GridinSoft Threat Intelligence
zlib1.dll file report
Why it matters
Evidence available for this file
No final classification is available yet.
First seen 2017-08-01 15:06:10 (8 years ago); latest analysis 2024-05-05 23:00:46 (2 years ago).
Product metadata: ZLib.DLL.
Signed by Guangzhou Tieren Network Technology Co.,Ltd. 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
zlib1.dll is a Windows file recorded in the ThreatInfo database. It is associated with ZLib.DLL. The current detection status is Undefined, based on the latest analysis from 2024-05-05 23:00:46 (2 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: | ZLib.DLL |
| MD5: | 0025a0d6d3fe36ec278791536432a790 |
| Size: | 187 KB |
| First Published: | 2017-08-01 15:06:10 (8 years ago) |
| Latest Published: | 2024-05-05 23:00:46 (2 years ago) |
| Status: | Undefined (on last analysis) | |
| Analysis Date: | 2024-05-05 23:00:46 (2 years ago) |
Overview
| Signed By: | Guangzhou Tieren Network Technology Co.,Ltd |
| Status: | Valid |
The signature on zlib1.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:
| %appdata%\ytmediacenter |
| %localappdata%\ucbrowser\user data\pphelper\0.0.3 |
| %localappdata%\ucbrowser\user data\pphelper |
| %appdata% |
| %system%\config\systemprofile\appdata\roaming |
ThreatInfo has observed zlib1.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 zlib1.dll across 16 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is Taiwan with 30.5% 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 zlib1.dll is Windows 10 with 59.3% 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
zlib1.dll 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.
PE Sections:
Section layout highlights raw-size concentration, repeated names, packer markers, and hashes that can be compared across related samples.
b7b74985dbaa6a9d29084fbd2d0d7a04
a2cb2732a6c9da186feeca534bf0c573
7871db1432dacec1dcf5fd9a504a56a1
ffa9bf346453dc6ee58f7319b53dad6d
7143043c1f8dc0a9e05701b5e3294d57
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.