ET MALWARE MalDoc Requesting Payload 2020-04-21

Query · suricata

flow:established,to_server;
http.method;
content:"HEAD";
http.uri;
content:".wbk?raw=true"; fast_pattern; endswith;
http.user_agent;
content:"Microsoft Office Existence Discovery"; bsize:36;
http.header_names;
content:!"Referer";
content:!"Accept";
content:!"Cache-";
content:!"Pragma";
Raw source ET MALWARE MalDoc Requesting Payload 2020-04-21 · 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 MalDoc Requesting Payload 2020-04-21";
    flow:established,to_server;
    http.method;
    content:"HEAD";
    http.uri;
    content:".wbk?raw=true"; fast_pattern; endswith;
    http.user_agent;
    content:"Microsoft Office Existence Discovery"; bsize:36;
    http.header_names;
    content:!"Referer";
    content:!"Accept";
    content:!"Cache-";
    content:!"Pragma";
    reference:md5,dffa1f38375e20e98c8ffaa752936e42;
    classtype:trojan-activity;
    sid:2029982; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_04_21, deployment Perimeter, malware_family Maldoc, confidence High, signature_severity Major, updated_at 2020_04_21;
)

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