ET MALWARE Win32/SSLoad Registration Response

Query · suricata

flow:established,to_client;
flowbits:isset,ET.SSLoad1_1.Registration;
http.stat_code;
content:"200";
http.content_type;
content:"application/json";
file.data;
content:"|7b 22|key|22 3a 20 22|"; startswith; fast_pattern;
pcre:"/^[a-zA-Z0-9+\x2f=]{10,25}/R";
content:"|22 2c 20 22|id|22 3a 20 22|"; within:49;
pcre:"/^[a-f0-9]{8}-([a-f0-9]{4}-){3}[a-f0-9]{12}/R";
content:"|22 7d|"; endswith;
target:dest_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/SSLoad Registration Response · 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 Win32/SSLoad Registration Response";
    flow:established,to_client;
    flowbits:isset,ET.SSLoad1_1.Registration;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"application/json";
    file.data;
    content:"|7b 22|key|22 3a 20 22|"; startswith; fast_pattern;
    pcre:"/^[a-zA-Z0-9+\x2f=]{10,25}/R";
    content:"|22 2c 20 22|id|22 3a 20 22|"; within:49;
    pcre:"/^[a-f0-9]{8}-([a-f0-9]{4}-){3}[a-f0-9]{12}/R";
    content:"|22 7d|"; endswith;
    reference:md5,d6b0726de53f8a3da67a6e693485ca7a;
    reference:md5,ca303668b5420c022ef9c78ce1f2bfb7;
    classtype:trojan-activity;
    sid:2052169; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_04_18, deployment Perimeter, malware_family SSLoad, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_07, reviewed_at 2025_07_14;
    target:dest_ip;
)

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