ET MALWARE Observed Buran Ransomware UA

Query · suricata

flow:established,to_server;
http.user_agent;
content:"fuck u"; nocase; bsize:6;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Observed Buran Ransomware UA · 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 Buran Ransomware UA";
    flow:established,to_server;
    http.user_agent;
    content:"fuck u"; nocase; bsize:6;
    http.header_names;
    content:!"Referer";
    classtype:command-and-control;
    sid:2028991; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_18, deployment Perimeter, confidence Medium, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_27, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)

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