GridinSoft Threat Intelligence
TVALZ_O.SYS file report
Why it matters
Evidence available for this file
No final classification is available yet.
First seen 2021-03-27 21:59:21 (5 years ago); latest analysis 2021-03-27 21:59:21 (5 years ago).
Company metadata: Dynabook Inc..
Signed by Dynabook Inc.;Microsoft Windows Hardware Compatibility Publisher. The signature is reported as valid, but signed files can still be bundled or abused.
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
- Use the hash and metadata below to verify the exact file identity.
- Review publisher, signature, paths, and PE details for inconsistencies.
- Run a local scan if the file appears unexpectedly or starts with Windows.
File context
TVALZ_O.SYS is a Windows file recorded in the ThreatInfo database. The reported company name is Dynabook Inc.. The current detection status is Undefined, based on the latest analysis from 2021-03-27 21:59:21 (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
| Company Name: | Dynabook Inc. |
| MD5: | 63808e0c1e55c08acfb3873c6e3915bf |
| Size: | 44 KB |
| First Published: | 2021-03-27 21:59:21 (5 years ago) |
| Latest Published: | 2021-03-27 21:59:21 (5 years ago) |
| Status: | Undefined (on last analysis) | |
| Analysis Date: | 2021-03-27 21:59:21 (5 years ago) |
Overview
| Signed By: | Dynabook Inc.;Microsoft Windows Hardware Compatibility Publisher |
| Status: | Valid |
The signature on TVALZ_O.SYS 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\107 |
ThreatInfo has observed TVALZ_O.SYS 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 TVALZ_O.SYS across 1 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is United States 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:
The most common operating system signal for TVALZ_O.SYS 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
TVALZ_O.SYS is identified as pe for 64-bit systems. The subsystem is Native. PE header values are useful for triage, especially when they do not match the expected publisher, product, or release timeline.
PE Sections:
Section layout highlights raw-size concentration, repeated names, packer markers, and hashes that can be compared across related samples.
6717b222e04f4852be44063790188919
171c3ff7f3bb07bf9e2c7d4cbbaaa592
ee8e428290ec42160c5e2a30f80215a5
d0b4a6991b44cbef8ae38547b6500c29
bbcd1ea2dfca138916aa9cdba8dc6d42
6577d0329d09face6980a976a6c55ee7
9c4f8a6b05597b67fa81ca2790ad0d68
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.