Is 704e1050-cd55-4567-9ac8-88a31fa6bd96 safe?
Sandbox shows credential-dumping and process-injection activity despite zero engine detections.
No antivirus engine flagged the file, yet sandbox evidence records LSASS access and multiple rundll32 loads of dropped DLLs. The combination of offensive MITRE techniques with zero detections and medium prevalence leaves the file in mixed-signal territory.
06f9346da3f382345b…fa44da3b71c103Recommended next actions
Before opening or extracting
Do not open or extract it until the source can be verified independently.
If you already opened or extracted 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.
No antivirus engine flagged the file, yet sandbox evidence records LSASS access and multiple rundll32 loads of dropped DLLs. The combination of offensive MITRE techniques with zero detections and medium prevalence leaves the file in mixed-signal territory.
Zero detections across 75 engines rules out a clear malicious consensus, but the sandbox captured T1003 credential access and T1055 process injection via rundll32 on dropped DLLs. These techniques are rarely used by legitimate software. The file is only hours old, has medium prevalence, and no prior similar-hash verdicts exist to provide grounding. Contacted-host reputation data is unavailable, so network behaviour cannot be cross-checked. The evidence therefore supports a suspicious classification rather than safe or malicious.
What We Detected
75 engines returned no malicious or suspicious labels. Sandbox execution wrote ten dropped files, launched rundll32 against several of them, and accessed LSASS memory—activity mapped to MITRE T1003 and T1055.
Threat Behavior
The observed process-injection and credential-dumping techniques are consistent with credential-theft tooling, yet no engine family consensus or external-intel corroboration exists. No malicious child files or known-bad hosts were identified.
What To Do Now
Keep the file quarantined. Do not execute it on production systems. If the file is required for legitimate work, run it only in an isolated analysis environment and monitor for further suspicious behaviour.
- Zero detections across 75 engines
- No malicious child files
- Medium prevalence from five submitters
- Sandbox observed LSASS access (T1003)
- Multiple dropped DLLs loaded via rundll32 (T1055)
- File first seen less than 24 hours ago
Treat the sample as suspicious; block pending further sandbox or dynamic-analysis results.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 75 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Not runNo contacted-host reputation check is recorded.
No timestamp recordedYARA
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
- 19MITRE ATT&CK techniques
- 15spawned processes
- 0network contacts
- 25filesystem & mutex artifacts
What this file does
Observed actions and their security significance
High concern: Accessed operating-system credential data, which can expose saved passwords.
High concern: Injected code into another process, a technique that can conceal execution.
High concern: Searched files or settings where passwords and keys may be stored.
High concern: Accessed browser or password-store data that may contain saved logins.
High concern: Attempted to impair or bypass security controls.
High concern: Manipulated how the operating system loads code, which can redirect execution.
Moderate concern: Contained obfuscated or packed code that makes inspection harder.
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
704e1050-cd55-4567-9ac8-88a31fa6bd96
06f9346da3f382345bf9ae726ee3bcf1d8032bae35f4620962fa44da3b71c103
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Windows\system32\rundll32.exe" "C:\Users\<USER>\AppData\Local\Temp\ARMClient.Authentication.dll",#1
02Isolated runtime analysis - ProcessObserved
Observed process
"C:\Windows\system32\rundll32.exe" "C:\Users\<USER>\AppData\Local\Temp\ARMClient.Library.dll",#1
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
thumbcache_idx.db
C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_idx.db
04Isolated runtime analysis - Written fileObserved
thumbcache_32.db
C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_32.db
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
5 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.
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_idx.db
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_32.db
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\iconcache_idx.db
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\iconcache_32.db
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_256.db
- Local\SessionImmersiveColorMutex
- Global\C::Users:Bruno:AppData:Local:Microsoft:Windows:Explorer:thumbcache_idx.db!rwWriterMutex
- Global\C::Users:Bruno:AppData:Local:Microsoft:Windows:Explorer:thumbcache_16.db!dfMaintainer
- Global\C::Users:Bruno:AppData:Local:Microsoft:Windows:Explorer:thumbcache_32.db!dfMaintainer
- Global\C::Users:Bruno:AppData:Local:Microsoft:Windows:Explorer:thumbcache_48.db!dfMaintainer
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 576b74eb4ab1287fc39e…fd4a28Never scannednever seen before
- 5002a835984e01671181…d689f3Never scannednever seen before
- 0c6e533e29f9487cc5e9…c68009Never scannednever seen before
- b71fe4083e2119fccda8…58a471Never scannednever seen before
- 90d4ca5ab2baf128d46a…cce5f3Never scannednever seen before
- 7e8b8ff7b1475e6368aa…648020Never scannednever seen before
- 7b1bbdd36dfccf96d8b9…8578eaNever scannednever seen before
- f7c0cdf946354679295d…4a31f1Never scannednever seen before
- 9931b5d62e7fb38eeb8f…a90647Never scannednever seen before
- 7da16ef846948a94f665…cf07beNever 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 / 75engines flagged
- 5sources 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 75 antivirus engines flagged the file.
ProvenanceObservedSourceAntivirus analysisObserved at - 03
The hash has been submitted 6 times from 5 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: 704e1050-cd55-4567-9ac8-88a31fa6bd96 — 06f9346da3f382345bf9ae726ee3bcf1d8032bae35f4620962fa44da3b71c103
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Windows\system32\rundll32.exe" "C:\Users\<USER>\AppData\Local\Temp\ARMClient.Authentication.dll",#1
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — "C:\Windows\system32\rundll32.exe" "C:\Users\<USER>\AppData\Local\Temp\ARMClient.Library.dll",#1
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: thumbcache_idx.db — C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_idx.db
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: thumbcache_32.db — C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\thumbcache_32.db
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\system32\rundll32.exe" "C:\Users\<USER>\AppData\Local\Temp\ARMClient.Authentication.dll",#1Sandbox 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
0 of 75 engines flagged this file
View all 75 engine results
PE structure
Not applicablePE structure analysis applies to Windows executable formats, not this file type.
How widely this file has been seen
Moderate prevalence — neither rare nor common. No strong prior applies.
Fingerprint and provenance
- File name
- 704e1050-cd55-4567-9ac8-88a31fa6bd96
- Format
- ZIP
- Code signing
- Not applicable to this file type
- Size
- 1.2 MB
- Last analyzed
- Aug 17, 2026, 1:40 AM UTC
06f9346da3f382345bf9ae726ee3bcf1d8032bae35f4620962fa44da3b71c103Safety & 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 or extract 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 archive 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 704e1050-cd55-4567-9ac8-88a31fa6bd96 safe, or is it malware?
What is 704e1050-cd55-4567-9ac8-88a31fa6bd96?
How many antivirus engines detected 704e1050-cd55-4567-9ac8-88a31fa6bd96?
What should I do if I already opened or extracted 704e1050-cd55-4567-9ac8-88a31fa6bd96?
How do I remove 704e1050-cd55-4567-9ac8-88a31fa6bd96?
What is the SHA-256 hash of 704e1050-cd55-4567-9ac8-88a31fa6bd96?
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Community
Member reviews and reports for this exact file hash.