backup_u.dll file report
ThreatInfo file report
backup_u.dll
Why it matters
Evidence available for this file
No final classification is available yet.
First seen 2020-11-12 20:09:46 (5 years ago); latest analysis 2026-05-02 23:01:44 (3 days ago).
Product metadata: BCB/Delphi UnZip.
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
backup_u.dll is a Windows file recorded in the ThreatInfo database. It is associated with BCB/Delphi UnZip. The current detection status is Undefined, based on the latest analysis from 2026-05-02 23:01:44 (3 days 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: | BCB/Delphi UnZip |
| MD5: | 3140d890d011cb6b766662333b61799d |
| Size: | 55 KB |
| First Published: | 2020-11-12 20:09:46 (5 years ago) |
| Latest Published: | 2026-05-02 23:01:44 (3 days ago) |
| Status: | Undefined (on last analysis) | |
| Analysis Date: | 2026-05-02 23:01:44 (3 days ago) |
Common Places:
| %programfiles% |
| %programfiles% |
| %programfiles% |
| %programfiles% |
| %programfiles% |
| %programfiles% |
| %programfiles% |
| %programfiles% |
| %programfiles% |
| %programfiles% |
ThreatInfo has observed backup_u.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.
Geography:
| 18.2% | ||
| 9.1% | ||
| 9.1% | ||
| 9.1% | ||
| 5.5% | ||
| 3.6% | ||
| 3.6% | ||
| 3.6% | ||
| 3.6% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% | ||
| 1.8% |
The strongest geographic signal for this file is Netherlands with 18.2% 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 | 74.5% | |
| Windows 7 | 23.6% | |
| Windows 8 | 1.8% |
The most common operating system signal for backup_u.dll is Windows 10 with 74.5% 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
backup_u.dll is identified as pe for 32 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.
| Subsystem: | Windows GUI |
| PE Type: | pe |
| OS Bitness: | 32 |
| Image Base: | 0x00400000 |
| Entry Address: | 0x00025d70 |
PE Sections:
| Name | Size of data | MD5 |
| UPX0 | 0 | d41d8cd98f00b204e9800998ecf8427e |
| UPX1 | 53248 | 1166218dff991cb9ea57391cc88533bd |
| .rsrc | 2048 | 3531b793771b7045a2d9409de23e7171 |
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.
More information:
