ET ADWARE_PUP Win32/Adware.Adposhel.A Checkin 3

Query · suricata

flow:established,to_server;
http.method;
content:"HEAD";
http.uri;
content:"/u/?"; depth:4; fast_pattern;
content:"&c="; distance:0;
content:"&r="; distance:0;
pcre:"/^\/u\/\?[a-z]=[a-zA-Z0-9_-]+&c=[a-zA-Z0-9_-]+&r=[0-9]{17,}$/";
Raw source ET ADWARE_PUP Win32/Adware.Adposhel.A Checkin 3 · 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 -> $EXTERNAL_NET any (
    msg:"ET ADWARE_PUP Win32/Adware.Adposhel.A Checkin 3";
    flow:established,to_server;
    http.method;
    content:"HEAD";
    http.uri;
    content:"/u/?"; depth:4; fast_pattern;
    content:"&c="; distance:0;
    content:"&r="; distance:0;
    pcre:"/^\/u\/\?[a-z]=[a-zA-Z0-9_-]+&c=[a-zA-Z0-9_-]+&r=[0-9]{17,}$/";
    reference:url,blog.malwarebytes.org/cybercrime/2016/01/trojan-dnschanger-circumvents-powershell-restrictions/;
    classtype:pup-activity;
    sid:2022722; rev:4;
    metadata:created_at 2016_04_11, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_31;
)

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