ET USER_AGENTS Microsoft Office Existence Discovery User-Agent

7.0.35.0SID: 2041131Rev: 2Enabled8 views
Sourceet/open
Fileemerging-user_agents.rules
CreatedNovember 30, 2022
UpdatedMarch 26, 2024
Classificationmisc-activity
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Microsoft Office Existence Discovery User-Agent"; flow:established,to_server; http.user_agent; bsize:36; content:"Microsoft Office Existence Discovery"; threshold:type both, track by_src, count 1, seconds 600; classtype:misc-activity; sid:2041131; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_11_30, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_26, reviewed_at 2025_10_24;)

Metadata

attack targetClient_Endpoint
created at2022_11_30
deploymentPerimeter
confidenceHigh
signature severityInformational
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_03_26
reviewed at2025_10_24

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