Is CH34x_Install_Windows_v3_4 (1).zip safe?
No antivirus engine detected malware, and this long-established CH34x driver archive showed installer activity without a malicious sandbox verdict or identified bad child.
The archive received 0 detections from 75 engines, including no alerts from 17 tier-1 engines. It has circulated widely since 2017, and the completed sandbox run showed CH341 driver installation activity without a malware verdict, though some privileged installer techniques merit routine caution.
a48b9bf34d1cb175d8…9e048d7fb49856Recommended next actions
Before opening or extracting
Open or extract it only when its sender or download source has been independently verified.
If you already opened or extracted it
Keep normal device protection enabled and stop if the file behaves unexpectedly.
Intelligence
The saved assessment, checked against the scan evidence and recorded coverage.
The reasoning behind this verdict
This section explains the evidence supporting the verdict and keeps conflicting or missing signals visible.
The archive received 0 detections from 75 engines, including no alerts from 17 tier-1 engines. It has circulated widely since 2017, and the completed sandbox run showed CH341 driver installation activity without a malware verdict, though some privileged installer techniques merit routine caution.
The strongest evidence is unanimous antivirus silence: 0 of 75 engines flagged the archive, while 17 tier-1 engines reported no detection. Its history is also reassuring, with 2,803 sources and 3,688 submissions accumulated since January 2017. One completed sandbox run extracted recognizable CH341 driver files and did not produce a malicious sandbox verdict. Service-related T1543.003 and defense-related T1562.001 are risk-relevant, but driver installers commonly perform privileged system changes and there is no corroborating malicious detection. Ten extracted children produced no identified malicious child, although their individual verdicts remain unknown. The three contacted domains had no cached malicious or suspicious reputation, but the separately observed IP lacked documented coverage.
What We Detected
The archive was not flagged by any of 75 antivirus engines. All 17 tier-1 engines that reported results produced no detection, and no engine supplied a malware-family label. The file is also well established, with 2,803 distinct sources and 3,688 submissions dating back to January 2017.
Threat Behavior
One completed sandbox run launched the CH34x installer and extracted CH341 driver components such as CH341SER.SYS, CH341S64.SYS, INF files, and setup executables. The run recorded T1543.003 and T1562.001, which deserve attention because they involve service-level changes and possible security-control interference; however, the sandbox issued no malicious verdict, and no malicious persistence indicator was recorded. Ten dropped files were inspected without identifying a malicious child, though their individual classifications remain unknown. The three contacted domains had no cached malicious or suspicious reputation; the observed IP address was not documented as covered, so the host-reputation check was not complete for every contact.
What To Do Now
Use the archive only if a CH34x/CH341 serial driver is expected, and obtain it from the hardware vendor or another trusted distribution channel when possible. Keep endpoint protection enabled and allow it to inspect the extracted installer and driver files before installation.
Where this verdict could be wrong3 caveats
- behaviour.offensiveTechniques includes T1543.003 and T1562.001, which can indicate service installation and impairment of defenses, but no sandbox malware verdict or engine detection corroborates malicious use.
- All 10 droppedChildren.children have verdict=null, so hasMaliciousChild=false does not establish that the extracted executables and drivers are affirmatively benign.
- behaviour.contactedIps includes 104.69.90.31, but contactedHosts.inspected=3 corresponds only to the three listed domains; no complete reputation result is available for every observed contact.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- 0/75 antivirus engines reported a malicious or suspicious result.
- 17 tier-1 engines reported no detection.
- The sample has circulated since 2017 across 2,803 distinct sources.
- One sandbox run produced no malicious verdict.
- No malicious dropped child or external-intelligence match was identified.
- Sandbox activity included T1543.003, involving Windows service creation or modification.
- Sandbox activity included T1562.001, associated with attempts to impair defenses.
- The ZIP contains executable and kernel-driver components that require privileged installation.
- All 10 extracted child files remain individually unclassified.
- The observed IP address lacked a documented contacted-host reputation result.
If this CH34x driver is needed, prefer a fresh copy from the hardware vendor and verify its checksum before installation. Keep antivirus and endpoint protection enabled while extracting and running it.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 75 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial3 of 4 contacted hosts were cross-checked; coverage is incomplete.
YARA
CompleteRule evaluation completed with no recorded matches.
External intel
Complete3 of 3 independent reference sources completed.
Behavior
Plain-English impact first, then the observed runtime evidence.
Runtime flight recorder
Capture complete- 1isolated sandbox run
- 11MITRE ATT&CK techniques
- 12spawned processes
- 4network contacts
- 23filesystem & mutex artifacts
What this file did when executed
This file was detonated in 1 sandbox and its runtime behaviour was observed.
Adversary techniques mapped to the MITRE ATT&CK framework.
- cdn.onenote.net
- fp2e7a.wpc.phicdn.net
- fp2e7a.wpc.2be4.phicdn.net
- 104.69.90.31
- HKU\S-1-5-21-575823232-3065301323-1442773979-1000\Software\Microsoft\Internet Explorer\Toolbar\Locked
- HKU\S-1-5-21-575823232-3065301323-1442773979-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Stats\{72853161-30C5-4D22-B7F9-0BBC1D38A37E}\iexplore\Count
- HKU\S-1-5-21-575823232-3065301323-1442773979-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Stats\{72853161-30C5-4D22-B7F9-0BBC1D38A37E}\iexplore\Type
- HKU\S-1-5-21-575823232-3065301323-1442773979-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\Stats\{72853161-30C5-4D22-B7F9-0BBC1D38A37E}\iexplore\Time
- HKEY_CURRENT_USER\SOFTWARE\WinRAR SFX\C%%WCH.CN%CH341SER
- Software\WinRAR SFX\C%%WCH.CN%CH341SER
- __tmp_rar_sfx_access_check_235593
- CH341S98.SYS
- ch341SER.CAT
- CH341SER.INF
- CH341SER.SYS
- C:\WCH.CN\CH341SER\__tmp_rar_sfx_access_check_22945421
- __tmp_rar_sfx_access_check_235593
- __tmp_rar_sfx_access_check_234390
- C:\Users\user\AppData\Local\Microsoft\Windows\WebCache\V0100022.log
- C:\WCH.CN\CH341SER\__tmp_rar_sfx_access_check_5720015
- \Sessions\1\BaseNamedObjects\Global\SyncRootManager
- \Sessions\1\BaseNamedObjects\Local\ZonesCacheCounterMutex
- \Sessions\1\BaseNamedObjects\Local\ZonesLockedCacheCounterMutex
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 45494ce819c1b5c21abb…9b24dbNever scannednever seen before
- a5a07ee7b5195497be47…3353b8Never scannednever seen before
- 0ecd1222627271ea31d3…fd59cbNever scannednever seen before
- 2a946f316edd7e1185de…cd0daeNever scannednever seen before
- 50877bc8ea82bbac833d…23676fNever scannednever seen before
- a8f306d5ba1a23f58728…84c658Never scannednever seen before
- 585fca8ab9c8a1322276…9420bdNever scannednever seen before
- 0cbd34f89b0d11b386e0…22c383Never scannednever seen before
- de6ca1ae927081ac622f…cd64d5Never scannednever seen before
- 9cf96fddf474eda80f2b…b7b8b5Never scannednever seen before
Detection & Forensics
Consensus, attribution, signatures, code structure, prevalence, and identity.
Evidence integrity
Chain of custody for the facts preserved in this report.
- 0rule hits recorded
- 0 / 75engines flagged
- 2,803sources in submission history
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
0 of 75 antivirus engines flagged the file.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
The hash has a long, established submission history across 2,803 sources.
Verdict inputView chapterProvenanceDerivedSourceSubmission historyObserved at - 03
The hash has been submitted 3,688 times from 2,803 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: CH34x_Install_Windows_v3_4 (1).zip — a48b9bf34d1cb175d8e20b0bc6ce3e5264a8724d3bf1b17f1f9e048d7fb49856
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Windows\system32\cmd.exe" /c "cd ^"C:\Users\<USER>\AppData\Local\Temp^" && start /wait ^"^" ^"C:\Users\<USER>\AppData\Local\Temp\CH34x_Install_Windows_v3_4.EXE^"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — "C:\Users\<USER>\AppData\Local\Temp\CH34x_Install_Windows_v3_4.EXE
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: __tmp_rar_sfx_access_check_235593
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: CH341S98.SYS
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: cdn.onenote.net — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: fp2e7a.wpc.phicdn.net — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at
Detection sources at a glance
The available sources did not agree on a named threat category.
MalwareBazaar, YARAify, and CIRCL hashlookup completed and returned no entries for this hash.
YARA rules
No matchesThe rule pass completed without a saved public match.
0 of 75 engines flagged this file
View all 75 engine results
PE structure
Not applicablePE structure analysis applies to Windows executable formats, not this file type.
How widely this file has been seen
Widely seen in the wild for a long time. High prior this is legitimate; isolated detections on common-old files are usually false positives.
Fingerprint and provenance
- File name
- CH34x_Install_Windows_v3_4 (1).zip
- Format
- ZIP
- Code signing
- Not applicable to this file type
- Size
- 189.1 KB
- Last analyzed
- Oct 5, 2026, 2:02 AM UTC
a48b9bf34d1cb175d8e20b0bc6ce3e5264a8724d3bf1b17f1f9e048d7fb49856Safety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
This file appears low risk based on the evidence available now.
- Recovery step 01
Open or extract it only when its sender or download source has been independently verified.
- Recovery step 02
A clean result reduces known risk, but it cannot guarantee that every new or targeted threat has been detected.
- Recovery step 03
Keep your antivirus and Windows updates switched on so you stay protected.
Safety FAQ
Direct answers grounded in the saved verdict and evidence in this report.
Is CH34x_Install_Windows_v3_4 (1).zip safe?
What is CH34x_Install_Windows_v3_4 (1).zip?
How many antivirus engines detected CH34x_Install_Windows_v3_4 (1).zip?
What is the SHA-256 hash of CH34x_Install_Windows_v3_4 (1).zip?
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How up to date is this analysis of CH34x_Install_Windows_v3_4 (1).zip?
Community
Member reviews and reports for this exact file hash.