Most antivirus programs identify rndll.exe as malware—e.g. Microsoft identifies it as VirTool:Win32/CeeInject.gen!A, and TrendMicro identifies it as TROJ_Gen.CX06G0.
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The rndll.exe process does provide any valid information about its producer.
Description: Rndll.exe is not essential for Windows and will often cause problems. The file rndll.exe is located in the C:\Windows folder.
Known file sizes on Windows 10/8/7/XP are 107,661 bytes (33% of all occurrences), 114,829 bytes or 109,197 bytes.
It is a file with no information about its developer. The file is an unknown file in the Windows folder. The program has no visible window. The software is loaded during the Windows boot process (see Registry key: MACHINE\Run). It is not a Windows system file. Therefore the technical security rating is 85% dangerous.
Recommended: Identify rndll.exe related errors
Important: You should check the rndll.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active rndll process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the rndll.exe on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.
A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.