GridinSoft Threat Intelligence
libz-1.dll file report
Why it matters
Evidence available for this file
No final classification is available yet.
First seen 2017-05-28 10:05:28 (9 years ago); latest analysis 2025-05-09 23:00:48 (a year ago).
Product metadata: zlib.
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
libz-1.dll is a Windows file recorded in the ThreatInfo database. It is associated with zlib. The current detection status is Undefined, based on the latest analysis from 2025-05-09 23:00:48 (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: | zlib |
| MD5: | 84e1a44c19599bcd18ef5525c97ed2a6 |
| Size: | 106 KB |
| First Published: | 2017-05-28 10:05:28 (9 years ago) |
| Latest Published: | 2025-05-09 23:00:48 (a year ago) |
| Status: | Undefined (on last analysis) | |
| Analysis Date: | 2025-05-09 23:00:48 (a year ago) |
Common Places:
| %appdata%\system\libs |
| %sysdrive%\programdata |
| %commonappdata%\windows |
| %appdata%\microsoft\windows\themes |
| %appdata%\system |
| %appdata%\appdata |
| %appdata% |
| %commonappdata% |
| %appdata%\microsoft\windows |
| %sysdrive% |
ThreatInfo has observed libz-1.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 libz-1.dll across 52 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is Russian Federation with 70.5% 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 libz-1.dll is Windows 10 with 46.2% 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
libz-1.dll is identified as pe for 64-bit systems. The subsystem is Windows CUI. 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.
2bc3a413cd792e178fb0ac0767baa4b9
9a8c363d6def06b23a38971be44b629b
311b68e4a729a85202cfc0abe90fd63d
4611cbec95d5f814e3981d7a0acf358e
1cd8be12453348b9b52231bcc183d5ab
00000000000000000000000000000000
4ab09d2643698325d54831898fcf9009
cb9e960c215288192cd179fe3e1a870a
ba8348f1f7a16e3f3c20098215d05296
06987c369f14f0b60fe909d7ea7949c9
0ece938199f171547bfde81530680990
0aeb3150f03a21f09f3eca83c12efa9a
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.