Is bootstrap.cmd safe?
No antivirus engine detected this tiny batch file, although its recent appearance and lack of runtime observation warrant normal source verification before execution.
All 75 antivirus engines avoided flagging the 274-byte batch file, including 17 high-trust engines, and no external-intelligence source supplied a threat match. Because it is newly observed and has no completed runtime analysis, verify where it came from and inspect the script before running it.
1fe335bae39a8e3e8e…fd0fc99c77c913Recommended next actions
Before running
Run it only when it came from the developer's official site or another source you independently trust.
If you already 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.
All 75 antivirus engines avoided flagging the 274-byte batch file, including 17 high-trust engines, and no external-intelligence source supplied a threat match. Because it is newly observed and has no completed runtime analysis, verify where it came from and inspect the script before running it.
The strongest evidence is the absence of detections across 75 antivirus engines, with all 17 reporting high-trust engines also silent. MalwareBazaar, CIRCL, and YARAify supplied no corroborating threat intelligence, and no heuristic rule fired. Code signing is not meaningful for a DOS batch file, so the missing signature carries no negative weight. Five earlier file-type matches also received benign outcomes, although file-type similarity alone is weak evidence. Confidence is moderated because the sample has appeared only once, while no completed sandbox observation or comprehensive contacted-host reputation result is available.
What We Detected
The 274-byte DOS batch file received no malicious or suspicious detections from 75 antivirus engines. All 17 reporting high-trust engines, including Avast, BitDefender, ESET-NOD32, Kaspersky, and Microsoft, returned no detection. MalwareBazaar, CIRCL, and YARAify provided no matching threat intelligence, and no heuristic rules fired.
Threat Behavior
No completed sandbox run is available, so the script's commands and runtime effects were not observed. A comprehensive reputation check of any hosts it might contact is also unavailable. The sample is newly observed with one recorded submission, which limits historical confidence.
What To Do Now
Confirm that the file came from the expected source and inspect its short text contents before execution. Keep endpoint protection enabled and avoid running it if the commands invoke unexpected downloads, credential access, persistence changes, or security-control modifications.
Where this verdict could be wrong3 caveats
- prevalence.classification=rare_new: only 1 source and 1 submission are recorded, so longer-term reputation is unavailable.
- behaviour=null means the 274-byte batch script was not observed executing, and contactedHosts=null means no complete host-reputation cross-check is available.
- The five similarHashes entries use matchKind=filetype only, so they do not establish shared code or origin.
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 detected a threat
- All 17 reporting tier-1 engines returned no detection
- No MalwareBazaar, CIRCL, or YARAify match
- No triggered heuristic rules
- Five file-type-similar samples previously received safe outcomes
- Newly observed sample with only 1 recorded submission
- No completed runtime observation
- No comprehensive contacted-host reputation result
- Batch scripts can invoke system commands without executable signing
Verify the source and review the 274-byte script before running it. Keep endpoint protection enabled, especially because no runtime analysis is available.
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
PartialRuntime data is present, but no completed sandbox environment is recorded.
Network
Not runNo contacted-host reputation check is recorded.
No timestamp recordedYARA
CompleteRule evaluation completed with no recorded matches.
External intel
Complete3 of 3 independent reference sources completed.
Behavior
Plain-English impact first, then the observed runtime evidence.
Runtime behavior was not available
The report does not treat a missing runtime observation as a clean result.
Detection & Forensics
Consensus, attribution, signatures, code structure, prevalence, and identity.
Evidence integrity
Chain of custody for the facts preserved in this report.
- 0rule hits recorded
- 0 / 75engines flagged
- 1sources 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
No completed runtime observation is available for this file.
ProvenanceDerivedSourceRuntime coverageObserved at - 03
The hash has been submitted 1 time from 1 source.
ProvenanceDerivedSourceSaved report factsObserved 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.
YARA rules
No matchesThe rule pass completed without a saved public match.
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
Barely seen in the wild and first surfaced recently. That limits reputation evidence, but rarity alone is not proof of malware.
Fingerprint and provenance
- File name
- bootstrap.cmd
- Format
- DOS batch file
- Code signing
- Not applicable to this file type
- Size
- 274 B
- Last analyzed
- Sep 21, 2026, 2:27 PM UTC
1fe335bae39a8e3e8e7188f98f55d72d27009d4b4d80c29623fd0fc99c77c913Safety & 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
Run it only when it came from the developer's official site or another source you independently trust.
- 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 bootstrap.cmd safe?
What is bootstrap.cmd?
How many antivirus engines detected bootstrap.cmd?
What is the SHA-256 hash of bootstrap.cmd?
Is it safe to run bootstrap.cmd?
How up to date is this analysis of bootstrap.cmd?
Community
Member reviews and reports for this exact file hash.