| Software | Platform | Best For | | :--- | :--- | :--- | | | Win/Mac/Linux | Parametric 3D modeling (open source) | | LibreCAD | Win/Mac/Linux | 2D drafting (open source) | | DraftSight (Free tier) | Win/Mac | 2D CAD with familiar AutoCAD-like interface | | NanoCAD (Free version) | Win | .DWG file compatibility | | Autodesk Fusion 360 (Personal license) | Win/Mac | Free for hobbyists and non-commercial use |
As of the latest definitions, popular antivirus engines detect this file under various names:
One of the most dangerous variants of installs a cryptocurrency miner that runs silently in the background, causing high CPU usage and degraded system performance. Others drop password stealers that target browser saved logins and FTP credentials.
This appears to be related to a for an older 32-bit version of AutoCAD (likely AutoCAD 2009 or similar, based on the “acad9” in the name). The “Xf” prefix is typical of certain cracking tools, and “BITS” might refer to the background download service or just denote 32-bit.
: Security software like Malwarebytes and VIRY.CZ frequently categorize this file as RiskWare.Tool.HCK or RiskWare.Tool.CK .