ET MALWARE Win32/Kumquat Loader Activity (Publish)

Query · suricata

flow:established,to_server;
flowbits:isset,ET.kumquat;
content:"|30|"; startswith;
content:"|00 0b|iot/server"; distance:2; within:12; fast_pattern;
pcre:"/^[0-9]{1}/R";
content:"|7b 0a 20 20 20 20 22 6d 73 67 22 3a 20 22|"; distance:0; within:15;
target:src_ip;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE Win32/Kumquat Loader Activity (Publish) · 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 MALWARE Win32/Kumquat Loader Activity (Publish)";
    flow:established,to_server;
    flowbits:isset,ET.kumquat;
    content:"|30|"; startswith;
    content:"|00 0b|iot/server"; distance:2; within:12; fast_pattern;
    pcre:"/^[0-9]{1}/R";
    content:"|7b 0a 20 20 20 20 22 6d 73 67 22 3a 20 22|"; distance:0; within:15;
    reference:md5,5e68e2c7b87e0c23904987e694f5b1ee;
    reference:md5,bff4ce3dbda522e92970c5d1d0471e63;
    classtype:trojan-activity;
    sid:2044068; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2023_02_02, deployment Perimeter, malware_family Kumquat, confidence High, signature_severity Major, tag TA416, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_12, reviewed_at 2024_05_07;
    target:src_ip;
)

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