Is marlowwwclient-v4.jar safe?
No antivirus engine detected the JAR, while one sandbox produced uncorroborated offensive-technique mappings that warrant ordinary caution about its source.
The JAR received no detections from 75 antivirus engines, including no tier-1 flags, and no external intelligence source identified it. One sandbox mapped activity to process injection, service modification, and defense impairment, but issued no malicious runtime verdict; use the file only if its origin is trusted.
1d76a6d0e084587ca5…0826ce8351cd0eRecommended next actions
Before opening or running
Open or run it only when its publisher and download source have been independently verified.
If you already opened or ran 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.
The JAR received no detections from 75 antivirus engines, including no tier-1 flags, and no external intelligence source identified it. One sandbox mapped activity to process injection, service modification, and defense impairment, but issued no malicious runtime verdict; use the file only if its origin is trusted.
None of 75 antivirus engines flagged the sample, and 13 tier-1 engines explicitly reported no detection. The file has also circulated through 88 sources and 95 submissions without a known threat-family label. One completed sandbox run mapped activity to T1055, T1543.002, and T1562.001, which prevents treating the runtime evidence as wholly routine. However, that sandbox supplied no malicious verdict, no observed network contacts were recorded, and no inspected child was identified as malware. The child verdicts remain unknown and the host-reputation cross-check was not saved, so those areas should not be described as confirmed clean.
What We Detected
No antivirus engine flagged this JAR: 0 of 75 reported it as malicious or suspicious, and 13 tier-1 engines reported no detection. CIRCL, MalwareBazaar, and YARAify supplied no corroborating intelligence, while the sample has appeared in 95 submissions from 88 sources.
Threat Behavior
One completed sandbox run mapped activity to T1055, T1543.002, and T1562.001, covering possible process injection, service modification, and impairment of defenses. These mappings are concerning but did not produce a malicious sandbox verdict. No domains, IP addresses, or URLs were recorded during that run. Nine dropped hashes were inspected without a malicious child finding, although all nine child verdicts remain unknown. The contacted-host reputation check was not saved, so no complete host-reputation result is available.
What To Do Now
Confirm that the JAR came from the expected developer or release channel before running it. Keep endpoint protection enabled and consider executing it in an isolated environment if its source or purpose cannot be verified.
Where this verdict could be wrong3 caveats
- The sandbox mapped activity to T1055, T1543.002, and T1562.001, including possible process injection and defense impairment; these are meaningful risk signals despite lacking engine corroboration.
- All 9 inspected dropped children have unknown verdicts, so droppedChildren.hasMaliciousChild=false does not establish that those files are benign.
- contactedHosts=null means no saved host-reputation cross-check is available, although the recorded sandbox contacts list is empty.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- 0/75 antivirus engines reported a detection.
- engines.tier1Malicious=0, with 13 tier-1 engines reporting no detection.
- behaviour.hasMaliciousSandboxVerdict=false.
- No domains, IP addresses, or URLs were recorded in the completed sandbox run.
- No CIRCL, MalwareBazaar, or YARAify hit was present.
- Sandbox mapping includes T1055 process injection.
- Sandbox mapping includes T1562.001 impairment of defenses.
- Sandbox mapping includes T1543.002 service modification.
- All 9 dropped-child verdicts remain unknown.
- No saved contacted-host reputation cross-check is available.
- JAR signing is not assessed by the available signing summary.
Use the JAR only when it came from a trusted, expected source; otherwise test it in isolation. Keep antivirus and endpoint protection enabled.
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
Complete1 signature or behavior rule 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
- 0network contacts
- 15filesystem & 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
marlowwwclient-v4.jar
1d76a6d0e084587ca58ba50db833f033cc8efda9ad57af04b20826ce8351cd0e
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\<USER>\Desktop\runtime.jar"
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
5720
C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\5720
04Isolated runtime analysis - Written fileObserved
3903daac9bc4a3b7.timestamp
C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
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\Temp\hsperfdata_<USER>\5720
- C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
- C:\ProgramData\Oracle\Java\.oracle_jre_usage\17dfc292991c8786.timestamp
- C:\Users\user\AppData\Local\Temp\hsperfdata_user
- C:\Users\user\AppData\Local\Temp\hsperfdata_user\6992
- C:\Users\user\AppData\Local\Temp\hsperfdata_user\3436
- /tmp/hsperfdata_root/3530
Files this sample writes at runtime
This file drops 9 children at runtime. None are currently flagged malicious in our cache.
- 640b9c3d58d6109305be…5b0e0fNever scannednever seen before
- 912af5fbc23d14ebbbf1…979801Never scannednever seen before
- 37b617c9f01e2821a8da…6844faNever scannednever seen before
- c1de3a9376fdaef0ba6a…308b70Never scannednever seen before
- d87c5f3cdfb5b7c0510e…1ade9eNever scannednever seen before
- 61625fd8b084f70f242d…55abd2Never scannednever seen before
- 50c82f36208ed8040447…2d7843Never scannednever seen before
- 8e8711854186c68e2368…4a3c7cNever scannednever seen before
- 759aafcfa2395ce1b800…2af0f7Never 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.
- 1rule hit recorded
- 0 / 75engines flagged
- 88sources 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 75 antivirus engines flagged the file.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
1 high-confidence signature or behavior rule matched this file.
Verdict inputView chapterProvenanceDerivedSourceSignature and behavior rulesObserved at - 03
The hash has been submitted 95 times from 88 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: marlowwwclient-v4.jar — 1d76a6d0e084587ca58ba50db833f033cc8efda9ad57af04b20826ce8351cd0e
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\<USER>\Desktop\runtime.jar"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: 5720 — C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\5720
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: 3903daac9bc4a3b7.timestamp — C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
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:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\<USER>\Desktop\runtime.jar"
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
- marlowwwclient-v4.jar
- Format
- JAR
- Code signing
- Not applicable to this file type
- Size
- 2.3 MB
- Last analyzed
- Sep 17, 2026, 4:47 AM UTC
1d76a6d0e084587ca58ba50db833f033cc8efda9ad57af04b20826ce8351cd0eSafety & 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
Open or run it only when its publisher and download source have been independently verified.
- 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 marlowwwclient-v4.jar safe?
What is marlowwwclient-v4.jar?
How many antivirus engines detected marlowwwclient-v4.jar?
What is the SHA-256 hash of marlowwwclient-v4.jar?
Is it safe to open or run marlowwwclient-v4.jar?
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Community
Member reviews and reports for this exact file hash.