ET MALWARE Subterranean Crimson Rat - GetInfo Command

Query · suricata

flow:established,to_client;
content:"crimson.universal.containers.Message";
content:"CLIENT_getInfo"; nocase; fast_pattern;
content:"|00|"; within:4;
pcre:"/^.\d{1,2}\.\d+\.\d+/R";
Raw source ET MALWARE Subterranean Crimson Rat - GetInfo Command · Suricata
Esc
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 Subterranean Crimson Rat - GetInfo Command";
    flow:established,to_client;
    content:"crimson.universal.containers.Message";
    content:"CLIENT_getInfo"; nocase; fast_pattern;
    content:"|00|"; within:4;
    pcre:"/^.\d{1,2}\.\d+\.\d+/R";
    reference:url,twitter.com/James_inthe_box/status/1488987814066753538;
    classtype:trojan-activity;
    sid:2035069; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_02_03, deployment Perimeter, malware_family Subterranean_Crimson, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_03;
)

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