ET MALWARE Possible Kaseya VSA Exploit Activity Inbound M1

Query · suricata

flow:established,to_server;
flowbits:isset,ET.kaseya1;
http.method;
content:"GET";
http.uri;
content:"/done.asp"; endswith; fast_pattern;
http.user_agent;
content:"curl/"; startswith;

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 Possible Kaseya VSA Exploit Activity Inbound M1 · 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 Possible Kaseya VSA Exploit Activity Inbound M1";
    flow:established,to_server;
    flowbits:isset,ET.kaseya1;
    http.method;
    content:"GET";
    http.uri;
    content:"/done.asp"; endswith; fast_pattern;
    http.user_agent;
    content:"curl/"; startswith;
    reference:url,www.huntress.com/blog/rapid-response-kaseya-vsa-mass-msp-ransomware-incident;
    classtype:trojan-activity;
    sid:2033250; rev:2;
    metadata:affected_product Kaseya_VSA, attack_target Client_Endpoint, created_at 2021_07_06, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_10, reviewed_at 2024_05_06;
)

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