ET INFO Observed Abused File Sharing/CRM Platform (pipedrive-files-*-pipedrive .com .s3 .* .amazonaws .com) in TLS SNI

Query · suricata

flow:established,to_server;
tls.sni;
content:"pipedrive-files-"; startswith;
pcre:"/^[a-z]{3}-\d{1,2}/R";
content:"-pipedrive-com.s3"; within:24; fast_pattern;
content:".amazonaws.com"; endswith;
Raw source ET INFO Observed Abused File Sharing/CRM Platform (pipedrive-files-*-pipedrive .com .s3 .* .amazonaws .com) in TLS SNI · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET INFO Observed Abused File Sharing/CRM Platform (pipedrive-files-*-pipedrive .com .s3 .* .amazonaws .com) in TLS SNI";
    flow:established,to_server;
    tls.sni;
    content:"pipedrive-files-"; startswith;
    pcre:"/^[a-z]{3}-\d{1,2}/R";
    content:"-pipedrive-com.s3"; within:24; fast_pattern;
    content:".amazonaws.com"; endswith;
    classtype:misc-activity;
    sid:2052706; rev:1;
    metadata:affected_product Any, attack_target Client_and_Server, tls_state TLSEncrypt, created_at 2024_05_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag TA_Abused_Service, updated_at 2024_05_16;
)

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