GridinSoft Threat Intelligence

RtkApi64U.dll file report

Under review File reputation report
MD5 1fbf7704fa1268b496c219daf50b052c
Latest seen 2021-03-31 20:54:15 (5 years ago)
First seen 2021-02-14 16:43:34 (5 years ago)
Size 835 KB
Publisher Realtek Semiconductor Corp.
Product Realtek APO API
Signed by Realtek Semiconductor Corp.;Microsoft Windows Hardware Compatibility Publisher

Why it matters

Evidence available for this file

Detection

No final classification is available yet.

Timeline

First seen 2021-02-14 16:43:34 (5 years ago); latest analysis 2021-03-31 20:54:15 (5 years ago).

Publisher context

Company metadata: Realtek Semiconductor Corp.. Product metadata: Realtek APO API.

Digital signature

Signed by Realtek Semiconductor Corp.;Microsoft Windows Hardware Compatibility Publisher. 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. 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

RtkApi64U.dll is a Windows file recorded in the ThreatInfo database. It is associated with Realtek APO API. The reported company name is Realtek Semiconductor Corp.. The current detection status is Undefined, based on the latest analysis from 2021-03-31 20:54:15 (5 years 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: Realtek APO API
Company Name: Realtek Semiconductor Corp.
MD5: 1fbf7704fa1268b496c219daf50b052c
Size: 835 KB
First Published: 2021-02-14 16:43:34 (5 years ago)
Latest Published: 2021-03-31 20:54:15 (5 years ago)
Status: Undefined (on last analysis)
Analysis Date: 2021-03-31 20:54:15 (5 years ago)

Overview

Signed By: Realtek Semiconductor Corp.;Microsoft Windows Hardware Compatibility Publisher
Status: Valid

The signature on RtkApi64U.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:

%commonappdata%\winzip\winzip driver updater\downloads\85
%commonappdata%\winzip\winzip driver updater\downloads\c219f4e4-1f18-4730-b8c7-8fb2b723a83e

ThreatInfo has observed RtkApi64U.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 RtkApi64U.dll across 1 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country United Kingdom
Share 100.0%
Low High activity

The strongest geographic signal for this file is United Kingdom with 100.0% of observed hits. Geographic distribution can help identify targeted campaigns, regional software bundles, or where a file is most commonly reported.

OS Version:

Windows 10 100.0%

The most common operating system signal for RtkApi64U.dll is Windows 10 with 100.0% 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

RtkApi64U.dll 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 0x0004e870
Image base 0x0000000180000000

PE Sections:

Sections 6
Raw data 826880

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

.text 408576 bytes · 49.4% of section data
MD5 70c2618bd6b227c4a9aa2c124d68678f
.rdata 212480 bytes · 25.7% of section data
MD5 136348d6566b453ef2b5389dae46619e
.data 34304 bytes · 4.1% of section data
MD5 15d084d6c4c85a11afea88c5a1317420
.pdata 27136 bytes · 3.3% of section data
MD5 646e4e38eb6e435eebec551bf29c9837
.rsrc 136192 bytes · 16.5% of section data
MD5 a511263cb376372e103146e9bf8f71df
.reloc 8192 bytes · 1.0% of section data
MD5 609e88724327ef9ba63b19652ed24922

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 1fbf7704fa1268b496c219daf50b052c.
  • 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.