ET MALWARE WallStealer CnC Response M3

Query · suricata

flow:established,to_client;
flowbits:isset,ET.WallStealer.Checkin;
http.stat_code;
content:"200";
http.response_body;
content:"|7b 22|status|22 3a 22|success|22 2c 22|message|22 3a 22|DLL|20|loaded|20|and|20|encrypted|22 2c 22|dll_name|22 3a 22|"; fast_pattern; startswith;
content:"|22 2c 22|ip|22 3a 22|"; within:80;
content:"|22 2c 22|collected_count|22 3a|"; within:40;
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 WallStealer CnC Response M3 · 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 WallStealer CnC Response M3";
    flow:established,to_client;
    flowbits:isset,ET.WallStealer.Checkin;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"|7b 22|status|22 3a 22|success|22 2c 22|message|22 3a 22|DLL|20|loaded|20|and|20|encrypted|22 2c 22|dll_name|22 3a 22|"; fast_pattern; startswith;
    content:"|22 2c 22|ip|22 3a 22|"; within:80;
    content:"|22 2c 22|collected_count|22 3a|"; within:40;
    reference:url,bazaar.abuse.ch/sample/903cdf6c4bef90c7bcdacd909cc7e9c2be528a4de785f0aa2c19c6a1e4166a53/;
    reference:md5,6dac8ea22fcefdb84142c0ffc62ffb18;
    classtype:trojan-activity;
    sid:2065828; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_11_19, deployment Perimeter, malware_family Stealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_19, mitre_tactic_id TA0009, mitre_tactic_name Collection, mitre_technique_id T1005, mitre_technique_name Data_from_local_system;
    target:src_ip;
)

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