ET MALWARE implant.js CnC Activity (Client PKT_FETCH for Evil Module)

Query · suricata

flow:established,to_server;
flowbits:isset,ET.implantjs.ack;
dsize:1;
content:"|80|";
threshold:type threshold, track by_src, count 5, seconds 60;
target:src_ip;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE implant.js CnC Activity (Client PKT_FETCH for Evil Module) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE implant.js CnC Activity (Client PKT_FETCH for Evil Module)";
    flow:established,to_server;
    flowbits:isset,ET.implantjs.ack;
    dsize:1;
    content:"|80|";
    threshold:type threshold, track by_src, count 5, seconds 60;
    reference:url,github.com/captainGeech42/implant.js;
    reference:url,districtcon.org/bios-and-talks-2025/implantjs-modular-malware;
    classtype:trojan-activity;
    sid:2060258; rev:3;
    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_Endpoint, tls_state plaintext, created_at 2025_02_21, deployment Perimeter, deployment Internal, malware_family implant_js, performance_impact Low, confidence High, signature_severity Major, tag c2, updated_at 2026_05_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    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.