ET MALWARE Enigma Locker Checkin

Query · suricata

flow:to_server,established;
urilen:8;
http.method;
content:"GET";
http.uri;
content:"/get.php"; fast_pattern;
http.header;
pcre:"/^Host\x3a\x20(?:\d{1,3}\.){3}\d{1,3}\r\nConnection\x3a\x20close(?:\r\n)+$/i";
http.connection;
content:"close";
http.header_names;
content:!"Accept";
content:!"Referer|0d 0a|";
content:!"User-Agent|0d 0a|";
Raw source ET MALWARE Enigma Locker Checkin · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Enigma Locker Checkin";
    flow:to_server,established;
    urilen:8;
    http.method;
    content:"GET";
    http.uri;
    content:"/get.php"; fast_pattern;
    http.header;
    pcre:"/^Host\x3a\x20(?:\d{1,3}\.){3}\d{1,3}\r\nConnection\x3a\x20close(?:\r\n)+$/i";
    http.connection;
    content:"close";
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    content:!"User-Agent|0d 0a|";
    reference:md5,229b639878c9e932ef8028d2875526b9;
    reference:md5,b4c5edd3ba110e0fdb420277f24bd0b0;
    reference:url,www.bleepingcomputer.com/news/security/the-enigma-ransomware-targets-russian-speaking-users/;
    classtype:command-and-control;
    sid:2023334; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_10_12, deployment Perimeter, malware_family Ransomware, malware_family Enigma, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_11_03;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.