ET MALWARE Sharik/Smoke Loader Microsoft Connectivity Check

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/fwlink/?LinkId="; fast_pattern;
http.header;
content:!"SOAPAction|3a|";
http.user_agent;
content:!"MICROSOFT_DEVICE_METADATA_RETRIEVAL_CLIENT";
http.host;
content:"go.microsoft.com"; startswith;
http.header_names;
content:!"Referer|0d 0a|";
content:!"Accept";
Raw source ET MALWARE Sharik/Smoke Loader Microsoft Connectivity Check · 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 Sharik/Smoke Loader Microsoft Connectivity Check";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/fwlink/?LinkId="; fast_pattern;
    http.header;
    content:!"SOAPAction|3a|";
    http.user_agent;
    content:!"MICROSOFT_DEVICE_METADATA_RETRIEVAL_CLIENT";
    http.host;
    content:"go.microsoft.com"; startswith;
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"Accept";
    reference:md5,467b786f7c645c73d5c29347d35cae11;
    classtype:trojan-activity;
    sid:2022124; rev:8;
    metadata:created_at 2015_11_20, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_07;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.