ET MALWARE DangerousPassword APT Style Request (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
pcre:"/^\x2f(?:[A-Za-z0-9+\x2f]{4})*(?:[A-Za-z0-9+\x2f]{2}==|[A-Za-z0-9+\x2f]{3}=|[A-Za-z0-9+\x2f]{4})$/R";
content:"=.msi"; fast_pattern; endswith;
http.user_agent; bsize:17;
content:"Windows Installer";
http.header_names;
content:"|0d 0a|Connection|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith;
target:src_ip;
Raw source ET MALWARE DangerousPassword APT Style Request (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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE DangerousPassword APT Style Request (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/^\x2f(?:[A-Za-z0-9+\x2f]{4})*(?:[A-Za-z0-9+\x2f]{2}==|[A-Za-z0-9+\x2f]{3}=|[A-Za-z0-9+\x2f]{4})$/R";
    content:"=.msi"; fast_pattern; endswith;
    http.user_agent; bsize:17;
    content:"Windows Installer";
    http.header_names;
    content:"|0d 0a|Connection|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; startswith;
    reference:md5,42e5cebc15f181647e79bcc19784d08d;
    reference:url,twitter.com/h2jazi/status/1602314600753598465;
    classtype:trojan-activity;
    sid:2042655; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2022_12_12, deployment Perimeter, deployment SSLDecrypt, malware_family DangerousPassword, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_30;
    target:src_ip;
)

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