GridinSoft Threat Intelligence

inst.ep file report

Under review File reputation report
MD5 4f1c1e0c172999ffe838a20f5997709f
Latest seen 2025-04-05 23:01:59 (a year ago)
First seen 2025-04-05 23:01:59 (a year ago)
Size 3 MB
Publisher Shanghai Hudun Information Technology Co., Ltd
Product WorkinToolFileCompressor
Signed by Shanghai Hudun Information Technology Co., Ltd.

Why it matters

Evidence available for this file

Detection

No final classification is available yet.

Timeline

First seen 2025-04-05 23:01:59 (a year ago); latest analysis 2025-04-05 23:01:59 (a year ago).

Publisher context

Company metadata: Shanghai Hudun Information Technology Co., Ltd. Product metadata: WorkinToolFileCompressor.

Digital signature

Signed by Shanghai Hudun Information Technology Co., Ltd.. The signature is reported as valid, but signed files can still be bundled or abused.

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

inst.ep is a Windows file recorded in the ThreatInfo database. It is associated with WorkinToolFileCompressor. The reported company name is Shanghai Hudun Information Technology Co., Ltd. The current detection status is Undefined, based on the latest analysis from 2025-04-05 23:01:59 (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: WorkinToolFileCompressor
Company Name: Shanghai Hudun Information Technology Co., Ltd
MD5: 4f1c1e0c172999ffe838a20f5997709f
Size: 3 MB
First Published: 2025-04-05 23:01:59 (a year ago)
Latest Published: 2025-04-05 23:01:59 (a year ago)
Status: Undefined (on last analysis)
Analysis Date: 2025-04-05 23:01:59 (a year ago)

Overview

Signed By: Shanghai Hudun Information Technology Co., Ltd.
Status: Valid

The signature on inst.ep 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%\hudun

ThreatInfo has observed inst.ep 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 inst.ep across 1 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country United States
Share 100.0%
Low High activity

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:

Windows 10 100.0%

The most common operating system signal for inst.ep 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

inst.ep 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.

Format pe
Architecture 32-bit
Subsystem Windows GUI
Entry point 0x000dd245
Image base 0x00400000

PE Sections:

Sections 8
Raw data 3162112

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

.text 1211392 bytes · 38.3% of section data
MD5 605d572e984e2e102088a89847853b35
.rdata 266240 bytes · 8.4% of section data
MD5 47771c812dea095221640b41cfe25ede
.data 17920 bytes · 0.6% of section data
MD5 9348dd210385d734ee1440fd188175ba
.gfids 4096 bytes · 0.1% of section data
Uncommon name
MD5 59ee0c2f53f39d0954718508bff480dd
.tls 512 bytes · 0.0% of section data
MD5 1f354d76203061bfdd5a53dae48d5435
_RDATA 512 bytes · 0.0% of section data
Uncommon name
MD5 a713a886e740eebbf93d8e0fe58b9918
.rsrc 1601024 bytes · 50.6% of section data
MD5 598523f564b36ac0f762d16288094d4d
.reloc 60416 bytes · 1.9% of section data
MD5 05feed24959748b8dace022f754f7975

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 4f1c1e0c172999ffe838a20f5997709f.
  • 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.