Is ffx_backend_dx12_x64.dll safe?
No antivirus engine detected malware, the DLL has a valid CD PROJEKT signature, and five signer-matched files have consistent benign histories.
All 74 antivirus engines returned no malware or suspicious detection, including 17 high-trust engines. The verified CD PROJEKT signature and five signer-matched benign precedents outweigh the sandbox's uncorroborated process-injection mapping and direct-IP traffic, although those IPs lack a complete reputation check.
bd2212b435cdd4b1bd…86005a66a0657dRecommended 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 malware or suspicious detection, including 17 high-trust engines. The verified CD PROJEKT signature and five signer-matched benign precedents outweigh the sandbox's uncorroborated process-injection mapping and direct-IP traffic, although those IPs lack a complete reputation check.
The antivirus results show no detections among 74 engines, with all 17 high-trust engines silent. The DLL carries a verified CD PROJEKT S.A. signature, and there is no detected mismatch between its claimed identity and signer. Five other files matched by signer received benign prior assessments, providing stronger publisher context than the single-sample signer statistic alone. One sandbox mapped activity to process injection and impairment of defenses, but it issued no malicious verdict and found no persistence. Four IP contacts remain a limitation because no complete host-reputation result is available, yet no engine, child-file, or external-intelligence evidence corroborates malware.
What We Detected
None of 74 antivirus engines flagged this DLL, and all 17 high-trust engines reported no detection. The file has a verified digital signature from CD PROJEKT S.A., with no brand mismatch or packing indicators. Five signer-matched files in prior analysis also received benign assessments.
Threat Behavior
One completed sandbox run mapped activity to T1055 and T1562.001 and observed connections to four IP addresses. These are meaningful caution signals, but the sandbox produced no malicious verdict, recorded no persistence, and the ten inspected child hashes contained no identified malicious child. A complete reputation check for the contacted IPs is unavailable, so the no complete contacted-host reputation result was available.
What To Do Now
Use the DLL only as part of software obtained through CD PROJEKT's official release or update channel. Keep endpoint protection enabled and verify the signature and SHA-256 hash if the file came from an unusual location or an unofficial download.
Where this verdict could be wrong3 caveats
- The completed sandbox mapped activity to T1055 and T1562.001, two offensive techniques that warrant caution despite the absence of a malicious runtime verdict.
- behaviour.contactedIps lists four external IP addresses, but contactedHosts=null means their reputation was not completely checked or saved.
- signing.signerStats.totalSamples=1 is too limited to establish a broad long-term certificate history, although five signer-matched prior verdicts support the publisher 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 detections
- 17/17 tier-1 engines reported no detection
- Verified signature from CD PROJEKT S.A.
- 5/5 signer-matched prior verdicts were benign
- No malicious sandbox verdict or malicious child
- Sandbox mapping to MITRE T1055 process injection
- Sandbox mapping to MITRE T1562.001 impairment of defenses
- Four direct-IP contacts without a complete host-reputation result
- Limited signerStats history of one sample
Use this DLL when it comes from a verified CD PROJEKT installation or official update. If its origin is uncertain, re-download it from the official channel and keep security protection enabled.
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
Partial4 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
- 15MITRE ATT&CK techniques
- 15spawned processes
- 4network 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_backend_dx12_x64.dll
bd2212b435cdd4b1bd66d36dde8e8f94de8cd728af8155848d86005a66a0657d
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\ffx_backend_dx12_x64.dll",#1
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\system32\WerFault.exe -u -p 5104 -s 136
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
25686c5b-f1eb-4151-b435-993c941faa31
C:\ProgramData\Microsoft\Windows\WER\Temp\25686c5b-f1eb-4151-b435-993c941faa31
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
135.233.45.223
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
135.233.45.221
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.
- 135.233.45.223
- 135.233.45.221
- 135.234.160.246
- 172.178.240.163
- C:\ProgramData\Microsoft\Windows\WER\Temp
- C:\ProgramData\Microsoft\Windows\WER\Temp\25686c5b-f1eb-4151-b435-993c941faa31
- C:\ProgramData\Microsoft\Windows\WER\ReportQueue
- C:\ProgramData\Microsoft\Windows\WER\Temp\cd73d4df-1ec7-4ce6-b5a6-6404d85295fa
- C:\ProgramData\Microsoft\Windows\WER\ReportArchive
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC40B.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERCBDC.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERCD64.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC40B.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERCBDC.tmp.WERInternalMetadata.xml
- Local\WERReportingForProcess5104
- Global\AmiProviderMutex_InventoryApplicationFile
- Global\1b0e09d2-c66f-4b67-aea8-2f41aa90b659
- \Sessions\1\BaseNamedObjects\Local\SessionImmersiveColorMutex
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess692
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 0845c75bce3b88b1a466…de8430Never scannednever seen before
- acae68adf6df90b262d2…33e5d6Never scannednever seen before
- cce8db5c2803c7120018…4fc913Never scannednever seen before
- f87b6f82ae8956a41666…76bd6cNever scannednever seen before
- 8cbae003163980e79957…8da4feNever scannednever seen before
- 351763c2de8bdc4cd9d9…874e38Never scannednever seen before
- 6b2a7f9b15040ed3c7cd…4186eaNever scannednever seen before
- 827dbd271f332b150812…e564a6Never scannednever seen before
- 02567d55f32d755f44a4…4e6bd2Never scannednever seen before
- 8d1b995629c9a639247e…59dc49Never 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
- 98sources 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_backend_dx12_x64.dll — bd2212b435cdd4b1bd66d36dde8e8f94de8cd728af8155848d86005a66a0657d
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\ffx_backend_dx12_x64.dll",#1
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\system32\WerFault.exe -u -p 5104 -s 136
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: Temp — C:\ProgramData\Microsoft\Windows\WER\Temp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: 25686c5b-f1eb-4151-b435-993c941faa31 — C:\ProgramData\Microsoft\Windows\WER\Temp\25686c5b-f1eb-4151-b435-993c941faa31
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 135.233.45.223 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 135.233.45.221 — 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_backend_dx12_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.
Evidence135.233.45.223 · 135.233.45.221 · 135.234.160.246
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_backend_dx12_x64.dll
- Format
- Win32 DLL
- Code signing
- Signature valid: CD PROJEKT S.A.
- Size
- 12.3 MB
- Last analyzed
- Sep 23, 2026, 5:12 AM UTC
bd2212b435cdd4b1bd66d36dde8e8f94de8cd728af8155848d86005a66a0657dSafety & 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_backend_dx12_x64.dll safe?
What is ffx_backend_dx12_x64.dll?
How many antivirus engines detected ffx_backend_dx12_x64.dll?
Is ffx_backend_dx12_x64.dll digitally signed?
What is the SHA-256 hash of ffx_backend_dx12_x64.dll?
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Community
Member reviews and reports for this exact file hash.