ET MALWARE Win32/Unknown Stealer CnC Exfil via Telegram M2

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"caption|3d 0a 2a 2a 2a 20|";
http.host;
content:"api.telegram.org";
http.request_body;
content:"|50 4b|"; startswith;
content:"files.zip|50 4b|";
content:"CompleteClose.jpg"; distance:0; fast_pattern;
Raw source ET MALWARE Win32/Unknown Stealer CnC Exfil via Telegram M2 · 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 Win32/Unknown Stealer CnC Exfil via Telegram M2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"caption|3d 0a 2a 2a 2a 20|";
    http.host;
    content:"api.telegram.org";
    http.request_body;
    content:"|50 4b|"; startswith;
    content:"files.zip|50 4b|";
    content:"CompleteClose.jpg"; distance:0; fast_pattern;
    reference:md5,b9ff0b9cfe28765d55ab270dfa99333d;
    reference:url,twitter.com/suyog41/status/1635640558273146880;
    classtype:trojan-activity;
    sid:2044599; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_14, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_15;
)

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