ET MALWARE Observed Cobalt Strike User-Agent

Query · suricata

flow:established,to_server;
http.user_agent; bsize:78;
content:"Mozilla/5.0 (Windows NT 10.0|3b 20|Win32|3b 20|x32|3b 20|rv|3a|87.0b4) Gecko/201001 Firefox/87.0";
Raw source ET MALWARE Observed Cobalt Strike User-Agent · 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 Observed Cobalt Strike User-Agent";
    flow:established,to_server;
    http.user_agent; bsize:78;
    content:"Mozilla/5.0 (Windows NT 10.0|3b 20|Win32|3b 20|x32|3b 20|rv|3a|87.0b4) Gecko/201001 Firefox/87.0";
    reference:md5,9f2fe567dfe655efe8da577990aac077;
    classtype:trojan-activity;
    sid:2032951; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_05_13, deployment Perimeter, malware_family CobaltStrike, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;
)

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.