ET MALWARE Nim Based Downloader Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/version"; endswith;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; bsize:57;
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Save-Data|0d 0a|Host|0d 0a 0d 0a|"; endswith;
http.header;
content:"Save-Data|3a 20|"; fast_pattern;
Raw source ET MALWARE Nim Based Downloader Activity (GET) · 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 Nim Based Downloader Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/version"; endswith;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; bsize:57;
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Save-Data|0d 0a|Host|0d 0a 0d 0a|"; endswith;
    http.header;
    content:"Save-Data|3a 20|"; fast_pattern;
    reference:url,twitter.com/h2jazi/status/1531312666987347968;
    reference:md5,bf80b998a00cbb3705e23c3314498d61;
    classtype:trojan-activity;
    sid:2036733; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_05_31, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_31;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.