ET MALWARE Possible TA399/SideWinder Related Empty .rtf Inbound

Query · suricata

flow:established,to_client;
http.response_body; bsize:8;
content:"|7b 5c|rtf1|20 7d|"; fast_pattern;
http.content_len; bsize:1;
content:"8";
Raw source ET MALWARE Possible TA399/SideWinder Related Empty .rtf Inbound · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Possible TA399/SideWinder Related Empty .rtf Inbound";
    flow:established,to_client;
    http.response_body; bsize:8;
    content:"|7b 5c|rtf1|20 7d|"; fast_pattern;
    http.content_len; bsize:1;
    content:"8";
    reference:md5,43d35b5b20f491be219ab2eaa172ec55;
    classtype:trojan-activity;
    sid:2055129; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_08_08, deployment Perimeter, deployment SSLDecrypt, malware_family Sidewinder, confidence Medium, signature_severity Major, tag TA399, updated_at 2024_08_08;
)

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