ET MALWARE [ANY.RUN] NjRat (tXRAT v.2.3R) Server Sends Plugin to Client

Query · suricata

flow:established,to_client;
content:"XSendPlugin|7c|"; offset:3; depth:20; fast_pattern;
pcre:"/^\d{2,5}\x00/";
Raw source ET MALWARE [ANY.RUN] NjRat (tXRAT v.2.3R) Server Sends Plugin to Client · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE [ANY.RUN] NjRat (tXRAT v.2.3R) Server Sends Plugin to Client";
    flow:established,to_client;
    content:"XSendPlugin|7c|"; offset:3; depth:20; fast_pattern;
    pcre:"/^\d{2,5}\x00/";
    reference:md5,917d3bcc7cbe4668fa22b8bc2f0a4092;
    reference:url,community.emergingthreats.net/t/njrat-variant-txrat-v-2-3r;
    reference:url,checkpoint.com/cyber-hub/threat-prevention/what-is-malware/what-is-njrat-malware/;
    classtype:command-and-control;
    sid:2053791; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_06_21, deployment Perimeter, malware_family njrat, confidence High, signature_severity Critical, tag RAT, updated_at 2024_06_21;
)

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