GridinSoft Threat Intelligence

zlib1.dl1 file report

Under review File reputation report
MD5 cb0577e362e193cad14c3d23c40c30d4
Latest seen 2025-05-26 23:01:25 (a year ago)
First seen 2017-09-18 08:02:50 (8 years ago)
Size 113 KB
Product zlib

Why it matters

Evidence available for this file

Detection

No final classification is available yet.

Timeline

First seen 2017-09-18 08:02:50 (8 years ago); latest analysis 2025-05-26 23:01:25 (a year ago).

Publisher context

Product metadata: zlib.

Aliases

This hash has appeared under multiple file names, which can happen with repackaging, bundling, or deliberate renaming.

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

zlib1.dl1 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 2025-05-26 23:01:25 (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: cb0577e362e193cad14c3d23c40c30d4
Size: 113 KB
First Published: 2017-09-18 08:02:50 (8 years ago)
Latest Published: 2025-05-26 23:01:25 (a year ago)
Status: Undefined (on last analysis)
Analysis Date: 2025-05-26 23:01:25 (a year ago)

Common Places:

%windir%\fonts
%windir%
%temp%
%appdata%\electroneum
%sysdrive%\docume~1\bagian~1\locals~1\temp
%sysdrive%\appdata\local\temp
%appdata%
%sysdrive%\docume~1\admini~1\locals~1\temp
%sysdrive%\docume~1\master~1\locals~1\temp
%sysdrive%\docume~1\admin\locals~1\temp

ThreatInfo has observed zlib1.dl1 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.

File Names:

2 observed names
zlib1.dll zlib1.dl1

This hash has been seen with multiple file names. Alternate names can appear when software is updated, copied between folders, packed by an installer, or deliberately renamed to avoid recognition. Compare the exact MD5 above before assuming two names refer to the same file.

Geographic signal

Observed country distribution

ThreatInfo has seen zlib1.dl1 across 36 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country Taiwan
Share 49.1%
Low High activity

The strongest geographic signal for this file is Taiwan with 49.1% 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 63.9%
Windows 7 25.4%
Windows Server 2008 R2 5.8%
Windows Server 2012 R2 2.1%
Windows XP 1.8%
Windows 8.1 0.9%

The most common operating system signal for zlib1.dl1 is Windows 10 with 63.9% 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.dl1 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.

Format pe
Architecture 64-bit
Subsystem Windows CUI
Entry point 0x000013e0
Image base 0x0000000062e80000

PE Sections:

Sections 12
Raw data 115200

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

.text 82432 bytes · 71.6% of section data
MD5 4050e74e37ca89d2eae934df8e94de29
.data 512 bytes · 0.4% of section data
MD5 398dd74ccc586b8df9141d5fa13c8efb
.rdata 21504 bytes · 18.7% of section data
MD5 5ea7f35187568c739609d765fea002cd
.pdata 2048 bytes · 1.8% of section data
MD5 0eaab62d5034340ba9e3bbf76d1d3714
.xdata 2048 bytes · 1.8% of section data
Uncommon name
MD5 2cc5ccef0c66faf4ce88a24bce71b8c1
.bss 0 bytes · 0.0% of section data
MD5 00000000000000000000000000000000
.edata 2048 bytes · 1.8% of section data
MD5 3e26f6538c9c0d74288a1d56e39f6d59
.idata 2048 bytes · 1.8% of section data
MD5 36f789b801fade124643bcf935099808
.CRT 512 bytes · 0.4% of section data
MD5 b0817a17b10ecd3b4b1016e41948e596
.tls 512 bytes · 0.4% of section data
MD5 03e9b83bf584522206030930d92ab81d
.rsrc 1024 bytes · 0.9% of section data
MD5 8408e0e2e09581b4ae4ef4da130f10a0
.reloc 512 bytes · 0.4% of section data
MD5 3775127ac7b075be5b5a41b20247ad08

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 cb0577e362e193cad14c3d23c40c30d4.
  • 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.