ET MALWARE Crimson RAT CnC Victim Details Exfil

Query · suricata

flow:established,to_server;
content:"|00 00 00 00|"; offset:1; depth:4;
content:"="; distance:5; within:5;
content:"|00 00 00 7c|"; distance:0;
content:"|7c 7c|C|3a 5c|Users|5c|"; distance:0; fast_pattern;
Raw source ET MALWARE Crimson RAT CnC Victim Details Exfil · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Crimson RAT CnC Victim Details Exfil";
    flow:established,to_server;
    content:"|00 00 00 00|"; offset:1; depth:4;
    content:"="; distance:5; within:5;
    content:"|00 00 00 7c|"; distance:0;
    content:"|7c 7c|C|3a 5c|Users|5c|"; distance:0; fast_pattern;
    reference:url,x.com/naumovax/status/1818646536600822231;
    reference:md5,f5380e7a6e15a0ef27e6f31fcc29ed4d;
    classtype:trojan-activity;
    sid:2054812; 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_07_31, deployment Perimeter, malware_family CrimsonRAT, confidence High, signature_severity Critical, updated_at 2024_07_31;
)

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