Is f_0083bd safe?
Sparse unwanted-software detections conflict with established prevalence, but the unsigned installer’s process-injection, destructive-action, and LSASS-related signals warrant caution.
Three of 75 engines flagged this unsigned executable, primarily as unwanted bundled software; the single Neshta label lacks independent family agreement. One runtime analysis recorded T1055, T1134, T1485, and LSASS-related activity, so the file should not be trusted despite broad engine silence and long-standing prevalence.
6c6fb40971632eb14c…c52a614ac1ca1fRecommended next actions
Before opening
Do not open it until the source can be verified independently.
If you already opened it
Stop using it, scan the device, and watch for unexpected behavior or security alerts. Get a fresh copy from the original trusted source and verify its exact hash when possible.
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.
Three of 75 engines flagged this unsigned executable, primarily as unwanted bundled software; the single Neshta label lacks independent family agreement. One runtime analysis recorded T1055, T1134, T1485, and LSASS-related activity, so the file should not be trusted despite broad engine silence and long-standing prevalence.
The detection count is limited to 3 of 75 engines, and only DrWeb contributes a tier-1 alert, naming potentially unwanted software rather than a firmly established malware family. Malwarebytes independently identifies a bundle installer, while VBA32's Neshta label is low-trust and uncorroborated. More concerningly, completed runtime evidence maps activity to T1055, T1134, and T1485 and records LSASS-related process targeting. The executable is unsigned, leaving no verified publisher identity to explain or offset that behavior. Long-standing prevalence, the absence of a malicious sandbox verdict, and no identified malicious child reduce confidence in a malware attribution, but they do not neutralize the offensive behavioral evidence.
What We Detected
Three of 75 antivirus engines flagged the executable. DrWeb reported Program.Unwanted.5065, Malwarebytes reported PUP.Optional.BundleInstaller, and low-trust VBA32 reported Trojan.Neshta; these labels do not establish a consistent malware family. The file is unsigned and has no publisher history.
Threat Behavior
One completed runtime analysis recorded techniques T1055, T1134, and T1485, covering possible process injection, token manipulation, and destructive file activity. A separate heuristic also associated process activity with LSASS, which can indicate credential-access behavior. The sandbox did not issue a malicious verdict, no inspected child was identified as malicious, and the observed host-reputation check covered only three hosts rather than every network contact.
What To Do Now
Do not run the file on a production system. Obtain the installer directly from the software publisher, verify its digital signature and hash, and keep endpoint protection enabled; if it already ran, perform a full security scan and review credential and system activity.
Where this verdict could be wrong5 caveats
- Only 3/75 engines detected the sample, and 16 of 17 reporting tier-1 engines did not flag it.
- behaviour.hasMaliciousSandboxVerdict=false, although the completed run still recorded T1055, T1134, T1485, and LSASS-related activity.
- droppedChildren.hasMaliciousChild=false, but all 10 inspected children have unknown individual verdicts.
- externalIntel.yaraify.ruleCount=0 and externalIntel.malwareBazaar.hit=false provide no researcher-curated family corroboration.
- The 5/5 safe similarHashes results are only imphash matches without signer co-matches, making installer-framework collision a substantial limitation.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- 16 of 17 reporting tier-1 engines did not flag the sample
- prevalence.uniqueSources=3008 across prevalence.timesSubmitted=3799
- behaviour.hasMaliciousSandboxVerdict=false
- droppedChildren.hasMaliciousChild=false
- externalIntel.yaraify.ruleCount=0 and externalIntel.malwareBazaar.hit=false
- Unsigned Win32 executable with no verified publisher history
- 3/75 engine detections, including DrWeb and Malwarebytes unwanted-software labels
- Runtime technique T1055 indicates possible process injection
- Runtime techniques T1134 and T1485 indicate token manipulation and destructive-action potential
- LSASS-related process activity triggered MalwareTips.Synth.CredentialDumper
- Negative file.reputation=-15
Avoid this copy and obtain the software from its official publisher with a valid digital signature. If executed, keep protection enabled, run a full scan, and review the system for credential-access or injection activity.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete3 of 75 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial3 of 23 contacted hosts were cross-checked; coverage is incomplete.
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
- 25MITRE ATT&CK techniques
- 15spawned processes
- 23network contacts
- 36filesystem & 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.
High concern: Used an input-capture technique that can record credentials or keystrokes.
High concern: Manipulated how the operating system loads code, which can redirect execution.
Moderate concern: Contained obfuscated or packed code that makes inspection harder.
Moderate concern: Runs hidden system commands (script or shell).
Moderate concern: Removed execution artefacts or logs, which can conceal activity.
Moderate concern: Communicated over a common application protocol; malware can use this for command-and-control.
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
f_0083bd
6c6fb40971632eb14c5b0fcce876c26f19d17d78a67885758cc52a614ac1ca1f
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\<USER>\Desktop\file.exe"
02Isolated runtime analysis - ProcessObserved
Observed process
"C:\Users\<USER>\AppData\Local\Temp\is-BNFT1.tmp\file.tmp" /SL5="$34019C,29025676,139264,C:\Users\<USER>\Desktop\file.exe"
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
file.tmp
C:\Users\<USER>\AppData\Local\Temp\is-BNFT1.tmp\file.tmp
04Isolated runtime analysis - Written fileObserved
Setup Log 2026-01-17 #001.txt
C:\Users\<USER>\AppData\Local\Temp\Setup Log 2026-01-17 #001.txt
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostDerived
www.microsoft.com
Saved reputation verdict: safe.
06Contacted-host cross-check - Contacted hostDerived
res.public.onecdn.static.microsoft
Saved reputation verdict: safe.
07Contacted-host cross-check - +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.
- www.microsoft.com
- res.public.onecdn.static.microsoft
- svc.ha-teams.office.com
- 20.99.186.246
- 184.25.191.235
- 20.99.133.109
- 23.216.81.152
- 192.168.0.1
- 192.168.0.67
- 23.198.171.50
- 192.168.0.52
- 23.6.103.183
- 20.99.185.48
- HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\GoogleUpdaterInternalService126.0.6462.0\Start
- HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\GoogleUpdaterInternalService126.0.6462.0\ImagePath
- HKEY_USERS\S-1-5-21-4270068108-2931534202-3907561125-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.exe\OpenWithProgids\exefile
- C:\Users\<USER>\AppData\Local\Temp\is-BNFT1.tmp\file.tmp
- C:\Users\<USER>\AppData\Local\Temp\Setup Log 2026-01-17 #001.txt
- C:\Users\<USER>\AppData\Local\Temp\is-GV16V.tmp\_isetup\_setup64.tmp
- C:\Users\<USER>\AppData\Local\Temp\is-GV16V.tmp\RdZone.dll
- C:\Users\<USER>\AppData\Local\Temp\is-GV16V.tmp\Inno_English.lng
- C:\Users\<USER>\AppData\Local\Temp\is-GV16V.tmp\DBInstaller.exe
- C:\Users\<USER>\AppData\Local\Temp\is-GV16V.tmp\DriverBooster.exe
- C:\Users\<USER>\AppData\Local\Temp\is-GV16V.tmp\EULA.rtf
- C:\Users\<USER>\AppData\Local\Temp\is-GV16V.tmp\Icon_1.bmp
- C:\Users\<USER>\AppData\Local\Temp\is-GV16V.tmp\Inno_English.lng
- {066BAF58-22F1-4PQ6-BC2A-0731D99C8805}
- \Sessions\1\BaseNamedObjects\Global\SyncRootManager
- \Sessions\1\BaseNamedObjects\Local\ZonesCacheCounterMutex
- \Sessions\1\BaseNamedObjects\Local\ZonesLockedCacheCounterMutex
- \Sessions\1\BaseNamedObjects\{066BAF58-22F1-4PQ6-BC2A-0731D99C8805}
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 02444937bdf1a642bee5…0d77cdNever scannednever seen before
- 8dfc033ff5a1ebac9282…15c6ebNever scannednever seen before
- 193facd48ea0e183c782…c6fb2eNever scannednever seen before
- b0148882eeb7eb2ce49d…b1d20eNever scannednever seen before
- fde2853ad9bb488e0dcd…ad6a6bNever scannednever seen before
- c2d6cf832388f0d208d1…358553Never scannednever seen before
- eac93ca567a74199dacb…d3369eNever scannednever seen before
- 72b0a2afd5775f2d4097…5ca00eNever scannednever seen before
- ec99401f120a3d527e04…73bc91Never scannednever seen before
- 3d476bdc9b4cd2b66def…70cc27Never 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
- 3 / 75engines flagged
- 3,008sources 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
3 of 75 antivirus engines flagged the file, including DrWeb and Malwarebytes.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 03
The hash has a long, established submission history across 3,008 sources.
ProvenanceDerivedSourceSubmission historyObserved at - 04
Scanned file: f_0083bd — 6c6fb40971632eb14c5b0fcce876c26f19d17d78a67885758cc52a614ac1ca1f
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Users\<USER>\Desktop\file.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — "C:\Users\<USER>\AppData\Local\Temp\is-BNFT1.tmp\file.tmp" /SL5="$34019C,29025676,139264,C:\Users\<USER>\Desktop\file.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: file.tmp — C:\Users\<USER>\AppData\Local\Temp\is-BNFT1.tmp\file.tmp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: Setup Log 2026-01-17 #001.txt — C:\Users\<USER>\AppData\Local\Temp\Setup Log 2026-01-17 #001.txt
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: www.microsoft.com — Saved reputation verdict: safe.
ProvenanceDerivedSourceContacted-host cross-checkObserved at - 10
Contacted host: res.public.onecdn.static.microsoft — Saved reputation verdict: safe.
ProvenanceDerivedSourceContacted-host cross-checkObserved at
Detection sources at a glance
Category: pua
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.
EvidenceC:\Windows\System32\svchost.exe -k NetworkService -pSandbox observed process activity targeting LSASS (Windows credential store). Legitimate software has no business reading LSASS memory — this is Mimikatz-shape behaviour.
EvidenceC:\Windows\system32\lsass.exe
3 of 75 engines flagged this file
View all 75 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
- f_0083bd
- Format
- Win32 EXE
- Code signing
- No verified publisher
- Size
- 28.4 MB
- Last analyzed
- Oct 1, 2026, 9:41 AM UTC
6c6fb40971632eb14c5b0fcce876c26f19d17d78a67885758cc52a614ac1ca1fSafety & 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 open 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. Get a fresh copy from the original trusted source and verify its exact hash when possible.
- 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 f_0083bd safe, or is it malware?
What is f_0083bd?
How many antivirus engines detected f_0083bd?
I already downloaded and opened f_0083bd — what should I do?
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Community
Member reviews and reports for this exact file hash.