ET MALWARE Suspected APT37 Related Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/install.bak/"; startswith; fast_pattern;
pcre:"/\/[0-9]{2}\.html$/R";
http.user_agent;
content:"Mozilla/4.0"; startswith;
http.header_names;
content:!"Referer";
target:src_ip;
Raw source ET MALWARE Suspected APT37 Related 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspected APT37 Related Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/install.bak/"; startswith; fast_pattern;
    pcre:"/\/[0-9]{2}\.html$/R";
    http.user_agent;
    content:"Mozilla/4.0"; startswith;
    http.header_names;
    content:!"Referer";
    reference:md5,e89725778e52fa571a229cc6e65acd8d;
    reference:md5,9bf4576a1381c15c08060ca6cfd59949;
    reference:url,twitter.com/suyog41/status/1640662025247289345;
    classtype:trojan-activity;
    sid:2044834; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_03_30, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_30;
    target:src_ip;
)

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