ET MALWARE APT/Bitter Related Checkin Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/userlog.php?id="; fast_pattern;
content:"&&user="; distance:0;
content:"&&OsI="; distance:0;
http.header_names;
content:!"User-Agent";
content:!"Referer";
Raw source ET MALWARE APT/Bitter Related Checkin Activity (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 APT/Bitter Related Checkin Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/userlog.php?id="; fast_pattern;
    content:"&&user="; distance:0;
    content:"&&OsI="; distance:0;
    http.header_names;
    content:!"User-Agent";
    content:!"Referer";
    reference:md5,cc7ddf9ed230ad4e060dfd0f32389efb;
    reference:url,twitter.com/ShadowChasing1/status/1478259210110775297;
    classtype:command-and-control;
    sid:2034876; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_01_10, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_10;
)

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