GridinSoft Threat Intelligence

np-mswmp.dll file report

Clean record File reputation report
MD5 99f97c9fe748c37528c338a423577fcb
Latest seen 2026-05-09 23:01:11 (2 weeks ago)
First seen 2017-05-21 04:03:13 (9 years ago)
Size 159 KB
Publisher Microsoft Corporation
Product Microsoft® Windows Media Player Firefox Plugin
Signed by Microsoft Corporation

Why it matters

Evidence available for this file

Detection

Latest status is clean for this hash.

Timeline

First seen 2017-05-21 04:03:13 (9 years ago); latest analysis 2026-05-09 23:01:11 (2 weeks ago).

Publisher context

Company metadata: Microsoft Corporation. Product metadata: Microsoft® Windows Media Player Firefox Plugin.

Digital signature

Signed by Microsoft Corporation. The signature is reported as valid, but signed files can still be bundled or abused.

Observed locations

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

  1. Confirm the hash and publisher match the expected software.
  2. Review the observed locations and signature information below.
  3. Rescan if the file was downloaded from an unknown source or appears in an unusual path.

File context

np-mswmp.dll is a Windows file recorded in the ThreatInfo database. It is associated with Microsoft® Windows Media Player Firefox Plugin. The reported company name is Microsoft Corporation. The current detection status is Clean, based on the latest analysis from 2026-05-09 23:01:11 (2 weeks 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® Windows Media Player Firefox Plugin
Company Name: Microsoft Corporation
MD5: 99f97c9fe748c37528c338a423577fcb
Size: 159 KB
First Published: 2017-05-21 04:03:13 (9 years ago)
Latest Published: 2026-05-09 23:01:11 (2 weeks ago)
Status: Clean (on last analysis)
Analysis Date: 2026-05-09 23:01:11 (2 weeks ago)

Overview

Signed By: Microsoft Corporation
Status: Valid

The signature on np-mswmp.dll is reported as valid. A valid signature helps confirm publisher identity, but it does not automatically make the file safe if the installer was bundled, abused, or downloaded from an untrusted source.

Common Places:

%appdata%\360se6\application\6.3.1.150\plugins
%appdata%\360se6\application\8.1.1.158\plugins
%appdata%\360se6\application\8.1.1.256\plugins
%appdata%\0f01352e-94df-4a62-b30e-a19806922546\3.9.4908.0\plugins
%appdata%\b4f9e660-3974-4e79-8450-c37d99502759\3.9.4908.0\plugins
%programfiles%\2345soft\2345explorer\plugins
%appdata%\b4f9e660-3974-4e79-8450-c37d99502759\3.9.5246.0\plugins
%localappdata%\kiwertphiverward\thjughtkakeshbabgh\extensions\hokdglbhghcebcopdbanieangmcamaak\1.0_0
%appdata%\profiles\drhatherdrerght.default\extensions\{51a86bb3-6602-4c85-92a5-130ee4864f13}\plugins
%appdata%\profiles\drhatherdrerght.default\extensions\{f999a48b-1950-4d81-9971-79018f807b4b}\plugins

ThreatInfo has observed np-mswmp.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 np-mswmp.dll across 51 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country China
Share 38.9%
Low High activity

The strongest geographic signal for this file is China with 38.9% of observed hits. Geographic distribution can help identify targeted campaigns, regional software bundles, or where a file is most commonly reported.

OS Version:

Windows 10 58.9%
Windows 7 27.0%
Windows Server 2012 R2 4.6%
Windows 8.1 3.2%
Windows Server 2008 R2 2.9%
Windows XP 1.7%
Windows Server 2012 0.5%
Windows Vista 0.5%
Windows Server 2003 0.4%
Windows Server 2016 0.2%
Windows 8 0.2%

The most common operating system signal for np-mswmp.dll is Windows 10 with 58.9% 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

np-mswmp.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.

Format pe
Architecture 32-bit
Subsystem Windows CUI
Entry point 0x0001ad47
Image base 0x00400000

PE Sections:

Sections 4
Raw data 152576

Section layout highlights raw-size concentration, repeated names, packer markers, and hashes that can be compared across related samples.

.text 131072 bytes · 85.9% of section data
MD5 c548af63ecc94034f35a497bd6646e7a
.data 8192 bytes · 5.4% of section data
MD5 7f5817b74946141e1c477c186bc4a307
.rsrc 1536 bytes · 1.0% of section data
MD5 2b2533c15671c6e7336cfa728d39f7fa
.reloc 11776 bytes · 7.7% of section data
MD5 04797e3e674983a2d0c696c7911804a9

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.

Scan with GridinSoft Anti-Malware Use a local scan if the file origin or behavior is unclear. Check this hash on VirusTotal

Recommended next steps

  • Compare the local file MD5 with 99f97c9fe748c37528c338a423577fcb.
  • Check the file path, publisher, and signature against the details in this report.
  • Run a GridinSoft scan if the source, path, or behavior looks unusual.