ET MALWARE Win32/Ducktail Exfil Via Telegram CnC Response

Query · suricata

flow:established,to_client;
http.response_body;
content:"|7b 22|ok|22 3a|true|2c 22|result|22 3a 7b 22|"; startswith;
content:"|2c 22|text|22 3a 22|REQ|7c|";
pcre:"/^(?:[A-Z0-9]{8})-(?:[A-Z0-9]{4})-(?:[A-Z0-9]{4})-(?:[A-Z0-9]{4})-(?:[A-Z0-9]{12})/R";
content:"|7c|HELLO|7c|0|22 7d 7d|"; endswith; within:12; fast_pattern;
Raw source ET MALWARE Win32/Ducktail Exfil Via Telegram CnC Response · 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 Win32/Ducktail Exfil Via Telegram CnC Response";
    flow:established,to_client;
    http.response_body;
    content:"|7b 22|ok|22 3a|true|2c 22|result|22 3a 7b 22|"; startswith;
    content:"|2c 22|text|22 3a 22|REQ|7c|";
    pcre:"/^(?:[A-Z0-9]{8})-(?:[A-Z0-9]{4})-(?:[A-Z0-9]{4})-(?:[A-Z0-9]{4})-(?:[A-Z0-9]{12})/R";
    content:"|7c|HELLO|7c|0|22 7d 7d|"; endswith; within:12; fast_pattern;
    reference:url,twitter.com/SquiblydooBlog/status/1654890966606655488;
    reference:md5,d3ff692d6e816c72693d07f7b5bd4eca;
    classtype:trojan-activity;
    sid:2045617; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_08, deployment Perimeter, deployment SSLDecrypt, malware_family Ducktail, performance_impact Significant, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_09;
)

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