Should I block it?
No, this file is 100% safe to run.
 
     
    
        StdUtils.dll
NSIS StdUtils plug-in by LoRd_MuldeR
| Version:    | 1.0.0.0 | 
| MD5:    | 21010df9bc37daffcc0b5ae190381d85 | 
| SHA1:    | a8ba022aafc1233894db29e40e569dfc8b280eb9 | 
| SHA256:    | 0ebd62de633fa108cf18139be6778fa560680f9f8a755e41c6ab544ab8db5c16 | 
Overview
stdutils.dll is loaded as dynamic link library that runs in the context of a process. This particular version is usually found on Windows 7 Ultimate N (6.1.7601.65536).
Details
| File name: | stdutils.dll | 
| Publisher: | LoRd_MuldeR | 
| Product name: | NSIS StdUtils plug-in | 
| Typical file path: | C:\users\user\appdata\local\temp\nsfef07.tmp\stdutils.dll | 
| File version: | 1.0.0.0 | 
| Size: | 14 KB (14,336 bytes) | 
| Digital DNA | 
| PE subsystem: | Windows Console | 
| File packed: | No | 
| Code language: | Microsoft Visual C++ | 
| .NET CLR: | No | 
More details
Distribution by Windows OS
| OS version | distribution | 
| Windows 7 Ultimate N | 
100.00% | 
 |