ET MALWARE MSIL/Agent.DNL Server Response Task (whoami)

Query · suricata

flow:established,to_client;
http.content_type;
content:"application/json|3b|"; startswith;
file.data;
content:"|7b 22|command|22 3a 22|d2hvYW1p|22 7d|"; bsize:22; fast_pattern;
http.header_names;
content:"|0d 0a|Content-Type|0d 0a|Date|0d 0a|Content-Length|0d 0a 0d 0a|"; bsize:40;
Raw source ET MALWARE MSIL/Agent.DNL Server Response Task (whoami) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE MSIL/Agent.DNL Server Response Task (whoami)";
    flow:established,to_client;
    http.content_type;
    content:"application/json|3b|"; startswith;
    file.data;
    content:"|7b 22|command|22 3a 22|d2hvYW1p|22 7d|"; bsize:22; fast_pattern;
    http.header_names;
    content:"|0d 0a|Content-Type|0d 0a|Date|0d 0a|Content-Length|0d 0a 0d 0a|"; bsize:40;
    reference:md5,a6828081717974a89792548e1e31f29a;
    reference:url,twitter.com/fr0s7_/status/1428326979527381000;
    classtype:command-and-control;
    sid:2033744; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_19, deployment Perimeter, malware_family MSIL_Agent_DNL, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_19;
)

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