Is ffx_opticalflow_x64.dll safe?
No antivirus engine detected the signed CD PROJEKT DLL, and five matching publisher samples support it despite uncorroborated behavioral alerts.
All 74 antivirus engines returned no detection, including 17 tier-1 engines, and the DLL has a verified CD PROJEKT S.A. signature. Five prior files from the same verified signer also received clean assessments; the behavioral alerts merit context, but neither the sandbox nor inspected child files supplied corroborating malware evidence.
df5c692a58519d82a4…e3fde148635c2bRecommended next actions
Before using
Use it only as part of software obtained from the developer's official site or another source you independently trust.
If you already used 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.
All 74 antivirus engines returned no detection, including 17 tier-1 engines, and the DLL has a verified CD PROJEKT S.A. signature. Five prior files from the same verified signer also received clean assessments; the behavioral alerts merit context, but neither the sandbox nor inspected child files supplied corroborating malware evidence.
The strongest evidence is complete detection silence: 0 of 74 engines flagged the DLL, including all 17 tier-1 participants. Its signature verifies to CD PROJEKT S.A., and five prior signer-matched files—including closely related graphics DLLs—received clean assessments. One completed sandbox mapped activity to T1055 and T1562.001, but it issued no malicious verdict and found no persistence indicators. Ten inspected child hashes produced no known malicious child, while researcher intelligence supplied no matching malware rules or known-family hit. Two direct IP contacts remain a limitation because no complete host-reputation cross-check is available, but they are not independently sufficient to outweigh the publisher, engine, and related-file evidence.
What We Detected
None of the 74 antivirus engines flagged this DLL, and all 17 tier-1 engines reported no detection. The file carries a verified signature from CD PROJEKT S.A. Five previously assessed files matching that signer also received clean results, including four similarly named graphics components.
Threat Behavior
One sandbox run mapped activity to T1055 and T1562.001 and observed connections to two external IP addresses. These techniques can be concerning, but the sandbox supplied no malicious verdict or persistence indicators, and none of 10 inspected child files was known to be malicious. Because contactedHosts is unavailable, no complete reputation conclusion can be made about the observed IP addresses.
What To Do Now
Use the DLL only as part of an intact game or software installation obtained through CD PROJEKT or an authorized distribution channel. Keep endpoint protection enabled, and investigate further if the signature fails verification on the local copy or the file appeared outside its expected installation directory.
Where this verdict could be wrong3 caveats
- behaviour.offensiveTechniques includes T1055 and T1562.001, which can indicate process injection and impairment of defenses, although the single sandbox produced no malicious verdict.
- MalwareTips.Synth.DirectIpC2 recorded contacts to 172.178.240.161 and 135.234.160.245; contactedHosts=null means their reputation was not completely checked.
- signing.signerStats.totalSamples=1 is too limited to establish a strong long-term publisher history independently.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- 0/74 antivirus engines detected the file.
- All 17 tier-1 engines reported no detection.
- Verified signature from CD PROJEKT S.A.
- Five of five prior signer-matched assessments were clean.
- No malicious sandbox verdict or malicious inspected child was recorded.
- Runtime mapping included T1055 and T1562.001.
- Two direct IP contacts were observed without a completed host-reputation cross-check.
- Historical signer statistics contain only one directly recorded sample.
Retain the file when it came from a verified CD PROJEKT installation or authorized game platform. Keep endpoint protection enabled and rescan or reinstall from the official channel if its origin or local signature is uncertain.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 74 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial2 runtime contacts were observed without a completed reputation cross-check.
YARA
Complete2 signature or behavior rules matched.
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
- 14MITRE ATT&CK techniques
- 15spawned processes
- 2network contacts
- 40filesystem & mutex artifacts
Attack story
Runtime observations grouped by analysis stage. Arrows organize the stages; they do not claim chronology or causality.
Input file
The submitted object
- FileObserved
ffx_opticalflow_x64.dll
df5c692a58519d82a488b5a551093ac48f5eb17498f211bea2e3fde148635c2b
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\ffx_opticalflow_x64.dll",#1
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\system32\WerFault.exe -u -p 6652 -s 500
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
Temp
C:\ProgramData\Microsoft\Windows\WER\Temp
04Isolated runtime analysis - Written fileObserved
073d8b9a-e24d-4a80-a9fe-9d85f50fd188
C:\ProgramData\Microsoft\Windows\WER\Temp\073d8b9a-e24d-4a80-a9fe-9d85f50fd188
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
172.178.240.161
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
135.234.160.245
Contact observed during runtime.
07Isolated runtime analysis - +1 more recorded observation in Analyst mode
7 recorded facts from one runtime window. Every fact remains independently traceable in Analyst mode.
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.
- 172.178.240.161
- 135.234.160.245
- C:\ProgramData\Microsoft\Windows\WER\Temp
- C:\ProgramData\Microsoft\Windows\WER\Temp\073d8b9a-e24d-4a80-a9fe-9d85f50fd188
- C:\ProgramData\Microsoft\Windows\WER\ReportQueue
- C:\ProgramData\Microsoft\Windows\WER\Temp\efbedeff-c4c2-40ea-9da7-b8183beb65aa
- C:\ProgramData\Microsoft\Windows\WER\ReportArchive
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC10D.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERCA55.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERCC1C.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC10D.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERCA55.tmp.WERInternalMetadata.xml
- Local\WERReportingForProcess6652
- Global\AmiProviderMutex_InventoryApplicationFile
- Global\69ea5714-680a-456f-865e-ffd971b8a96f
- \Sessions\1\BaseNamedObjects\Local\SessionImmersiveColorMutex
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess5328
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 96bbd600d0dcebd1da2b…5287dfNever scannednever seen before
- 060e4fc101ad3da19b14…d5524aNever scannednever seen before
- 2f0a8d8599f371ae645e…2e7d09Never scannednever seen before
- c34116db3de4d7bb4b18…d39955Never scannednever seen before
- 78304c24389ce5077447…9c5c9cNever scannednever seen before
- bd9237ae16f8e0a997a0…66e6b2Never scannednever seen before
- c012a1b95a23d4c681aa…568658Never scannednever seen before
- a0f26281406a04e611c4…209604Never scannednever seen before
- 73665ebddf023637490c…6ac9d0Never scannednever seen before
- b0e42aa8a22def99d10b…a1d801Never 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.
- 2rule hits recorded
- 0 / 74engines flagged
- 84sources 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 74 antivirus engines flagged the file.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
The file has a valid code signature from CD PROJEKT S.A..
ProvenanceObservedSourceCode-signing metadataObserved at - 03
1 high-confidence signature or behavior rule matched this file.
Verdict inputView chapterProvenanceDerivedSourceSignature and behavior rulesObserved at - 04
Scanned file: ffx_opticalflow_x64.dll — df5c692a58519d82a488b5a551093ac48f5eb17498f211bea2e3fde148635c2b
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\ffx_opticalflow_x64.dll",#1
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\system32\WerFault.exe -u -p 6652 -s 500
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: Temp — C:\ProgramData\Microsoft\Windows\WER\Temp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: 073d8b9a-e24d-4a80-a9fe-9d85f50fd188 — C:\ProgramData\Microsoft\Windows\WER\Temp\073d8b9a-e24d-4a80-a9fe-9d85f50fd188
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 172.178.240.161 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 135.234.160.245 — 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.
Signatures and behavior heuristics
A community signature or high-severity behavioral heuristic matched. Signatures identify known patterns; heuristics are strong leads but are not proof on their own.
The saved runtime evidence maps this activity to MITRE T1055 (Process Injection). The mapping supports possible process injection, but it does not prove the exact injection method or the operator's intent.
Evidence"C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\ffx_opticalflow_x64.dll",#1The sample contacted an external IP address directly and no application domain was recorded. Direct-IP traffic also occurs in legitimate installers and infrastructure, so this is supporting context only and requires corroboration from host reputation and other runtime evidence.
Evidence172.178.240.161 · 135.234.160.245
0 of 74 engines flagged this file
View all 74 engine results
Section entropy & packers
No high-entropy executable section or known packer signature was detected. Data and resource sections can still have high entropy without indicating packed code.
How widely this file has been seen
Moderate prevalence — neither rare nor common. No strong prior applies.
Fingerprint and provenance
- File name
- ffx_opticalflow_x64.dll
- Format
- Win32 DLL
- Code signing
- Signature valid: CD PROJEKT S.A.
- Size
- 175.6 KB
- Last analyzed
- Sep 23, 2026, 5:17 AM UTC
df5c692a58519d82a488b5a551093ac48f5eb17498f211bea2e3fde148635c2bSafety & 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
Use it only as part of software obtained from the developer's official site or another source you independently trust.
- 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 ffx_opticalflow_x64.dll safe?
What is ffx_opticalflow_x64.dll?
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Is ffx_opticalflow_x64.dll digitally signed?
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Community
Member reviews and reports for this exact file hash.