ET MALWARE Observed Python Stealer User-Agent (WhatsAppBackup/1.0) Outbound

Query · suricata

flow:established,to_server;
http.user_agent;
content:"WhatsAppBackup/1.0"; fast_pattern;
Raw source ET MALWARE Observed Python Stealer User-Agent (WhatsAppBackup/1.0) Outbound · 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 Observed Python Stealer User-Agent (WhatsAppBackup/1.0) Outbound";
    flow:established,to_server;
    http.user_agent;
    content:"WhatsAppBackup/1.0"; fast_pattern;
    reference:url,blog.sekoia.io/silver-fox-the-only-tax-audit-where-the-fine-print-installs-malware/;
    classtype:trojan-activity;
    sid:2068452; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2026_03_27, deployment Perimeter, confidence High, signature_severity Major, tag Stealer, tag c2, updated_at 2026_03_27, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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