ET MALWARE MSIL/Spyware Activity via Telegram (Response)

Query · suricata

flowbits:isset,ET.generictelegram;
flow:established,to_client;
http.stat_code;
content:"200";
http.content_type;
content:"application/json"; bsize:16;
file.data;
content:"|7b 22 6f 6b 22 3a 74 72 75 65 2c 22 72 65 73 75 6c 74 22 3a 7b 22|"; startswith; fast_pattern;
content:"|22 74 65 78 74 22 3a 22 54 68 69 73 20 4e 6f 74 20 52 44 50 22 7d 7d|"; endswith;
target:dest_ip;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE MSIL/Spyware Activity via Telegram (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 MSIL/Spyware Activity via Telegram (Response)";
    flowbits:isset,ET.generictelegram;
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.content_type;
    content:"application/json"; bsize:16;
    file.data;
    content:"|7b 22 6f 6b 22 3a 74 72 75 65 2c 22 72 65 73 75 6c 74 22 3a 7b 22|"; startswith; fast_pattern;
    content:"|22 74 65 78 74 22 3a 22 54 68 69 73 20 4e 6f 74 20 52 44 50 22 7d 7d|"; endswith;
    reference:md5,565c800fc3b9b39c391ba166d10f333c;
    reference:md5,677fe464113ddf9a9523439b6de0f22b;
    reference:url,twitter.com/suyog41/status/1653377212664659968;
    classtype:trojan-activity;
    sid:2045614; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_05_08, deployment Perimeter, deployment SSLDecrypt, malware_family MSIL_Spyware, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_08;
    target:dest_ip;
)

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