ET MALWARE APT29/WellMess CnC Activity

Query · suricata

flow:established,to_server;
content:"+++|0d 0a|"; fast_pattern;
urilen:1;
http.method;
content:"POST";
http.cookie;
content:"+++"; endswith;
http.request_body;
pcre:"/^(?:[\x3a\x2c\x2e]?[A-Za-z0-9]{1,8}[\x3a\x2c\x2e]?[\x3a\x2c\x2e]?\s*){50,}$/si";
http.header_names;
content:!"Referer";
Raw source ET MALWARE APT29/WellMess CnC Activity · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE APT29/WellMess CnC Activity";
    flow:established,to_server;
    content:"+++|0d 0a|"; fast_pattern;
    urilen:1;
    http.method;
    content:"POST";
    http.cookie;
    content:"+++"; endswith;
    http.request_body;
    pcre:"/^(?:[\x3a\x2c\x2e]?[A-Za-z0-9]{1,8}[\x3a\x2c\x2e]?[\x3a\x2c\x2e]?\s*){50,}$/si";
    http.header_names;
    content:!"Referer";
    reference:md5,861879f402fe3080ab058c0c88536be4;
    reference:url,ncsc.gov.uk/files/Advisory-APT29-targets-COVID-19-vaccine-development.pdf;
    classtype:trojan-activity;
    sid:2030534; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Linux, attack_target Client_Endpoint, created_at 2020_07_16, deployment Perimeter, malware_family WellMess, confidence High, signature_severity Major, updated_at 2020_09_16;
)

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