GridinSoft Threat Intelligence
download_engine.dll file report
Why it matters
Evidence available for this file
No final classification is available yet.
First seen 2017-05-21 09:01:49 (9 years ago); latest analysis 2025-11-28 23:00:26 (6 months ago).
Company metadata: Thunder Networking Technologies,LTD. Product metadata: Thunder.
Signed by ShenZhen Thunder Networking Technologies 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
download_engine.dll is a Windows file recorded in the ThreatInfo database. It is associated with Thunder. The reported company name is Thunder Networking Technologies,LTD. The current detection status is Undefined, based on the latest analysis from 2025-11-28 23:00:26 (6 months 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: | Thunder |
| Company Name: | Thunder Networking Technologies,LTD |
| MD5: | e164d5cc3d566708caf1aa2c0e842347 |
| Size: | 3 MB |
| First Published: | 2017-05-21 09:01:49 (9 years ago) |
| Latest Published: | 2025-11-28 23:00:26 (6 months ago) |
| Status: | Undefined (on last analysis) | |
| Analysis Date: | 2025-11-28 23:00:26 (6 months ago) |
Overview
| Signed By: | ShenZhen Thunder Networking Technologies Ltd. |
| Status: | Valid |
The signature on download_engine.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:
| %localappdata%\ucbrowser\user data\thunder\1.0.0.0\download |
| %localappdata%\ucbrowser\user data_i18n\thunder\1.0.0.0\download |
| %programfiles%\ucbrowser\application\downloader\download |
| %programfiles%\ucbrowser\application\new\new_downloader\download |
| %programfiles%\ucbrowser\application\5.6.11651.1013\update\0\remote\0_beta_package\downloader\download |
| %programfiles%\ucbrowser\application\5.0.1104.0\update\0\remote\0_beta_package\downloader\download |
| %profile%\dministrator\local settings\application data\xldl\download |
| %profile%\dministrator\local settings\application data\ucbrowser\user data\thunder\1.0.0.0\download |
| %appdata%\kpdown\download |
| %profile%\dministrador\configuración local\datos de programa\ucbrowser\user data_i18n\thunder\1.0.0.0\download |
ThreatInfo has observed download_engine.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 download_engine.dll across 89 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is Indonesia with 15.0% 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 download_engine.dll is Windows 7 with 43.9% 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
download_engine.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.
117db870199c57f4f9b2e0f545601dbc
1cb4325a94c03d255214ffe29107704c
7488f217261d83a5fae6ac306a6dacd2
9f0dcb606ec659c0d3743b6971347294
fdcbc439681781d9598f6d122440e533
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.