GridinSoft Threat Intelligence
CORE_RL_zlib_.dll file report
Why it matters
Evidence available for this file
No final classification is available yet.
First seen 2017-05-22 11:25:40 (9 years ago); latest analysis 2023-12-20 23:58:52 (2 years ago).
Company metadata: Jean-loup Gailly and Mark Adler. Product metadata: zlib data compression library.
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
CORE_RL_zlib_.dll is a Windows file recorded in the ThreatInfo database. It is associated with zlib data compression library. The reported company name is Jean-loup Gailly and Mark Adler. The current detection status is Undefined, based on the latest analysis from 2023-12-20 23:58:52 (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 data compression library |
| Company Name: | Jean-loup Gailly and Mark Adler |
| MD5: | faf113aca7c9427edbeb2bdf19a96035 |
| Size: | 67 KB |
| First Published: | 2017-05-22 11:25:40 (9 years ago) |
| Latest Published: | 2023-12-20 23:58:52 (2 years ago) |
| Status: | Undefined (on last analysis) | |
| Analysis Date: | 2023-12-20 23:58:52 (2 years ago) |
Common Places:
| %localappdata%\compuclever\ultra file opener |
| %localappdata%\compuclever |
ThreatInfo has observed CORE_RL_zlib_.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 CORE_RL_zlib_.dll across 13 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 29.6% 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 CORE_RL_zlib_.dll is Windows 10 with 66.7% 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
CORE_RL_zlib_.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.
3ec3b09b3f9027033b0d4bf51f32af16
5c917ffb87062261ae5ef2efb8a79085
d7d6044868f6341746a576ac9c05b9c3
61e4c482b7a5699edb0c04ad40b702ef
b91427d4818058b976d3db90e29a33c0
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.