GridinSoft Threat Intelligence

xul.dll threat report

Detected as Trojan.Heur! File reputation report
MD5 b3021d56ca89a3df36ef31a5a54b07fa
Latest seen 2026-05-15 17:00:34 (14 hours ago)
First seen 2026-04-08 23:01:06 (a month 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
2026-05-15 17:00:34 (14 hours ago)
File hash
b3021d56ca89a3df36ef31a5a54b07fa
Download Anti-Malware

Why it matters

Why GridinSoft flags this file

Detection

GridinSoft identifies the sample as Trojan.Heur!.

Timeline

First seen 2026-04-08 23:01:06 (a month ago); latest analysis 2026-05-15 17:00:34 (14 hours 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 2026-05-15 17:00:34 (14 hours 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: b3021d56ca89a3df36ef31a5a54b07fa
Size: 154 MB
First Published: 2026-04-08 23:01:06 (a month ago)
Latest Published: 2026-05-15 17:00:34 (14 hours ago)
Status: Trojan.Heur! (on last analysis)
Analysis Date: 2026-05-15 17:00:34 (14 hours 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:

%sysdrive%\tor browser
%desktop%\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 2 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country Spain
Share 50.0%
Low High activity

The strongest geographic signal for this file is Spain with 50.0% 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 162126848

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

.text 115264000 bytes · 71.1% of section data
Large raw data
MD5 f2e414ecd9f423fe115a64bfe6a4ca7d
.rdata 27233280 bytes · 16.8% of section data
Large raw data
MD5 a90ffafef8595663d73aa1c61a000ad4
.buildid 512 bytes · 0.0% of section data
Uncommon name
MD5 3bc7bc950ce5731f63dbf4416b89e3bf
.data 872960 bytes · 0.5% of section data
MD5 082cad703a41dc22e345bfa256817b9a
.pdata 2741248 bytes · 1.7% of section data
MD5 2ffcfb374207ac0af478e8cc0e9414dd
.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 8822d17c2b3e702b0676b35d003e7150
.rsrc 6144 bytes · 0.0% of section data
MD5 3a516a0b3f4adc296164bb11fc90d5a4
.reloc 975872 bytes · 0.6% of section data
MD5 fc5ff3aea4dc63b8e5a77c9933ed3f3e

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 b3021d56ca89a3df36ef31a5a54b07fa. 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 b3021d56ca89a3df36ef31a5a54b07fa.
  • 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.