ET MALWARE Unknown CN Related APT Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/update/v32/default"; startswith; fast_pattern;
http.header_names;
content:!"Referer";
http.user_agent;
content:"Mozilla/5.0 (Windows NT 6.3|3b 20|Trident/7.0|3b 20|rv|3a|11.0) like Gecko"; bsize:61;
Raw source ET MALWARE Unknown CN Related APT Activity (GET) · Suricata
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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 Unknown CN Related APT Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/update/v32/default"; startswith; fast_pattern;
    http.header_names;
    content:!"Referer";
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 6.3|3b 20|Trident/7.0|3b 20|rv|3a|11.0) like Gecko"; bsize:61;
    reference:url,twitter.com/h2jazi/status/1537536029250490382;
    reference:md5,8cdd56b2b4e1e901f7e728a984221d10;
    classtype:trojan-activity;
    sid:2037035; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_06_17, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_17;
)

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