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 Trojan.Sabsik. 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
- Trojan.Sabsik
- Recommended action
- Scan and remove
- Last analysis
- 2021-11-05 21:10:34 (4 years ago)
- File hash
- f5a77424da760aaa1420422e021ea45d
Why it matters
Why GridinSoft flags this file
GridinSoft identifies the sample as Trojan.Sabsik, part of the Trojan threat category.
Malware disguised as legitimate software or delivered through deceptive packaging. Related Trojan reports help compare this file with nearby detections, publishers, and hashes.
First seen 2021-11-05 21:10:34 (4 years ago); latest analysis 2021-11-05 21:10:34 (4 years ago).
Company metadata: Mozilla Foundation. Product metadata: Firefox Nightly.
Signed by Mozilla Corporation. 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. Review the Trojan category for related samples and common context.
File context
default-browser-agent.exe is a Windows file recorded in the ThreatInfo database. It is associated with Firefox Nightly. The reported company name is Mozilla Foundation. The current detection status is Trojan.Sabsik, based on the latest analysis from 2021-11-05 21:10:34 (4 years ago). ThreatInfo groups this verdict with Trojan reports for broader family-level investigation.
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 Trojan.Sabsik.
File Details
| Product Name: | Firefox Nightly |
| Company Name: | Mozilla Foundation |
| MD5: | f5a77424da760aaa1420422e021ea45d |
| Size: | 667 KB |
| First Published: | 2021-11-05 21:10:34 (4 years ago) |
| Latest Published: | 2021-11-05 21:10:34 (4 years ago) |
| Status: | Trojan.Sabsik (on last analysis) | |
| Analysis Date: | 2021-11-05 21:10:34 (4 years 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: | Mozilla Corporation |
| 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:
| %appdata%\hvytube\.local-firefox\win64-95.0a1 |
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.
OS Version:
The most common operating system signal for default-browser-agent.exe is Windows 7 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.
317fb32e6499ca8734b28e73242c61eb
e984b7005e88b8c6eb7f5b19d54ffc93
200433f8f911a41ad35d48d6f7f8ba58
aed2c7f51fda88407cb6d8266a409437
b200bbfdf16b0a1f37fea27081b25696
1f354d76203061bfdd5a53dae48d5435
4331136f95b718471e99ae2df6572c81
50f3f01bcb45fe5890615ab9e237473e
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 Trojan.Sabsik
This report identifies default-browser-agent.exe by MD5 f5a77424da760aaa1420422e021ea45d. It is part of the Trojan report group. If the same file is present on your device, scan the system and remove the detected object after confirming the hash and location.