ET MALWARE [PTsecurity] Win32/TinyNuke Payload ACF40 Inbound


Query · suricata

flow:established,to_client;
flowbits:isset,ET.TinyNuke;
http.stat_code;
content:"200";
http.content_type;
content:"text|2F|html"; startswith;
file.data;
byte_extract:8,896,byte0;
byte_extract:8,904,byte1;
byte_extract:8,912,byte2;
byte_extract:8,920,byte3;
byte_extract:8,928,byte4;
byte_test:8,=,byte0,936;
byte_test:8,!=,byte0,944;
byte_test:8,=,byte1,944;
byte_test:8,!=,byte1,952;
byte_test:8,=,byte2,952;
byte_test:8,!=,byte2,960;
byte_test:8,=,byte3,960;
byte_test:8,=,byte4,968;
content:!"MZ"; depth:2;
pcre:"/[\x80-\xff]{16}/";

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 [PTsecurity] Win32/TinyNuke Payload ACF40 Inbound · 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 [PTsecurity] Win32/TinyNuke Payload ACF40 Inbound";
    flow:established,to_client;
    flowbits:isset,ET.TinyNuke;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"text|2F|html"; startswith;
    file.data;
    byte_extract:8,896,byte0;
    byte_extract:8,904,byte1;
    byte_extract:8,912,byte2;
    byte_extract:8,920,byte3;
    byte_extract:8,928,byte4;
    byte_test:8,=,byte0,936;
    byte_test:8,!=,byte0,944;
    byte_test:8,=,byte1,944;
    byte_test:8,!=,byte1,952;
    byte_test:8,=,byte2,952;
    byte_test:8,!=,byte2,960;
    byte_test:8,=,byte3,960;
    byte_test:8,=,byte4,968;
    content:!"MZ"; depth:2;
    pcre:"/[\x80-\xff]{16}/";
    reference:url,github.com/ptresearch/AttackDetection;
    classtype:trojan-activity;
    sid:2024513; rev:6;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_02, deployment Perimeter, malware_family TinyNuke, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_08_17;
)

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