ET MALWARE Possible IndigoDrop/Cobalt Strike Download

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"XHhmY1x4ZThceDg5XHgwMFx4MDBceDAwXHg2MFx4ODlceGU1X"; depth:49; fast_pattern;
isdataat:!5000,relative;
Raw source ET MALWARE Possible IndigoDrop/Cobalt Strike Download · 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 IndigoDrop/Cobalt Strike Download";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"XHhmY1x4ZThceDg5XHgwMFx4MDBceDAwXHg2MFx4ODlceGU1X"; depth:49; fast_pattern;
    isdataat:!5000,relative;
    reference:url,blog.talosintelligence.com/2020/06/indigodrop-maldocs-cobalt-strike.html;
    classtype:trojan-activity;
    sid:2030400; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_06_26, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_26;
)

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.