ET MALWARE Win32/Blacklegion Ransomware CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"|2a 2a|Unique|2b|ID"; fast_pattern;
content:"|2a 2a|Personal|2b|ID";
http.host;
content:"api.telegram.org"; bsize:16;
Raw source ET MALWARE Win32/Blacklegion Ransomware CnC Checkin · 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 Win32/Blacklegion Ransomware CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"|2a 2a|Unique|2b|ID"; fast_pattern;
    content:"|2a 2a|Personal|2b|ID";
    http.host;
    content:"api.telegram.org"; bsize:16;
    reference:md5,9e37d89756eee8d24edecde880c2711a;
    reference:url,twitter.com/suyog41/status/1736713012747419681;
    classtype:trojan-activity;
    sid:2049718; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_18, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Blacklegion, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_18;
)

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