Is opsec-1.21.11+v1.1.7.1.jar safe?
No antivirus engine identified malware, while one completed sandbox run produced no malicious verdict despite two cautionary offensive-technique mappings and unresolved direct-IP reputation.
None of 75 antivirus engines flagged this JAR, including all 17 reporting tier-1 engines, and the completed sandbox run did not issue a malicious verdict. However, mappings to T1055 and T1562.001 plus an unresolved direct-IP connection justify retaining normal endpoint protection and obtaining the file only from its expected source.
15bc3b001f1f74db11…d34bff5d3b216fRecommended 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.
None of 75 antivirus engines flagged this JAR, including all 17 reporting tier-1 engines, and the completed sandbox run did not issue a malicious verdict. However, mappings to T1055 and T1562.001 plus an unresolved direct-IP connection justify retaining normal endpoint protection and obtaining the file only from its expected source.
The strongest evidence is broad antivirus agreement: 0 of 75 engines detected the sample, with no tier-1 detections. One completed sandbox run did not produce a malicious verdict, and no malicious child was identified among five inspected files. Researcher-curated intelligence also returned no matching rules or known-malware record. Counter-signals include runtime mappings to process injection and impairment of defenses, along with direct-IP traffic. Because the contacted-host check was not completed and all five child verdicts remain unknown, those areas cannot be described as clean; nevertheless, the overall evidence favors a benign interpretation.
What We Detected
None of 75 antivirus engines flagged the JAR, including 17 reporting tier-1 engines. No named malware family, hacktool label, researcher-curated YARA match, or known-malware intelligence record was present.
Threat Behavior
One completed sandbox run did not issue a malicious verdict. It nevertheless mapped activity to T1055 and T1562.001, and recorded a connection to 162.159.36.2. These are cautionary signals rather than proof of hostile intent, and no complete host-reputation result is available because the contacted-host cross-check was not saved. Five written child files were inspected without a malicious result, but all five remain unclassified.
What To Do Now
Keep endpoint protection enabled and confirm that the hash and download source match the software provider or project you intended to use. If the JAR came from an unsolicited message, unofficial mirror, or unexpected mod bundle, avoid launching it until its provenance is verified.
Where this verdict could be wrong3 caveats
- T1055 and T1562.001 are offensive runtime mappings that warrant caution even though no engine identified malware.
- The direct-IP contact to 162.159.36.2 was not reputation-checked because contactedHosts=null.
- All five dropped children have unknown verdicts, so their absence of a malicious classification is not affirmative evidence that they are benign.
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 malicious or suspicious result.
- engines.tier1Malicious=0, with 17 tier-1 engines reporting undetected.
- behaviour.hasMaliciousSandboxVerdict=false in one completed sandbox run.
- droppedChildren.hasMaliciousChild=false among 5 inspected children.
- YARAify, CIRCL, and MalwareBazaar returned no matching intelligence.
- Runtime evidence maps activity to MITRE T1055 (Process Injection).
- Runtime evidence maps activity to MITRE T1562.001 (Impair Defenses).
- A direct connection to 162.159.36.2 lacks a completed host-reputation check.
- All five dropped-child verdicts remain unknown.
- The sample was first observed only 16 days before analysis.
Use the JAR only if it came from the expected official project or trusted distribution channel. Keep endpoint protection enabled and avoid granting elevated permissions unless the software's documented function requires them.
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
Partial1 runtime contact was 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
- 14MITRE ATT&CK techniques
- 6spawned processes
- 1network contacts
- 11filesystem & mutex artifacts
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.
- 162.159.36.2
- C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\2600
- 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\7036
- C:\Users\user\AppData\Local\Temp\hsperfdata_user\5484
- /tmp/hsperfdata_root/3536
Files this sample writes at runtime
This file drops 5 children at runtime. None are currently flagged malicious in our cache.
- 24c4584d9e0334561c34…f497e2Never scannednever seen before
- 5ac9cd081ef95ef9ddca…d215cfNever scannednever seen before
- 228f91f7e64064a7f562…88861cNever scannednever seen before
- 999a47a756453ea261dc…cfcc6fNever scannednever seen before
- d87c5f3cdfb5b7c0510e…1ade9eNever 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
- 31sources 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 33 times from 31 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: opsec-1.21.11+v1.1.7.1.jar — 15bc3b001f1f74db1142baa3461dd1da2c5aa790a61225d53dd34bff5d3b216f
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\<USER>\Desktop\download.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: 2600 — C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\2600
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: 3903daac9bc4a3b7.timestamp — C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 162.159.36.2 — 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:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\<USER>\Desktop\download.jar"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.
Evidence162.159.36.2
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
- opsec-1.21.11+v1.1.7.1.jar
- Format
- JAR
- Code signing
- Not applicable to this file type
- Size
- 489.7 KB
- Last analyzed
- Sep 26, 2026, 9:12 PM UTC
15bc3b001f1f74db1142baa3461dd1da2c5aa790a61225d53dd34bff5d3b216fSafety & 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 opsec-1.21.11+v1.1.7.1.jar safe?
What is opsec-1.21.11+v1.1.7.1.jar?
How many antivirus engines detected opsec-1.21.11+v1.1.7.1.jar?
What is the SHA-256 hash of opsec-1.21.11+v1.1.7.1.jar?
Is it safe to open or run opsec-1.21.11+v1.1.7.1.jar?
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Community
Member reviews and reports for this exact file hash.