ET MALWARE WallStealer User-Agent Observed (SystemInfo Client)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"systeminfo|20|client|2f|"; fast_pattern; startswith; nocase;
target:src_ip;
Raw source ET MALWARE WallStealer User-Agent Observed (SystemInfo Client) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE WallStealer User-Agent Observed (SystemInfo Client)";
    flow:established,to_server;
    http.user_agent;
    content:"systeminfo|20|client|2f|"; fast_pattern; startswith; nocase;
    reference:url,bazaar.abuse.ch/sample/903cdf6c4bef90c7bcdacd909cc7e9c2be528a4de785f0aa2c19c6a1e4166a53/;
    reference:md5,6dac8ea22fcefdb84142c0ffc62ffb18;
    classtype:trojan-activity;
    sid:2065822; 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 WallStealer, 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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