ET MALWARE Win32/Limbozar Ransomware Activity (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/postme"; bsize:7;
http.header;
content:"|0d 0a|from|3a 20|me|0d 0a|"; fast_pattern;
content:"|0d 0a|user-agent|3a 20|libsfml-network/";
http.request_body;
content:"&ip="; startswith;
content:"&disk="; distance:0;
content:"&id="; distance:0;
content:"&mail="; distance:0;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Win32/Limbozar Ransomware Activity (POST) · 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 Win32/Limbozar Ransomware Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/postme"; bsize:7;
    http.header;
    content:"|0d 0a|from|3a 20|me|0d 0a|"; fast_pattern;
    content:"|0d 0a|user-agent|3a 20|libsfml-network/";
    http.request_body;
    content:"&ip="; startswith;
    content:"&disk="; distance:0;
    content:"&id="; distance:0;
    content:"&mail="; distance:0;
    http.header_names;
    content:!"Referer";
    reference:url,securelist.com/cis-ransomware/104452/;
    reference:md5,91332f289d3e577b57d878b55c5cf18a;
    classtype:trojan-activity;
    sid:2034195; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_10_15, deployment Perimeter, malware_family Win32_Limbozar, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_15, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)

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