GridinSoft Threat Intelligence
System.IO.dll file report
Why it matters
Evidence available for this file
Latest status is clean for this hash.
First seen 2020-12-20 16:31:00 (5 years ago); latest analysis 2026-05-13 20:00:55 (4 days ago).
Company metadata: Microsoft Corporation. Product metadata: Microsoft® .NET Core.
Signed by Microsoft Corporation. ThreatInfo marks this publisher as trusted for this record.
ThreatInfo has seen this file in user or system paths listed below. Unexpected locations increase the need for local verification.
Recommended action
What to do next
- Confirm the hash and publisher match the expected software.
- Review the observed locations and signature information below.
- Rescan if the file was downloaded from an unknown source or appears in an unusual path.
File context
System.IO.dll is a Windows file recorded in the ThreatInfo database. It is associated with Microsoft® .NET Core. The reported company name is Microsoft Corporation. The current detection status is Clean, based on the latest analysis from 2026-05-13 20:00:55 (4 days ago).
This record is currently marked as clean, but file reputation can depend on the exact path, hash, and source. Compare the MD5 and publisher data below with the file on your system.
File Details
| Product Name: | Microsoft® .NET Core |
| Company Name: | Microsoft Corporation |
| MD5: | 00d5ae6b7f2a31b1f8140d70c6327b27 |
| Size: | 13 KB |
| First Published: | 2020-12-20 16:31:00 (5 years ago) |
| Latest Published: | 2026-05-13 20:00:55 (4 days ago) |
| Status: | Clean (on last analysis) | |
| Analysis Date: | 2026-05-13 20:00:55 (4 days ago) |
Overview
| Signed By: | Microsoft Corporation |
| Status: | Trusted Publisher |
ThreatInfo marks this publisher as trusted for this record, but the file hash and source should still match the expected software distribution.
Common Places:
| %programfiles% |
| %commonappdata%\totalav\updates\5_15_69 |
ThreatInfo has observed System.IO.dll in the locations listed above. Files found in temporary folders, user profile folders, startup locations, or unusual application directories should be reviewed more carefully than files installed under a known program directory.
Geographic signal
Observed country distribution
ThreatInfo has seen System.IO.dll across 25 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is United States with 12.5% of observed hits. Geographic distribution can help identify targeted campaigns, regional software bundles, or where a file is most commonly reported.
OS Version:
The most common operating system signal for System.IO.dll is Windows 10 with 88.1% of observed hits. If your system differs from the common profile, check whether the file was introduced by a specific installer, archive, or removable device.
Analysis
System.IO.dll is identified as pe for 32-bit systems. The subsystem is Windows CUI. PE header values are useful for triage, especially when they do not match the expected publisher, product, or release timeline.
.NET Info:
| MVID: | 8ebab03e-7820-4cdd-a2ca-36de41c163a3 |
PE Sections:
Section layout highlights raw-size concentration, repeated names, packer markers, and hashes that can be compared across related samples.
bf619eac0cdf3f68d496ea9344137e8b
1af226c017c0e42e723d2f3d841a70df
PE section names and hashes can reveal packing, injected resources, or unusual build artifacts. Sections with uncommon names, very large raw data, or hashes that differ from a trusted copy deserve additional review.
Report conclusion
This hash is currently recorded as clean
Use the MD5, publisher, signature, and observed paths in this report to verify that the file on your device is the same copy described here.