GridinSoft Threat Intelligence

xul.dll threat report

Detected as Trojan.Heur! File reputation report
MD5 fb6bf76dda3ec9bc7ba02552a2ed2432
Latest seen 2026-03-02 23:00:50 (2 months ago)
First seen 2026-03-02 23:00:50 (2 months ago)
Size 147 MB
Publisher Mozilla Foundation
Product Waterfox

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
2026-03-02 23:00:50 (2 months ago)
File hash
fb6bf76dda3ec9bc7ba02552a2ed2432
Download Anti-Malware

Why it matters

Why GridinSoft flags this file

Detection

GridinSoft identifies the sample as Trojan.Heur!.

Timeline

First seen 2026-03-02 23:00:50 (2 months ago); latest analysis 2026-03-02 23:00:50 (2 months ago).

Publisher context

Company metadata: Mozilla Foundation. Product metadata: Waterfox.

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 Waterfox. The reported company name is Mozilla Foundation. The current detection status is Trojan.Heur!, based on the latest analysis from 2026-03-02 23:00:50 (2 months 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: Waterfox
Company Name: Mozilla Foundation
MD5: fb6bf76dda3ec9bc7ba02552a2ed2432
Size: 147 MB
First Published: 2026-03-02 23:00:50 (2 months ago)
Latest Published: 2026-03-02 23:00:50 (2 months ago)
Status: Trojan.Heur! (on last analysis)
Analysis Date: 2026-03-02 23:00:50 (2 months 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:

%programfiles%

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.

Geography:

1 observed countries
100.0%

The strongest geographic signal for this file is Egypt 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 0x02200ad0
Image base 0x0000000180000000

PE Sections:

Sections 9
Raw data 154457600

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

.text 112323072 bytes · 72.7% of section data
Large raw data
MD5 2b32b4225c29774477e742b17911e175
.rdata 22440448 bytes · 14.5% of section data
Large raw data
MD5 76de7618ffd146cd3f138c8b4eefb832
.data 1074688 bytes · 0.7% of section data
MD5 b696d29295888c7760f525e602f9b4c5
.pdata 2694656 bytes · 1.7% of section data
MD5 43ad769af84ae8e5f6de1e3c4d12ab19
.rodata 15030784 bytes · 9.7% of section data
Large raw data
MD5 39451fcee16d2096a9469df2d084cf3f
.tls 2560 bytes · 0.0% of section data
MD5 74bc41673e5ff1733cb7fe865cc3da43
mozbldid 512 bytes · 0.0% of section data
Uncommon name
MD5 87405a9331349cce8d2df5a61d941222
.rsrc 6144 bytes · 0.0% of section data
MD5 35d21f4b218a1a4e463516eb8d93293b
.reloc 884736 bytes · 0.6% of section data
MD5 977aa3ec6f594b9fc303f2e663d20308

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 fb6bf76dda3ec9bc7ba02552a2ed2432. 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 fb6bf76dda3ec9bc7ba02552a2ed2432.
  • 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.