ET MALWARE Jaff Ransomware Checkin M1

Query · suricata

flow:to_server,established;
urilen:4;
http.request_line;
content:"GET /a5/ HTTP/1."; depth:16; fast_pattern;
http.header_names;
content:"|0d 0a|Host|0d 0a 0d 0a|"; depth:10; endswith;
Raw source ET MALWARE Jaff Ransomware Checkin M1 · Suricata
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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 Jaff Ransomware Checkin M1";
    flow:to_server,established;
    urilen:4;
    http.request_line;
    content:"GET /a5/ HTTP/1."; depth:16; fast_pattern;
    http.header_names;
    content:"|0d 0a|Host|0d 0a 0d 0a|"; depth:10; endswith;
    reference:md5,924c84415b775af12a10366469d3df69;
    reference:url,blog.dynamoo.com/2017/05/malware-spam-with-nmpdf-attachment.html;
    classtype:command-and-control;
    sid:2024290; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_05_11, deployment Perimeter, malware_family Jaff_Ransomware, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_05, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)

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