ET RETIRED Malvirt/KoiVM Downloader Variant Payload Retrieval Request

Query · suricata

flow:established, to_server;
dsize:38;
stream_size:client,=,39;
content:"get_"; fast_pattern; startswith;
pcre:"/^[a-f0-9]{32}\x0d\x0a$/R";
Raw source ET RETIRED Malvirt/KoiVM Downloader Variant Payload Retrieval Request · Suricata
Esc
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 -> $EXTERNAL_NET any (
    msg:"ET RETIRED Malvirt/KoiVM Downloader Variant Payload Retrieval Request";
    flow:established, to_server;
    dsize:38;
    stream_size:client,=,39;
    content:"get_"; fast_pattern; startswith;
    pcre:"/^[a-f0-9]{32}\x0d\x0a$/R";
    reference:md5,dad996ac644cafb4c238bbd162945114;
    reference:url,scribe.froth.zone/walmartglobaltech/malvert-koivm-downloader-variant-ed4a88920b8c;
    reference:url,www.sentinelone.com/labs/malvirt-net-virtualization-thrives-in-malvertising-attacks/;
    classtype:trojan-activity;
    sid:2044003; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_01_26, deployment Perimeter, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_30, reviewed_at 2024_09_30;
)

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