GridinSoft Threat Intelligence

3aca9.rbf file report

Under review File reputation report
MD5 4c8a880eabc0b4d462cc4b2472116ea1
Latest seen 2025-04-09 23:00:21 (a year ago)
First seen 2017-05-21 05:04:06 (9 years ago)
Size 536 KB
Publisher Microsoft Corporation
Product Microsoft® Visual Studio® 2005

Why it matters

Evidence available for this file

Detection

No final classification is available yet.

Timeline

First seen 2017-05-21 05:04:06 (9 years ago); latest analysis 2025-04-09 23:00:21 (a year ago).

Publisher context

Company metadata: Microsoft Corporation. Product metadata: Microsoft® Visual Studio® 2005.

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

3aca9.rbf is a Windows file recorded in the ThreatInfo database. It is associated with Microsoft® Visual Studio® 2005. The reported company name is Microsoft Corporation. The current detection status is Undefined, based on the latest analysis from 2025-04-09 23:00:21 (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® Visual Studio® 2005
Company Name: Microsoft Corporation
MD5: 4c8a880eabc0b4d462cc4b2472116ea1
Size: 536 KB
First Published: 2017-05-21 05:04:06 (9 years ago)
Latest Published: 2025-04-09 23:00:21 (a year ago)
Status: Undefined (on last analysis)
Analysis Date: 2025-04-09 23:00:21 (a year ago)

Common Places:

%appdata%\tencent\nba2konline\e06c0423ab6175b049a676f3bc5a0a78\teniodl
%programfiles%\tencent\qzone
%appdata%\tencent\nba2konline\028a316b2676b2cd8998ceae5fc2dfe2\teniodl
%appdata%\tencent\nba2konline\2a6cfbb7eb5f941434935a2514fe5b7f\teniodl
%appdata%\tencent\tgp\teniodl
%programfiles%\kbasesrv
%appdata%\tencent\nba2konline\f9fe3dae0a42934c5c20fabe8b7b2ba8\teniodl
%programfiles%\tencent\qqplayer
%localappdata%\playfree browser\games\jewel_quest_2-gs_agh
%programfiles%\xigua\2.12.0.5

ThreatInfo has observed 3aca9.rbf 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
msvcp80.dll 3aca9.rbf

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 3aca9.rbf across 53 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country Taiwan
Share 32.0%
Low High activity

The strongest geographic signal for this file is Taiwan with 32.0% 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 58.3%
Windows 7 29.2%
Windows XP 5.1%
Windows 8.1 4.4%
Windows 8 0.7%
Windows Server 2008 R2 0.7%
Windows Server 2012 R2 0.7%
Windows Server 2003 0.6%
Windows Vista 0.2%
Windows Server 2012 0.1%

The most common operating system signal for 3aca9.rbf is Windows 10 with 58.3% 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

3aca9.rbf is identified as pe for 32-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 32-bit
Subsystem Windows GUI
Entry point 0x00030b1e
Image base 0x7c420000

PE Sections:

Sections 5
Raw data 544768

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

.text 212992 bytes · 39.1% of section data
MD5 a6809147e06be08ad8026fabed97d688
.rdata 299008 bytes · 54.9% of section data
MD5 f47b2c43fda96615c9e75f2f9bd37a1b
.data 8192 bytes · 1.5% of section data
MD5 813ddc77dd38981099fe8cc9749cde31
.rsrc 4096 bytes · 0.8% of section data
MD5 3929ae18372d69eb5c97db0283e0126b
.reloc 20480 bytes · 3.8% of section data
MD5 508ad4d5b794ac060152e7dbd8329e6b

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 4c8a880eabc0b4d462cc4b2472116ea1.
  • 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.