add nvm dataset for flow data

Author: nasbench

datasets/cisco_network_visibility_module/cisco_nvm_flowdata/nvm_flowdata.log

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fd282be58d836f3b6e5fda77e0c42640f6706308be4eb6d59ddd0d0bd409e149
+size 72361

datasets/cisco_network_visibility_module/cisco_nvm_flowdata/nvm_flowdata.yml

@@ -0,0 +1,11 @@
+author: Nasreddine Bencherchali, Splunk
+id: a0b50980-bad7-4f55-be33-3210f3902bdc
+date: '2025-06-23'
+description: Generated datasets for Cisco Network Visibility Module Flow Data EventType.
+dataset:
+- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/cisco_network_visibility_module/cisco_nvm_flowdata/nvm_flowdata.log
+sourcetypes:
+- cisco:nvm:flowdata
+references:
+- https://www.cisco.com/c/en/us/td/docs/security/vpn_client/anyconnect/Cisco-Secure-Client-5/admin/guide/nvm-collector-5-1-1-admin-guide.html
+- https://community.cisco.com/t5/security-knowledge-base/cisco-network-visibility-nvm-collector/ta-p/4309825