ET HUNTING WebDAV Retrieving .ps1

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;
)