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The winload.exe.mui (OS Loader) File Analysis

Updated 2 months ago
Checked by Malaware Check
winload.exe.mui

Technical Analysis

File Name winload.exe.mui
File Type
PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
Scanner Version 1.0.210.174
Database Version 2025-03-12 23:00:44 UTC
✓

Clean File

No threats detected by our scanner

0%
Detection Rate
33,080
File Size (bytes)
2025-03-12
Analysis Date

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File Identification

Hash Type Value Action
MD5
463b52d80b7d350196129a5b4ad317af
SHA1
54e92b0d252acdbff08e6987fb3fb328217a522f
SHA256
895f58768aa2de7cbea30ed850e644b908e4226f0e9c24b9250231bcb4482d0a
SHA512
1a77ddac83d7e56d239899090bf12c0f37f0f5415c89ef4fc6d5ecaf2c3c5e391adbb43f156619783995bcd1b1780dc0b9f4e87e65077b2f9d49a02b78323788

PE Analysis

Basic Information

▼
Image Base 0x10000000
Entry Point 0x10000000
Compilation Time 2008-10-09 23:57:06
Checksum 0x000100fc (Actual: 0x000100fc)
OS Version 5.0
PEiD Signatures PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
Digital Signature OK
Imports 0
Exports 0 functions
Resources 4 Resources
Sections 1 Sections

Version Information

▼
CompanyName Microsoft Corporation
FileDescription OS Loader
FileVersion 10.0.19041.3636 (WinBuild.160101.0800)
InternalName osloader.exe
LegalCopyright © Microsoft Corporation. All rights reserved.
OriginalFilename osloader.exe
ProductName Microsoft® Windows® Operating System
ProductVersion 10.0.19041.3636
Translation 0x0409 0x04b0

PE Sections

▼
Name Virtual Address Virtual Size Raw Size Entropy Characteristics MD5
.rsrc 0x00001000 24,576 bytes 22,528 bytes 3.63 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ AF83F7351E859BBA372A87450B2DAE4B

Resource Analysis

▼
Total Resources: 4 (21,694 bytes)
Resource Type Count Total Size Percentage
MUI 1 184 bytes
0.8%
RT_MESSAGETABLE 1 6,432 bytes
29.6%
RT_VERSION 1 900 bytes
4.1%
RT_HTML 1 14,178 bytes
65.4%

Certificate Chain Analysis

▼
Certificate Information
Product Microsoft® Windows® Operating System
Description OS Loader
File Version 10.0.19041.3636 (WinBuild.160101.0800)
Original Name osloader.exe
Signing Date 03:18 AM 10/20/2023 (596 days ago)
Verification Status Signed
Signers Microsoft Windows; Microsoft Windows Production PCA 2011; Microsoft Root Certificate Authority 2010
Counter Signers Microsoft Time-Stamp Service; Microsoft Time-Stamp PCA 2010; Microsoft Root Certificate Authority 2010
Internal Name osloader.exe
Copyright © Microsoft Corporation. All rights reserved.
Certificate Chain Summary
Microsoft Windows #1 Primary
Validity Period: 2023-02-03 00:05:42 → 2024-02-01 00:05:42
Signature Algorithm: sha256RSA
Serial Number: 33 00 00 04 15 82 95 A1 A3 D8 2E 28 57 00 00 00 00 04 15
Microsoft Windows Production PCA 2011 #2 Chain
Validity Period: 2011-10-19 18:41:42 → 2026-10-19 18:51:42
Signature Algorithm: sha256RSA
Serial Number: 61 07 76 56 00 00 00 00 00 08
Microsoft Time-Stamp Service #3 Chain
Validity Period: 2023-05-25 19:12:37 → 2024-02-01 19:12:37
Signature Algorithm: sha256RSA
Serial Number: 33 00 00 01 D7 9B 0D 1E 57 2E 8C 51 8E 00 01 00 00 01 D7
Microsoft Time-Stamp PCA 2010 #4 Chain
Validity Period: 2021-09-30 18:22:25 → 2030-09-30 18:32:25
Signature Algorithm: sha256RSA
Serial Number: 33 00 00 00 15 C5 E7 6B 9E 02 9B 49 99 00 00 00 00 00 15

✓ This file has been digitally signed and the certificate chain has been verified

  • The signature ensures file integrity and authenticity from the publisher
  • Timestamping proves when the signature was applied
Certificate Verification Status

OK

Remember: This is Result of Online Virus Scanner

Gridinsoft Anti-Malware has a much more powerful virus scanning engine. We recommend using it for a more precise diagnosis of infected systems. This brief guide will help you install our flagship product for more accurate diagnostics:

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Keep Your System Protected

This file appears clean, but regular security maintenance is important

  1. Regular Scans: Run weekly system scans to detect new threats before they can cause damage.
  2. Keep Software Updated: Ensure your operating system and all applications have the latest security patches.
  3. Safe Browsing: Avoid suspicious websites and never download software from untrusted sources.
  4. Email Security: Be cautious with email attachments and links, even from known contacts.
Proactive Protection
This file passed all security checks, but stay vigilant. New malware variants appear daily that can evade detection. Always verify files come from official sources and check digital signatures when available.

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