ET MALWARE MSIL/Lightning Stealer Exfil Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.header_names;
content:!"|0d 0a|User-Agent|0d 0a|";
http.content_type;
content:"application/json"; bsize:16;
http.request_body;
content:"|22|LogChromes|22 3a|";
content:"|22|LogGecko|22 3a|";
content:"|22|Screen|22 3a 7b|"; fast_pattern;
content:"|22|Width|22 3a 22|"; distance:0;
content:"|22|ScreenshotBase64|22 3a 22|"; distance:0;
Raw source ET MALWARE MSIL/Lightning Stealer Exfil 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 MSIL/Lightning Stealer Exfil Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.header_names;
    content:!"|0d 0a|User-Agent|0d 0a|";
    http.content_type;
    content:"application/json"; bsize:16;
    http.request_body;
    content:"|22|LogChromes|22 3a|";
    content:"|22|LogGecko|22 3a|";
    content:"|22|Screen|22 3a 7b|"; fast_pattern;
    content:"|22|Width|22 3a 22|"; distance:0;
    content:"|22|ScreenshotBase64|22 3a 22|"; distance:0;
    reference:md5,1b922b6d15085da82e20fee0789a6617;
    reference:url,twitter.com/3xp0rtblog/status/1509484987401351177;
    classtype:trojan-activity;
    sid:2035679; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_31, deployment Perimeter, malware_family MSIL_Lightning, confidence High, signature_severity Major, tag Stealer, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_31;
)

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