ET MALWARE Observed Cobalt Strike User-Agent

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Mozilla/5.0 (compatible|3b 20|MSIE 9.0|3b 20|Windows NT 6.1|3b 20|WOW64|3b 20|Trident/5.0|3b 20|BOIE9|3b|ENGB)"; bsize:82;
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;
    content:"Mozilla/5.0 (compatible|3b 20|MSIE 9.0|3b 20|Windows NT 6.1|3b 20|WOW64|3b 20|Trident/5.0|3b 20|BOIE9|3b|ENGB)"; bsize:82;
    classtype:trojan-activity;
    sid:2028598; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_09_18, deployment Perimeter, malware_family Cobalt_Strike, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_09_28;
)

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