Is setup.exe safe?
Unsigned installer showing process-injection and direct-IP behaviour with multiple similar imphash samples previously flagged malicious.
Zero of 76 engines flagged the file, yet the sandbox recorded T1055 process injection and 19 direct-IP connections. Three of five prior imphash matches were labelled malicious (crack, kepavll). The combination of unsigned status, offensive techniques, and RAG history keeps the file in mixed-signals territory.
a76a101852e3b35cf6…caf834f8895644Recommended next actions
Before installing
Do not install it until the source and publisher can be verified independently.
If you already installed it
Stop using it, scan the device, and watch for unexpected behavior or security alerts. Download a fresh installer from the developer's official site or an official app store.
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.
Zero of 76 engines flagged the file, yet the sandbox recorded T1055 process injection and 19 direct-IP connections. Three of five prior imphash matches were labelled malicious (crack, kepavll). The combination of unsigned status, offensive techniques, and RAG history keeps the file in mixed-signals territory.
No antivirus engine raised an alert, but the runtime evidence shows two offensive MITRE techniques and direct-IP traffic without domain resolution. The imphash matches three previously malicious samples that carried crack or generic-trojan labels. The file is unsigned and carries an installer filename, yet its age and submission count indicate it is not brand-new. Because the host-reputation check is missing, the direct-IP activity cannot be fully assessed. These conflicting signals produce a borderline suspicious verdict.
What We Detected
76 engines scanned the sample; none returned a malicious or suspicious result. The binary is unsigned and contains an Inno-Setup-style installer footprint. Sandbox execution logged MITRE T1055 (process injection) and T1134 (token manipulation) plus 19 direct-IP connections.
Threat Behavior
The observed techniques are commonly used by both legitimate installers and malware. Three of five prior files sharing the same imphash were previously classified malicious with hacktool or generic-trojan families. No dropped child files were flagged malicious, and external-intel sources returned no hits.
What To Do Now
Do not run the file on production systems. If installation is required, execute it in an isolated virtual machine and monitor network activity. Keep endpoint protection enabled; the lack of detections does not guarantee safety given the behavioural red flags.
Where this verdict could be wrong1 caveat
- contactedHosts is null — no host-reputation cross-check completed; cannot confirm whether the 19 IPs are malicious.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- Zero engine detections across 76 scanners
- Common-old prevalence (140 submitters)
- No malicious dropped children
- Unsigned executable
- Sandbox recorded T1055 process injection
- 19 direct-IP connections without domain names
- 3/5 similar imphash samples previously malicious
Treat as suspicious; run only in an isolated environment and monitor for unexpected network or process activity.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 76 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial20 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
- 17MITRE ATT&CK techniques
- 15spawned processes
- 20network contacts
- 40filesystem & mutex artifacts
What this file does
Observed actions and their security significance
High concern: Injected code into another process, a technique that can conceal execution.
Moderate concern: Contained obfuscated or packed code that makes inspection harder.
Moderate concern: Runs hidden system commands (script or shell).
Moderate concern: Communicated over a common application protocol; malware can use this for command-and-control.
Moderate concern: Scans through your files and folders.
Moderate concern: Communicates over the network in a non-standard way.
Moderate concern: Decoded or unpacked concealed content while running.
These are observed capabilities from an isolated analysis. A technique does not prove malicious intent on its own, and the file never ran on your device.
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
setup.exe
a76a101852e3b35cf6e1ad0f3a61e67b8110ddc235e5447b96caf834f8895644
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\<USER>\AppData\Local\Temp\program.exe"
02Isolated runtime analysis - ProcessObserved
Observed process
"C:\Users\<USER>\AppData\Local\Temp\is-B6J6P.tmp\program.tmp" /SL5="$2019C,3138322,168448,C:\Users\<USER>\AppData\Local\Temp\program.exe"
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
_shfoldr.dll
C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\_isetup\_shfoldr.dll
04Isolated runtime analysis - Written fileObserved
b2p.dll
C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\b2p.dll
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
a83f:8110:3845:33c9:4883:4424:6802:488d
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
a83f:8110:2800:1800:4000:1800:1800:100
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.
- a83f:8110:3845:33c9:4883:4424:6802:488d
- a83f:8110:2800:1800:4000:1800:1800:100
- 168.62.240.75
- 23.216.147.76
- 168.62.242.76
- 20.62.24.77
- 192.229.211.108
- 20.99.133.109
- 104.99.238.82
- 20.99.186.246
- C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\_isetup\_shfoldr.dll
- C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\b2p.dll
- C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\isskin.dll
- C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\ISDone.dll
- C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\CallbackCtrl.dll
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERDCC3.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERDDCD.tmp.csv
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERDE5A.tmp.txt
- C:\Windows\System32\spp\store\2.0\cache\cache.dat
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER29AB.tmp.WERInternalMetadata.xml
- Local\RstrMgr3887CAB8-533F-4C85-B0DC-3E5639F8D511
- Local\RstrMgr-3887CAB8-533F-4C85-B0DC-3E5639F8D511-Session0000
- CTF.LBES.MutexDefaultS-1-5-21-1482476501-1645522239-1417001333-500
- CTF.Compart.MutexDefaultS-1-5-21-1482476501-1645522239-1417001333-500
- CTF.Asm.MutexDefaultS-1-5-21-1482476501-1645522239-1417001333-500
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 450b9b0ba25bf068afbc…fd0105Never scannednever seen before
- 9884e9d1b4f8a873ccbd…360d87Never scannednever seen before
- 89ff2808ec92b072f347…e8398eNever scannednever seen before
- 68f42a7823ed7ee88a5c…aa172dNever scannednever seen before
- bb8a0245dcc5c10a1c71…38ac71Never scannednever seen before
- a9f575ef25f9d66a1b2c…5b6d99Never scannednever seen before
- 25fdb94e386f8a41f10a…2b0a68Never scannednever seen before
- a4c86fc4836ac728d7bd…95fd81Never scannednever seen before
- 220ad5116fb05c9db453…4b4d2bNever scannednever seen before
- 693d652499e721e8f381…fd1004Never 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 / 76engines flagged
- 140sources in submission history
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
1 high-confidence signature or behavior rule matched this file.
Verdict inputView chapterProvenanceDerivedSourceSignature and behavior rulesObserved at - 02
0 of 76 antivirus engines flagged the file.
ProvenanceObservedSourceAntivirus analysisObserved at - 03
The hash has a long, established submission history across 140 sources.
ProvenanceDerivedSourceSubmission historyObserved at - 04
Scanned file: setup.exe — a76a101852e3b35cf6e1ad0f3a61e67b8110ddc235e5447b96caf834f8895644
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Users\<USER>\AppData\Local\Temp\program.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — "C:\Users\<USER>\AppData\Local\Temp\is-B6J6P.tmp\program.tmp" /SL5="$2019C,3138322,168448,C:\Users\<USER>\AppData\Local\Temp\program.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: _shfoldr.dll — C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\_isetup\_shfoldr.dll
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: b2p.dll — C:\Users\<USER>\AppData\Local\Temp\is-TC91V.tmp\b2p.dll
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: a83f:8110:3845:33c9:4883:4424:6802:488d — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: a83f:8110:2800:1800:4000:1800:1800:100 — 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:\Users\<USER>\AppData\Local\Temp\program.exe"The 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.
Evidencea83f:8110:3845:33c9:4883:4424:6802:488d · a83f:8110:2800:1800:4000:1800:1800:100 · 168.62.240.75
0 of 76 engines flagged this file
View all 76 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
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
- setup.exe
- Format
- Win32 EXE
- Code signing
- No verified publisher
- Size
- 3.6 MB
- Last analyzed
- Sep 5, 2026, 12:09 AM UTC
a76a101852e3b35cf6e1ad0f3a61e67b8110ddc235e5447b96caf834f8895644Safety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
We couldn't fully clear this file. Treat it with caution.
- Recovery step 01
Don't install it unless you're certain it came from a source you trust.
- Recovery step 02
Check where you got it — an unexpected attachment or a random download link is a red flag.
- Recovery step 03
If its origin cannot be confirmed, delete this file and use a fresh copy from a trusted source. Download a fresh installer from the developer's official site or an official app store.
- Recovery step 04
If you're still unsure, scan it again in a day or two — detections often catch up on newer files.
Safety FAQ
Direct answers grounded in the saved verdict and evidence in this report.
Is setup.exe safe, or is it malware?
What is setup.exe?
How many antivirus engines detected setup.exe?
I already downloaded and installed setup.exe — what should I do?
How do I remove setup.exe?
What is the SHA-256 hash of setup.exe?
How up to date is this analysis of setup.exe?
Community
Member reviews and reports for this exact file hash.