ET INFO Observed Online Document Sharing Service Domain (onlyoffice .com in TLS SNI)
Sourceet/open
CreatedJune 4, 2025
UpdatedJune 4, 2025
Classificationmisc-activity
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Observed Online Document Sharing Service Domain (onlyoffice .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".onlyoffice.com"; endswith; fast_pattern; threshold:type limit,count 1,seconds 300,track by_src; classtype:misc-activity; sid:2062768; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_06_04, deployment Perimeter, confidence High, signature_severity Informational, tag TA_Abused_Service, updated_at 2025_06_04;)
Metadata
attack targetClient_Endpoint
created at2025_06_04
deploymentPerimeter
confidenceHigh
signature severityInformational
tagTA_Abused_Service
updated at2025_06_04
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