Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING WebDAV Retrieving .ps1"; flow:established,to_server; http.method; content:"PROPFIND"; http.uri; content:".ps1"; endswith; http.user_agent; content:"Microsoft-WebDAV-MiniRedir/"; startswith; fast_pattern; http.header_names; content:!"|0d 0a|referer|0d 0a|"; classtype:bad-unknown; sid:2064999; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, tls_state plaintext, created_at 2025_09_30, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_30, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1105, mitre_technique_name Ingress_Tool_Transfer; target:src_ip;)