nss3.dll threat report
ThreatInfo file report
nss3.dll
GridinSoft Anti-Malware detection
Detected by GridinSoft before you download
The current ThreatInfo record shows this exact file hash detected as Adware.Agent (Heuristic). 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
- Adware.Agent (Heuristic)
- Recommended action
- Scan and remove
- Last analysis
- 2025-12-03 23:03:33 (5 months ago)
- File hash
- d7858e8449004e21b01d468e9fd04b82
Why it matters
Why GridinSoft flags this file
GridinSoft identifies the sample as Adware.Agent (Heuristic).
First seen 2020-07-31 03:51:30 (5 years ago); latest analysis 2025-12-03 23:03:33 (5 months ago).
Company metadata: Mozilla Foundation. Product metadata: Thunderbird.
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.
File context
nss3.dll is a Windows file recorded in the ThreatInfo database. It is associated with Thunderbird. The reported company name is Mozilla Foundation. The current detection status is Adware.Agent (Heuristic), based on the latest analysis from 2025-12-03 23:03:33 (5 months ago).
If nss3.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 Adware.Agent (Heuristic).
File Details
| Product Name: | Thunderbird |
| Company Name: | Mozilla Foundation |
| MD5: | d7858e8449004e21b01d468e9fd04b82 |
| Size: | 1 MB |
| First Published: | 2020-07-31 03:51:30 (5 years ago) |
| Latest Published: | 2025-12-03 23:03:33 (5 months ago) |
| Status: | Adware.Agent (Heuristic) (on last analysis) | |
| Analysis Date: | 2025-12-03 23:03:33 (5 months 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 nss3.dll 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:
| %commonappdata% |
| %commonappdata% |
| %commonappdata% |
| %commonappdata% |
| %commonappdata% |
| %commonappdata% |
| %commonappdata% |
| %commonappdata% |
| %commonappdata% |
| %commonappdata% |
ThreatInfo has observed nss3.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:
| 17.1% | ||
| 14.7% | ||
| 3.7% | ||
| 3.5% | ||
| 3.1% | ||
| 2.9% | ||
| 2.0% | ||
| 1.8% | ||
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The strongest geographic signal for this file is Indonesia with 17.1% 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 | 68.2% | |
| Windows 7 | 24.9% | |
| Windows 8.1 | 4.5% | |
| Windows 8 | 1.1% | |
| Windows Vista | 0.6% | |
| Windows Server 2012 R2 | 0.4% | |
| Windows Server 2016 | 0.2% | |
| Windows Server 2008 R2 | 0.2% |
The most common operating system signal for nss3.dll is Windows 10 with 68.2% 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
nss3.dll is identified as pe for 32 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.
| Subsystem: | Windows GUI |
| PE Type: | pe |
| OS Bitness: | 32 |
| Image Base: | 0x10000000 |
| Entry Address: | 0x000ef077 |
PE Sections:
| Name | Size of data | MD5 |
| .text | 977408 | fa34fd0f645fb8622ec9c9dbd4efab33 |
| .rdata | 218112 | b847062cd1d3783f5c01d10d65db37ba |
| .data | 8704 | cc4d8709b7f08a1580f6691d61facc1a |
| .rsrc | 1024 | 5727f70b88e595c786c4bb850975ee93 |
| .reloc | 32256 | f68c8a2cd43a76d2fdf784315d63c743 |
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.
More information:
