ET MALWARE Backdoor.Elise Style IP Check M2

Query · suricata

flow:established,to_server;
urilen:16;
http.uri;
content:"/myip?format=txt";
http.user_agent;
content:"User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Win32)"; startswith;
http.host;
content:"api.ipaddress.com"; fast_pattern;
http.header_names;
content:"|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|";
Raw source ET MALWARE Backdoor.Elise Style IP Check M2 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Backdoor.Elise Style IP Check M2";
    flow:established,to_server;
    urilen:16;
    http.uri;
    content:"/myip?format=txt";
    http.user_agent;
    content:"User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Win32)"; startswith;
    http.host;
    content:"api.ipaddress.com"; fast_pattern;
    http.header_names;
    content:"|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|";
    classtype:trojan-activity;
    sid:2030229; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_05_29, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;
)

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