ET MALWARE Suspected Kapeka/ICYWELL Backdoor Server Response (execute command)

Query · suricata

flow:established,to_client;
file.data;
content:"|3a 20 22|Execute|20|command|22|,"; fast_pattern;
target:dest_ip;
Raw source ET MALWARE Suspected Kapeka/ICYWELL Backdoor Server Response (execute command) · 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 http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Suspected Kapeka/ICYWELL Backdoor Server Response (execute command)";
    flow:established,to_client;
    file.data;
    content:"|3a 20 22|Execute|20|command|22|,"; fast_pattern;
    reference:url,labs.withsecure.com/content/dam/labs/docs/WithSecure-Research-Kapeka.pdf;
    reference:url,services.google.com/fh/files/misc/apt44-unearthing-sandworm.pdf;
    classtype:trojan-activity;
    sid:2052172; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_04_19, deployment Perimeter, deployment SSLDecrypt, malware_family SANDWORM, malware_family APT44, confidence Medium, signature_severity Critical, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_19;
    target:dest_ip;
)

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