GridinSoft Threat Intelligence
bz2.dll threat report
GridinSoft Anti-Malware detection
Detected by GridinSoft before you download
The current ThreatInfo record shows this exact file hash detected as PUP.Avanquest. 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
- PUP.Avanquest
- Recommended action
- Scan and remove
- Last analysis
- 2026-03-28 23:00:46 (2 months ago)
- File hash
- 4aaffa73572545d26280118fd97e32b9
Why it matters
Why GridinSoft flags this file
GridinSoft identifies the sample as PUP.Avanquest, part of the PUP threat category.
Potentially unwanted programs, bundlers, installers, and utilities with intrusive behavior. Related PUP reports help compare this file with nearby detections, publishers, and hashes.
First seen 2026-01-05 23:06:05 (4 months ago); latest analysis 2026-03-28 23:00:46 (2 months ago).
Signed by PC Helpsoft (7270356 Canada Inc). 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 PUP category for related samples and common context.
File context
bz2.dll is a Windows file recorded in the ThreatInfo database. The current detection status is PUP.Avanquest, based on the latest analysis from 2026-03-28 23:00:46 (2 months ago). ThreatInfo groups this verdict with PUP reports for broader family-level investigation.
If bz2.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 PUP.Avanquest.
File Details
| MD5: | 4aaffa73572545d26280118fd97e32b9 |
| Size: | 87 KB |
| First Published: | 2026-01-05 23:06:05 (4 months ago) |
| Latest Published: | 2026-03-28 23:00:46 (2 months ago) |
| Status: | PUP.Avanquest (on last analysis) | |
| Analysis Date: | 2026-03-28 23:00:46 (2 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: | PC Helpsoft (7270356 Canada Inc) |
| Status: | Valid |
The signature on bz2.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:
| %programfiles%\avanquest\driver updater\application |
ThreatInfo has observed bz2.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 bz2.dll across 6 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is United States with 28.6% of observed hits. Geographic distribution can help identify targeted campaigns, regional software bundles, or where a file is most commonly reported.
OS Version:
The most common operating system signal for bz2.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
bz2.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.
PE Sections:
Section layout highlights raw-size concentration, repeated names, packer markers, and hashes that can be compared across related samples.
49f6213c184df469c2139d8125e50f3c
8e910200681d5b4addfc7f3b1400f120
77950db14c05632c7a0eda1f4733e9a1
9ff2b1bd8aeabcfb85afa843e3e75579
78d0036bbbce65544d7512899f94dd04
e519d6b4523c2a761b25e9a821c0d48b
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 PUP.Avanquest
This report identifies bz2.dll by MD5 4aaffa73572545d26280118fd97e32b9. It is part of the PUP 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.