ET MALWARE Linux DarkRadiation Ransomware Activity (curl)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Linux DarkRadiation Ransomware Activity (curl)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/api.php?apirequests="; startswith; fast_pattern;
    http.user_agent;
    content:"curl/"; startswith;
    http.host;
    pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/";
    reference:url,www.trendmicro.com/en_us/research/21/f/bash-ransomware-darkradiation-targets-red-hat--and-debian-based-linux-distributions.html;
    classtype:trojan-activity;
    sid:2033160; rev:1;
    metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2021_06_22, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_22, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)