Safe
Zero engine detections on a 17-year-old common DLL tied to a known game installer despite sandbox process-injection flags.
51f2682279e28386aa…9f0c544159The reasoning behind this verdict
The MT AI Engine weighs every signal from this scan — antivirus detections, sandbox behaviour, code signing, prevalence and historical matches — to reach a single, evidence-based verdict.
The complete absence of malicious detections across tier-1 and tier-2 engines combined with a 2009 NSRL match and 786 prior submissions strongly indicates a legitimate game component. The observed MITRE techniques and direct-IP contacts are consistent with older game launchers that use rundll32 and connect to static CDN IPs. No malicious children, no malicious hosts, and no brand mismatch further support a benign classification.
Each signal cites a concrete token from the evidence the arbiter saw — engine name, MITRE technique, signer string, or an exact count.
engines: 0 malicious detections out of 74 total (16 tier-1 clean)
externalIntel.circl.hit=true with productName 'FINAL FANTASY XI ONLINE VANA'DIEL COLLECTION 2007'
prevalence.classification=common_old (612 sources, 786 submissions)
behaviour.offensiveTechniques count=4 (T1055, T1134, T1543.003, T1547.001) and triggeredHeuristics[0].rule=MalwareTips.Synth.ProcessInjection
similarHashes.length=0 — no prior RAG matches
- Zero detections across 74 engines
- NSRL match for known game title
- High historical prevalence since 2009
- No malicious dropped children or hosts
- Unsigned binary
- Sandbox observed process injection (T1055)
- Direct-IP network contact without DNS
Keep the file if it belongs to FINAL FANTASY XI; otherwise isolate and re-scan the parent installer.
What to do now
This file looks safe based on everything we checked.
This file is safe to use.
Good habit: only download files from the official website or an app store.
Keep your antivirus and Windows updates switched on so you stay protected.
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.
- 184.24.37.120
- 17.249.105.246
- 17.253.21.204
- 17.253.6.125
- 17.253.24.125
- 17.253.20.125
- 17.248.185.40
- 23.63.250.8
- 17.253.21.202
- 17.248.185.235
- C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_58f421ab8e6d13ac64e44a83cde1e39d372bd9e_82810a17_06dc6f7a
- C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_58f421ab8e6d13ac64e44a83cde1e39d372bd9e_82810a17_06dc6f7a\Report.wer
- C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_b412da6d79cdd825c2778bd5cd0bf1353333d0_82810a17_0e28339a
- C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_b412da6d79cdd825c2778bd5cd0bf1353333d0_82810a17_0e28339a\Report.wer
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER2AFF.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER2AFF.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER2AFF.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER2E8A.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER2E8A.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER2F56.tmp
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess7748
- \Sessions\1\BaseNamedObjects\Global\AmiProviderMutex_InventoryApplicationFile
- \Sessions\1\BaseNamedObjects\Global\6d4daaf0-07d0-4591-89ab-06264c996acf
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess3924
- \Sessions\1\BaseNamedObjects\Global\458c68c1-8aa3-4580-a33e-fd1a901516f2
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- b9603cfbee5dc7403885…c66cc4Never scannednever seen before
- 589dc8523d837bf0077b…de9096Never scannednever seen before
- 428b7a7ee7c05d5f0d24…323360Never scannednever seen before
- abf8ba72ed7e9fa75219…75a96cNever scannednever seen before
- c091af3c9770935c6ee2…7bf289Never scannednever seen before
- cd24d0e33dde51bbb8fe…f0896aNever scannednever seen before
- 7cb842161bb4c4003c4f…05cc0dNever scannednever seen before
- f1a1189712ab3c5e3775…fcc0d9Never scannednever seen before
- db6f3df6654dcc35e4db…3396f4Never scannednever seen before
- b4a490390a242301e2d6…bf2d69Never scannednever seen before
1 corroborating signal from researcher-curated sources
YARA & heuristic rule matches
A researcher-curated or high-severity heuristic rule matched this sample. These rules target specific malware families and are near-definitive.
MITRE T1055 (Process Injection) observed — CreateRemoteThread / APC / reflective-DLL injection. The payload is being smuggled into a legitimate process to bypass AV hooks.
Evidence"C:\Windows\System32\rundll32.exe" "C:\Users\<USER>\Desktop\library.dll",#1Sample contacted 20 external IP address(es) and zero domains. Benign software virtually always uses DNS; no-DNS direct-IP C2 is a strong malware indicator because it bypasses reputation systems and dodges domain-based blocklists.
Evidence184.24.37.120 · 17.249.105.246 · 17.253.21.204
0 detections across 74 engines
Section entropy & packers
Section-level entropy and packer detection from the PE header. Nothing suspicious here — entropy is within the normal range for unpacked code.
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.
Forensic fingerprint
- File name
- SETUPAPI.DLL
- Size
- 333.3 KB
- MIME type
- (unknown)
- Detected type
- Win32 DLL
- SHA-256
- 51f2682279e28386aa9c0eb8ba4f8ac3000c9ff75cf7e2456e8cdd9f0c544159
- MD5
- 5991908f571101d7dda613dbb679aa5b
- SHA-1
- b91e56d2fb8d03fcb59893a47ea73f9f3768ef23
- PE imphash
- 34e609de713a84ae984541be5b4ecb82
- First seen (VT)
- 4/18/2009, 12:20:04 PM
- Last analysis (VT)
- 7/12/2026, 8:42:48 AM
- First scan (MalwareTips)
- 7/19/2026, 7:52:01 AM
- Last scan (MalwareTips)
- 7/19/2026, 7:52:01 AM
- Community reputation
- +15trusted
Safety FAQ
Common questions about SETUPAPI.DLL, answered from the scan data above.
- SETUPAPI.DLL appears safe. 74 of 74 antivirus engines report it clean. As a habit, only run files you downloaded from the official source, since attackers sometimes distribute trojanised copies of legitimate software under the same name.
- SETUPAPI.DLL is a Windows executable program, about 333 KB. Our analysis found no threat indicators for it. A file's name can be reused by different files, so we identify it by its cryptographic hash (below).
- None — all 74 antivirus engines we queried report SETUPAPI.DLL as clean. That's reassuring, though brand-new malware can briefly evade detection before vendors add signatures, so we also weigh the file's behaviour and reputation.
- The SHA-256 hash of SETUPAPI.DLL is 51f2682279e28386aa9c0eb8ba4f8ac3000c9ff75cf7e2456e8cdd9f0c544159, and its MD5 is 5991908f571101d7dda613dbb679aa5b. This hash is the file's unique fingerprint — two files with the same SHA-256 are identical. Use it to confirm you're looking at exactly this file (not just one with the same name) when comparing against antivirus databases or a download's published checksum.
- Based on this scan, yes — SETUPAPI.DLL shows no threat indicators. The important caveat is source: make sure you downloaded it from the official website or a trusted store, because attackers sometimes distribute malware-laced copies under a legitimate file's name. If your own antivirus flags it while we report it clean, that is most often a false positive, but verify the source before overriding your antivirus.
- This report reflects the scan run on July 19, 2026. Because a file's hash never changes, the identity of SETUPAPI.DLL is fixed — but antivirus coverage improves over time, so a file that looks clean today can pick up detections later (and vice-versa). If you need the latest picture, MalwareTips staff can re-run the analysis from scratch.
Reviews & malware reports(0)
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