ET MALWARE upStage Proxy Heartbeat

Query · suricata

flow:established,to_server;
dsize:2;
content:"|05 00|"; fast_pattern;
threshold:type limit,track by_src,count 5,seconds 120;
Raw source ET MALWARE upStage Proxy Heartbeat · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any <> $EXTERNAL_NET [1000,1001,1002] (
    msg:"ET MALWARE upStage Proxy Heartbeat";
    flow:established,to_server;
    dsize:2;
    content:"|05 00|"; fast_pattern;
    threshold:type limit,track by_src,count 5,seconds 120;
    reference:url,github.com/ShadowOpCode/DesckVB-RAT/tree/main;
    reference:md5,8f2f2b1a5666036ef7be2cd4d42eb281;
    classtype:trojan-activity;
    sid:2067604; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2026_02_11, deployment Perimeter, performance_impact Significant, confidence High, signature_severity Major, tag RAT, updated_at 2026_02_11, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1090, mitre_technique_name Proxy;
)

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.