GridinSoft Threat Intelligence
Esent.Interop.dll threat report
GridinSoft Anti-Malware detection
Detected by GridinSoft before you download
The current ThreatInfo record shows this exact file hash detected as PUP.WebCompanion. Download GridinSoft Anti-Malware to scan the device, confirm whether this file is present, and remove the detected object if it is found.
- Detection name
- PUP.WebCompanion
- Recommended action
- Scan and remove
- Last analysis
- 2026-02-27 23:00:48 (3 months ago)
- File hash
- f1d79a2d9a54715b6d3d8f6d7271f2e8
Why it matters
Why GridinSoft flags this file
GridinSoft identifies the sample as PUP.WebCompanion.
First seen 2022-08-18 23:34:09 (3 years ago); latest analysis 2026-02-27 23:00:48 (3 months ago).
Company metadata: Microsoft. Product metadata: EsentInterop.
Signed by Lavasoft Software Canada Inc.. 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
- Compare the MD5 above with the file found on the device.
- Check whether the file appears in the observed locations or under one of the alternate names.
- Run GridinSoft Anti-Malware to confirm the detection and remove the file if it is present.
File context
Esent.Interop.dll is a Windows file recorded in the ThreatInfo database. It is associated with EsentInterop. The reported company name is Microsoft. The current detection status is PUP.WebCompanion, based on the latest analysis from 2026-02-27 23:00:48 (3 months ago).
If Esent.Interop.dll appears on your computer unexpectedly, treat it as suspicious. Check its location, digital signature, and recent system changes before allowing it to run. A full anti-malware scan is recommended when this file is detected as PUP.WebCompanion.
File Details
| Product Name: | EsentInterop |
| Company Name: | Microsoft |
| MD5: | f1d79a2d9a54715b6d3d8f6d7271f2e8 |
| Size: | 393 KB |
| First Published: | 2022-08-18 23:34:09 (3 years ago) |
| Latest Published: | 2026-02-27 23:00:48 (3 months ago) |
| Status: | PUP.WebCompanion (on last analysis) | |
| Analysis Date: | 2026-02-27 23:00:48 (3 months ago) |
Detection screenshot
The screenshot is a visual record of a GridinSoft Anti-Malware detection for this sample. Use the hash and metadata above as the primary identifiers when comparing the file on your system.
Overview
| Signed By: | Lavasoft Software Canada Inc. |
| Status: | Valid |
The signature on Esent.Interop.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:
| %appdata%\lavasoft\web companion |
ThreatInfo has observed Esent.Interop.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:
3 observed countriesThe strongest geographic signal for this file is United Kingdom with 33.3% 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 Esent.Interop.dll 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
Esent.Interop.dll is identified as pe for 32-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.
PE Sections:
Section layout highlights raw-size concentration, repeated names, packer markers, and hashes that can be compared across related samples.
f127b3739763ebc2c16ad93c8f5d8afb
bcaf8702fbe5d26d24b3695fb832159a
e28026129e71d91c00e533245b6eaaab
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
GridinSoft detects this file as PUP.WebCompanion
This report identifies Esent.Interop.dll by MD5 f1d79a2d9a54715b6d3d8f6d7271f2e8. If the same file is present on your device, scan the system and remove the detected object after confirming the hash and location.