GridinSoft Threat Intelligence

xul.dll threat report

Detected as Trojan.Heur! File reputation report
MD5 639ffd325d98ddaead09892d6813cbf5
Latest seen 2026-04-28 23:01:46 (2 weeks ago)
First seen 2026-04-28 23:01:46 (2 weeks ago)
Size 154 MB
Publisher Mozilla Foundation
Product Tor Browser

GridinSoft Anti-Malware detection

Detected by GridinSoft before you download

The current ThreatInfo record shows this exact file hash detected as Trojan.Heur!. 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.Heur!
Recommended action
Scan and remove
Last analysis
2026-04-28 23:01:46 (2 weeks ago)
File hash
639ffd325d98ddaead09892d6813cbf5
Download Anti-Malware

Why it matters

Why GridinSoft flags this file

Detection

GridinSoft identifies the sample as Trojan.Heur!.

Timeline

First seen 2026-04-28 23:01:46 (2 weeks ago); latest analysis 2026-04-28 23:01:46 (2 weeks ago).

Publisher context

Company metadata: Mozilla Foundation. Product metadata: Tor Browser.

Observed locations

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

  1. Compare the MD5 above with the file found on the device.
  2. Check whether the file appears in the observed locations or under one of the alternate names.
  3. Run GridinSoft Anti-Malware to confirm the detection and remove the file if it is present.

File context

xul.dll is a Windows file recorded in the ThreatInfo database. It is associated with Tor Browser. The reported company name is Mozilla Foundation. The current detection status is Trojan.Heur!, based on the latest analysis from 2026-04-28 23:01:46 (2 weeks ago).

If xul.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 Trojan.Heur!.

File Details

Product Name: Tor Browser
Company Name: Mozilla Foundation
MD5: 639ffd325d98ddaead09892d6813cbf5
Size: 154 MB
First Published: 2026-04-28 23:01:46 (2 weeks ago)
Latest Published: 2026-04-28 23:01:46 (2 weeks ago)
Status: Trojan.Heur! (on last analysis)
Analysis Date: 2026-04-28 23:01:46 (2 weeks ago)

Detection screenshot

xul.dll 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.

Common Places:

%desktop%\papeles\tor browser

ThreatInfo has observed xul.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 xul.dll across 1 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country France
Share 100.0%
Low High activity

The strongest geographic signal for this file is France 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:

Windows 10 100.0%

The most common operating system signal for xul.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

xul.dll 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.

Format pe
Architecture 64-bit
Subsystem Windows GUI
Entry point 0x000011e0
Image base 0x0000000180000000

PE Sections:

Sections 10
Raw data 162238464

Section layout highlights raw-size concentration, repeated names, packer markers, and hashes that can be compared across related samples.

.text 115358208 bytes · 71.1% of section data
Large raw data
MD5 fc0add422bc15bada1c3f9546de82208
.rdata 27247616 bytes · 16.8% of section data
Large raw data
MD5 36fc17135a50e30ab41a4e36945d47e2
.buildid 512 bytes · 0.0% of section data
Uncommon name
MD5 c33e519737c2731b6e6b14dea36b2175
.data 872960 bytes · 0.5% of section data
MD5 09e6dd09276ee30e6bbefd1b4d036d3d
.pdata 2743808 bytes · 1.7% of section data
MD5 d0970b8cb81c921fa270598a8718fc48
.rodata 15030784 bytes · 9.3% of section data
Large raw data
MD5 39451fcee16d2096a9469df2d084cf3f
.tls 1536 bytes · 0.0% of section data
MD5 2e91e85587456afc73442b170d85f1b3
mozbldid 512 bytes · 0.0% of section data
Uncommon name
MD5 d4097a1ceb018b1fc9715ab1ec968c2e
.rsrc 6144 bytes · 0.0% of section data
MD5 3d5b80cfb5d21f12a055d3189893c40a
.reloc 976384 bytes · 0.6% of section data
MD5 944fabffff7b9d77d44802fd33bd5488

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.Heur!

This report identifies xul.dll by MD5 639ffd325d98ddaead09892d6813cbf5. If the same file is present on your device, scan the system and remove the detected object after confirming the hash and location.

Download GridinSoft Anti-Malware Scan the device and confirm whether this exact hash is present. Check this hash on VirusTotal

Recommended next steps

  • Compare the local file MD5 with 639ffd325d98ddaead09892d6813cbf5.
  • Check the file path, publisher, and signature against the details in this report.
  • Run a GridinSoft scan and remove the object if the same hash is found.