ET MALWARE Adaptix C2 Default User-Agent Observed

Query · suricata

flow:established,to_server;
http.user_agent;
content:"Mozilla/5.0|20 28|Windows NT 6.2|3b 20|rv|3a|20.0|29 20|Gecko/20121202|20|Firefox/20.0"; fast_pattern;
target:src_ip;
Raw source ET MALWARE Adaptix C2 Default User-Agent Observed · 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 Adaptix C2 Default User-Agent Observed";
    flow:established,to_server;
    http.user_agent;
    content:"Mozilla/5.0|20 28|Windows NT 6.2|3b 20|rv|3a|20.0|29 20|Gecko/20121202|20|Firefox/20.0"; fast_pattern;
    reference:url,github.com/Adaptix-Framework/AdaptixC2/blob/a7401fa3fdbc7ae6b632c40570292f844e40ff40/Extenders/listener_beacon_http/config.json;
    classtype:trojan-activity;
    sid:2063044; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, affected_product Windows_11, attack_target Client_and_Server, tls_state TLSDecrypt, created_at 2025_06_18, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Adaptix, updated_at 2025_06_18, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
    target:src_ip;
)

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.