GridinSoft Threat Intelligence

rundll32.exb file report

Under review File reputation report
MD5 3a6209ac494296c24c2065cb4392b5f4
Latest seen 2024-12-10 23:01:53 (a year ago)
First seen 2017-05-21 03:02:11 (9 years ago)
Size 50 KB
Publisher Microsoft Corporation
Product Microsoft® Windows® Operating System

Why it matters

Evidence available for this file

Detection

No final classification is available yet.

Timeline

First seen 2017-05-21 03:02:11 (9 years ago); latest analysis 2024-12-10 23:01:53 (a year ago).

Publisher context

Company metadata: Microsoft Corporation. Product metadata: Microsoft® Windows® Operating System.

Aliases

This hash has appeared under multiple file names, which can happen with repackaging, bundling, or deliberate renaming.

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. Use the hash and metadata below to verify the exact file identity.
  2. Review publisher, signature, paths, and PE details for inconsistencies.
  3. Run a local scan if the file appears unexpectedly or starts with Windows.

File context

rundll32.exb is a Windows file recorded in the ThreatInfo database. It is associated with Microsoft® Windows® Operating System. The reported company name is Microsoft Corporation. The current detection status is Undefined, based on the latest analysis from 2024-12-10 23:01:53 (a year ago).

ThreatInfo does not have a final classification for this file yet. Use the technical details below to compare the hash, size, signature, and observed locations with the copy found on your device.

File Details

Product Name: Microsoft® Windows® Operating System
Company Name: Microsoft Corporation
MD5: 3a6209ac494296c24c2065cb4392b5f4
Size: 50 KB
First Published: 2017-05-21 03:02:11 (9 years ago)
Latest Published: 2024-12-10 23:01:53 (a year ago)
Status: Undefined (on last analysis)
Analysis Date: 2024-12-10 23:01:53 (a year ago)

Common Places:

%windir%\system32
%sysdrive%\zv\noexp\files
%commonappdata%\net protector\nposfile\2017-03-01_1332\files
%system%

ThreatInfo has observed rundll32.exb 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.

File Names:

2 observed names
rundll32.exe rundll32.exb

This hash has been seen with multiple file names. Alternate names can appear when software is updated, copied between folders, packed by an installer, or deliberately renamed to avoid recognition. Compare the exact MD5 above before assuming two names refer to the same file.

Geographic signal

Observed country distribution

ThreatInfo has seen rundll32.exb across 47 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country Thailand
Share 14.2%
Low High activity

The strongest geographic signal for this file is Thailand with 14.2% of observed hits. Geographic distribution can help identify targeted campaigns, regional software bundles, or where a file is most commonly reported.

OS Version:

Windows 8 90.6%
Windows Server 2012 9.4%

The most common operating system signal for rundll32.exb is Windows 8 with 90.6% 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

rundll32.exb is identified as pe for 64-bit systems. The subsystem is Windows GUI. PE header values are useful for triage, especially when they do not match the expected publisher, product, or release timeline.

Format pe
Architecture 64-bit
Subsystem Windows GUI
Entry point 0x00003e14
Image base 0x0000000140000000

PE Sections:

Sections 7
Raw data 50688

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

.text 17408 bytes · 34.3% of section data
MD5 4161da3d5866353e1bc1d7c959455880
.data 512 bytes · 1.0% of section data
MD5 d2e118408beb90f34f783e61ebaecb66
.pdata 1024 bytes · 2.0% of section data
MD5 89d9e94ba59799132709b05c11701a67
.idata 4096 bytes · 8.1% of section data
MD5 f18915324e6c0eb03b6fd5b313a0a759
minATL 512 bytes · 1.0% of section data
Uncommon name
MD5 b58be67d49ec6cec7b97095a8fb20b11
.rsrc 26624 bytes · 52.5% of section data
MD5 e7c3a244b12c96084116fd043ea7c466
.reloc 512 bytes · 1.0% of section data
MD5 7dbc9b4ef1fb720fed2e4100e50eee3b

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 file is still under review

ThreatInfo has not assigned a final verdict yet. Compare the file hash, location, signature, and publisher before trusting the file on a production system.

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 3a6209ac494296c24c2065cb4392b5f4.
  • 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.