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The winload.exe (OS Loader) File Analysis

Updated 2 months ago
Checked by Malaware Check
winload.exe

Technical Analysis

File Name winload.exe
File Type
PE32+ executable (DLL) x86-64, 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
1,574,936
File Size (bytes)
2025-03-12
Analysis Date

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File Identification

Hash Type Value Action
MD5
e5b7e758a28d20c389fc5f38cc349c06
SHA1
d1d4f68e85be7174821e87b5405835f160068f4f
SHA256
5731e2902f7ce83ed988e605e2225a6f9b48009396616c99a3590560f299d844
SHA512
9f81fabbd671bee7299ea9afbbae6da0b1286e9c4c95119a8927d736f31825c65e2c4c3c0377a2102309b4af14b6647b9ed546fd453ab2e8e60f1d75d30d16e0

PE Analysis

Basic Information

▼
Image Base 0x180000000
Entry Point 0x180001090
Compilation Time 1995-01-28 23:10:28
Checksum 0x001870f5 (Actual: 0x001870f5)
OS Version 0.0
PEiD Signatures PE32+ executable (DLL) x86-64, for MS Windows
PDB Path winload_prod.pdb
Digital Signature OK
Imports 0
Exports 391 functions
Resources 5 Resources
Sections 9 Sections

Version Information

▼
CompanyName Microsoft Corporation
FileDescription OS Loader
FileVersion 10.0.19041.5438 (WinBuild.160101.0800)
InternalName osloader.exe
LegalCopyright © Microsoft Corporation. All rights reserved.
OriginalFilename osloader.exe
ProductName Microsoft® Windows® Operating System
ProductVersion 10.0.19041.5438
Translation 0x0409 0x04b0

PE Sections

▼
Name Virtual Address Virtual Size Raw Size Entropy Characteristics MD5
.text 0x00001000 1,265,001 bytes 1,265,152 bytes 6.51 (Compressed) IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ 150385B87D98BF7984FE2C6FEA87DDBC
PAGER32C 0x00136000 729 bytes 1,024 bytes 4.54 (Normal) IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ A9EF29D3F4020231910625F4F4D008E0
TRANSIT 0x00137000 29 bytes 512 bytes 0.45 (Normal) IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ 863D89C1D654B0E7B28D0AE4F3635E62
PAGE 0x00138000 35,981 bytes 36,352 bytes 6.34 (Normal) IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ AB791910911D65BAF8F9EFD53A0F84AC
.rdata 0x00141000 172,917 bytes 173,056 bytes 5.46 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ AF0AEA8F63949BE3E58830EFF557A704
.data 0x0016c000 234,344 bytes 3,072 bytes 4.37 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE D40BF20D950B8B1CFAB8F29166059A71
.pdata 0x001a6000 45,048 bytes 45,056 bytes 6.10 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ B9E08D46277510BE22A2C6F97374978D
.rsrc 0x001b1000 22,192 bytes 22,528 bytes 3.61 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ 634E2224DD6D4099A8EC28149884910D
.reloc 0x001b7000 3,468 bytes 3,584 bytes 5.42 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ 3D6CB197C3D2EA96E05FFBA8BC2EBC46
Entropy Analysis Alert

1 section(s) with elevated entropy (≥6.5) - possible compression

Resource Analysis

▼
Total Resources: 5 (21,734 bytes)
Resource Type Count Total Size Percentage
MUI 1 216 bytes
1%
RT_RCDATA 1 4 bytes
0%
RT_MESSAGETABLE 1 6,432 bytes
29.6%
RT_VERSION 1 904 bytes
4.2%
RT_HTML 1 14,178 bytes
65.2%

Certificate Chain Analysis

▼
Certificate Information
Product Microsoft® Windows® Operating System
Description OS Loader
File Version 10.0.19041.5438 (WinBuild.160101.0800)
Original Name osloader.exe
Signing Date 06:03 PM 01/22/2025 (135 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: 2024-09-12 20:04:07 → 2025-09-11 20:04:07
Signature Algorithm: sha256RSA
Serial Number: 33 00 00 04 A8 82 E6 B8 AC 1C 5D 5F F0 00 00 00 00 04 A8
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: 2023-12-06 18:45:26 → 2025-03-05 18:45:26
Signature Algorithm: sha256RSA
Serial Number: 33 00 00 01 E9 0F 71 30 7E 5D F1 12 36 00 01 00 00 01 E9
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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