ET MALWARE Unk.DPRK MalDoc SysInfo CnC Exfil

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.request_body;
content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|MAX_FILE_SIZE|22 0d 0a|";
content:"name=|22|userfile|22 3b 20|filename=|22|yo|22 0d 0a|"; distance:0; fast_pattern;
http.header_names;
content:!"Referer";
content:!"User-Agent";
content:!"Accept";
Raw source ET MALWARE Unk.DPRK MalDoc SysInfo CnC Exfil · 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 Unk.DPRK MalDoc SysInfo CnC Exfil";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|MAX_FILE_SIZE|22 0d 0a|";
    content:"name=|22|userfile|22 3b 20|filename=|22|yo|22 0d 0a|"; distance:0; fast_pattern;
    http.header_names;
    content:!"Referer";
    content:!"User-Agent";
    content:!"Accept";
    reference:md5,8a7686430d9ad2832e8a4c3992186b36;
    classtype:trojan-activity;
    sid:2033331; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_07_15, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_15;
)

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