GridinSoft Threat Intelligence
Plugin_OptimizerEx.dll file report
Why it matters
Evidence available for this file
No final classification is available yet.
First seen 2017-05-21 09:02:28 (9 years ago); latest analysis 2023-11-09 23:27:27 (2 years ago).
Company metadata: Baidu, Inc.. Product metadata: Baidu PC Faster.
Signed by Baidu Online Network Technology (Beijing) Co.,Ltd.. 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
- Use the hash and metadata below to verify the exact file identity.
- Review publisher, signature, paths, and PE details for inconsistencies.
- Run a local scan if the file appears unexpectedly or starts with Windows.
File context
Plugin_OptimizerEx.dll is a Windows file recorded in the ThreatInfo database. It is associated with Baidu PC Faster. The reported company name is Baidu, Inc.. The current detection status is Undefined, based on the latest analysis from 2023-11-09 23:27:27 (2 years ago).
ThreatInfo does not have a final classification for this file yet. Use the technical details below to compare the hash, size, signature, and observed locations with the copy found on your device.
File Details
| Product Name: | Baidu PC Faster |
| Company Name: | Baidu, Inc. |
| MD5: | 5300fb9809a32aaf7ef16b61df7e05be |
| Size: | 1 MB |
| First Published: | 2017-05-21 09:02:28 (9 years ago) |
| Latest Published: | 2023-11-09 23:27:27 (2 years ago) |
| Status: | Undefined (on last analysis) | |
| Analysis Date: | 2023-11-09 23:27:27 (2 years ago) |
Overview
| Signed By: | Baidu Online Network Technology (Beijing) Co.,Ltd. |
| Status: | Valid |
The signature on Plugin_OptimizerEx.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%\pc faster\5.1.0.0\plugins\plugin.optimizer |
| %programfiles%\pc faster\plugins\plugin.optimizer |
| %programfiles%\pc faster\update\plugins\plugin.optimizer |
| %sysdrive%\adwcleaner\quarantine\files\guqwqsotgqmwbksiznnxxifxoikfobec\5.1.0.0\plugins\plugin.optimizer |
| %sysdrive%\adwcleaner\quarantine\gxix4a2dre\5.1.0.0\plugins\plugin.optimizer |
| %sysdrive%\adwcleaner\quarantine\files\ezchzjrscjhlilcuzbjzskkqfrpdpqgd\5.1.0.0\plugins\plugin.optimizer |
| %sysdrive%\adwcleaner\quarantine\files\qssgcnpdngccdiiasdlhojmtizjqlkav\5.1.0.0\plugins\plugin.optimizer |
| %windir%\windows.old.000\program files (x86)\pc faster\5.1.0.0\plugins\plugin.optimizer |
| %programfiles%\pc faster\5.1.0.0\plugins |
| %sysdrive%\adwcleaner\quarantine\1xvpfvjcrg\5.1.0.0\plugins |
ThreatInfo has observed Plugin_OptimizerEx.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 Plugin_OptimizerEx.dll across 45 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is Thailand with 26.1% 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 Plugin_OptimizerEx.dll is Windows 7 with 66.1% 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
Plugin_OptimizerEx.dll is identified as pe for 32-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.
bcc3216029fc880c3fdd36300ad25637
b1f243390db748ca7209abca8af7e66a
3cfad972686d8fc78ca282c3d5aa708c
4a8df148b768d139682edbefa586f555
a197a074d17e85211eca325c32ebd095
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
This file is still under review
ThreatInfo has not assigned a final verdict yet. Compare the file hash, location, signature, and publisher before trusting the file on a production system.