GridinSoft Threat Intelligence
default-browser-agent.exe threat report
GridinSoft Anti-Malware detection
Detected by GridinSoft before you download
The current ThreatInfo record shows this exact file hash detected as Possible Threat. 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
- Possible Threat
- Recommended action
- Scan and remove
- Last analysis
- 2026-05-08 23:01:21 (2 weeks ago)
- File hash
- 344c537a062d211a1955d8b34e86801a
Why it matters
Why GridinSoft flags this file
GridinSoft identifies the sample as Possible Threat.
First seen 2026-05-08 23:01:21 (2 weeks ago); latest analysis 2026-05-08 23:01:21 (2 weeks ago).
Company metadata: Mozilla Foundation. Product metadata: Waterfox.
Signed by BROWSERWORKS 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
- 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
default-browser-agent.exe is a Windows file recorded in the ThreatInfo database. It is associated with Waterfox. The reported company name is Mozilla Foundation. The current detection status is Possible Threat, based on the latest analysis from 2026-05-08 23:01:21 (2 weeks ago).
If default-browser-agent.exe 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 Possible Threat.
File Details
| Product Name: | Waterfox |
| Company Name: | Mozilla Foundation |
| MD5: | 344c537a062d211a1955d8b34e86801a |
| Size: | 32 KB |
| First Published: | 2026-05-08 23:01:21 (2 weeks ago) |
| Latest Published: | 2026-05-08 23:01:21 (2 weeks ago) |
| Status: | Possible Threat (on last analysis) | |
| Analysis Date: | 2026-05-08 23:01:21 (2 weeks 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: | BROWSERWORKS LTD |
| Status: | Valid |
The signature on default-browser-agent.exe 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% |
ThreatInfo has observed default-browser-agent.exe 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 default-browser-agent.exe across 1 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is Japan 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:
The most common operating system signal for default-browser-agent.exe 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
default-browser-agent.exe is identified as pe for 64-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.
32635519dc99b74c112b85f2a86430ab
aa924b4732c277a6ef3d1b0e6a16a7bb
1a3fb19fad29609e30bc312fd1afe6a7
7ee49d49824b0085734522fcf0e29d98
53a81f866b1b4ab2f2209d99ed8a62e7
ba23313a3b9b09cb76af49ba5413e290
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 Possible Threat
This report identifies default-browser-agent.exe by MD5 344c537a062d211a1955d8b34e86801a. If the same file is present on your device, scan the system and remove the detected object after confirming the hash and location.