED NoMercy Data Exfiltration M2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/b?sysinfoother"; fast_pattern; startswith;
    content:"uid=";
    content:"version=";
    http.header_names;
    content:!"User-Agent";
    content:!"Referer";
    reference:url,blog.cyble.com/2022/07/07/nomercy-stealer-adding-new-features;
    classtype:trojan-activity;
    sid:2037740; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_07_11, deployment Perimeter, former_category MALWARE, malware_family NoMercy_Stealer, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;
)