ET RETIRED Vidar Stealer CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/";
http.header;
content:"|0d 0a|X-Id|3a 20|"; fast_pattern;
pcre:"/^[a-f0-9]{32}\r\n/R";
http.header_names;
content:"|0d 0a|X-ID|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|";
content:!"Referer";
target:src_ip;
Raw source ET RETIRED Vidar Stealer CnC 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 RETIRED Vidar Stealer CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/";
    http.header;
    content:"|0d 0a|X-Id|3a 20|"; fast_pattern;
    pcre:"/^[a-f0-9]{32}\r\n/R";
    http.header_names;
    content:"|0d 0a|X-ID|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|";
    content:!"Referer";
    classtype:trojan-activity;
    sid:2044788; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_27, deployment Perimeter, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_30, reviewed_at 2024_09_30;
    target:src_ip;
)

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