Is KryptonAvengersAddon.jar safe?
Zero detections across 75 engines and no sandbox verdict despite three MITRE techniques.
The file triggered no antivirus detections and no sandbox verdict. Three MITRE techniques were observed but the sandbox did not classify the behaviour as malicious.
bfda535b81bf916adf…15b28437dd4c00Recommended 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 file triggered no antivirus detections and no sandbox verdict. Three MITRE techniques were observed but the sandbox did not classify the behaviour as malicious.
All 75 engines returned clean results, including 16 tier-1 engines. The single sandbox run produced no malicious verdict despite mapping three MITRE techniques. Nine dropped children were inspected and none flagged malicious. The file is common_new with 155 submitters and no external-intel hits.
What We Detected
Zero malicious detections from 75 engines. Sandbox observed process injection (T1055), service creation (T1543.002) and defence-evasion (T1562.001) but returned no malicious verdict.
Threat Behavior
Runtime evidence shows Java execution and temporary file writes typical of legitimate JAR utilities. no complete contacted-host reputation result was available contacts or dropped malicious children were found.
What To Do Now
Keep endpoint protection enabled. The file can be executed if its source is trusted, but monitor for unexpected behaviour.
Where this verdict could be wrong1 caveat
- behaviour.offensiveTechniques include T1055, T1543.002, T1562.001 — three MITRE techniques that malware commonly uses, though sandbox verdict remains clean.
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 detections across 75 engines
- No sandbox malicious verdict
- No malicious dropped children
- Widely submitted (common_new)
- Three MITRE techniques mapped by sandbox (T1055, T1543.002, T1562.001)
The evidence supports treating the file as clean; continue normal security practices.
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
KryptonAvengersAddon.jar
bfda535b81bf916adfbb2696ebe60a81423221ec65e75e894d15b28437dd4c00
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
4888
C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\4888
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>\4888
- 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\7008
- C:\Users\user\AppData\Local\Temp\hsperfdata_user\1028
- /tmp/hsperfdata_root/3564
Files this sample writes at runtime
This file drops 9 children at runtime. None are currently flagged malicious in our cache.
- 4a2f8e9e20f33990a3be…586176Never scannednever seen before
- bc957005a859bf328f8a…b9f444Never scannednever seen before
- 4a865b7ec246edb0549d…a5d8e5Never scannednever seen before
- b468bf508c1b034631c5…457d6eNever 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
- 155sources 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 171 times from 155 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: KryptonAvengersAddon.jar — bfda535b81bf916adfbb2696ebe60a81423221ec65e75e894d15b28437dd4c00
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: 4888 — C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\4888
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
Lots of people are uploading this but it's recent — typical of newly-released legitimate software. Low prior for malware.
Fingerprint and provenance
- File name
- KryptonAvengersAddon.jar
- Format
- JAR
- Code signing
- Not applicable to this file type
- Size
- 1012.3 KB
- Last analyzed
- Aug 27, 2026, 5:11 PM UTC
bfda535b81bf916adfbb2696ebe60a81423221ec65e75e894d15b28437dd4c00Safety & 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 KryptonAvengersAddon.jar safe?
What is KryptonAvengersAddon.jar?
How many antivirus engines detected KryptonAvengersAddon.jar?
What is the SHA-256 hash of KryptonAvengersAddon.jar?
Is it safe to open or run KryptonAvengersAddon.jar?
How up to date is this analysis of KryptonAvengersAddon.jar?
Community
Member reviews and reports for this exact file hash.