File scan report
Verdict Safe
Is bb5bmchi.
A validly signed Anthropic, PBC executable flagged by just one of the 71 antivirus engines that checked it with a generic label, while all major antivirus engines and the sandbox…
Read the whole reasonShow less
Moderate evidence · No engine flags it, but no publisher signature confirms who made it.
This program appears safe to use if it came from Anthropic's official source. Check that the signature reads Anthropic, PBC, and keep your security software enabled.
Good practice2 tips
We found nothing harmful in this file.
Run it only if it came from the developer's own website or an official app store.
Keep your antivirus and Windows updates switched on.
No scanner can promise a file is 100% safe.
Antivirus results
1 of 71 flagged
- Flagged 1
- No detection 70
- No result 4
- Code signing Anthropic, PBC
- Test run Completed
- First seen 3d ago
Chapter 02
Why we think so
2 points against it and 4 in its favour, checked against the scan evidence.
The reasoning behind this verdict
Only DeepInstinct flagged this program, using a generic label with no malware family, and none of the major antivirus engines agreed. The file carries a valid signature from Anthropic, PBC and the combined sandbox verdict was clean with no high-risk techniques. The lone detection looks like a false positive.
The digital signature from Anthropic, PBC verified correctly, though the publisher has no history in our records. The combined sandbox verdict was clean with no high-risk techniques, no injection and only background network traffic. Similar-looking files built with the same import table were flagged before, but they came from unrelated, unsigned authors and reflect a shared build toolchain rather than shared code. The file is rare and first seen on Oct 23, 2026, which lowers confidence slightly.
What We Detected
One of the 71 antivirus engines that checked it, DeepInstinct, flagged this executable with a generic label that names no malware family. None of the major antivirus engines detected it. The file carries a valid code signature from Anthropic, PBC, and it shows no signs of packing.
Threat Behavior
The combined sandbox verdict was clean. They recorded only techniques common in legitimate software, no process injection, no dropped files and no network activity beyond the analysis machine's own background traffic. Some unrelated, unsigned files built with the same toolchain were previously flagged, but that reflects a shared build framework, not this program's behaviour.
What To Do Now
The evidence points to a false positive. Download the program from Anthropic's official channel, and confirm that the signature shows Anthropic, PBC before you run it. Keep your antivirus enabled.
Where this verdict could be wrong2 caveats
- Files sharing this build layout were previously linked to Vidar and Sliver samples, though those were unsigned files from different authors and the match reflects a common build toolchain.
- The file is rare and first seen on Oct 23, 2026, so its publisher has no history in our records.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- Valid code signature from Anthropic, PBC
- No major antivirus engines flagged the file
- The combined sandbox verdict was clean with no high-risk techniques
- No hits in external malware databases or community rule sets
- The file is rarely submitted and was first seen on Oct 23, 2026.
- One engine flagged it with a generic detection.
6 sources checked · all complete. See every source
Chapter 03
What it did in our test
It ran in 3 isolated tests; no test environment rated what it did as risky.
Test run summary
Capture complete- 3isolated sandbox runs
- 8sandbox rule tags
- 4spawned processes
- 0network contacts
- 0filesystem & mutex artifacts
What this file did when executed
This file was detonated in 3 sandboxes and its runtime behaviour was observed.
Sandbox verdicts
1- VT: CLEANclean
Techniques observed in the sandbox
8MITRE ATT&CK techniques the sandbox mapped. Highlighted ones are rare in normal software; the others are common in legitimate programs too.
- T1027· Obfuscated code
- T1027.002· Obfuscated code
- T1036
- T1071· Application protocol
- T1129· Loads modules
- T1553
- T1553.002
- T1574· Execution hijack
Observed activity
Processes started
4Programs the file ran, with their command lines.
program.exe"C:\Users\<USER>\Desktop\program.exe"program.exe"C:\Users\user\Desktop\program.exe" -installprogram.exe"C:\Users\user\Desktop\program.exe" /installprogram.exe"C:\Users\user\Desktop\program.exe" /load
Sandbox background — not the file
1The analysis machine's own processes and connections, recorded in every run.
- VM host
atm.teams.mira.tm.svc.cloud.microsoft
Chapter 04
Technical details
1 of the 71 antivirus engines that checked it flags it; signed by Anthropic, PBC.
Sources checked
Every check behind this verdict
6 sources checked · all complete. Complete means the check returned a usable result; it does not mean the file is safe.
Engines that flagged it 1
The saved verdict treats these detections as likely false positives.
- DeepInstinctMALICIOUS
File fingerprint
- Last analyzed
- Oct 23, 2026, 9:27 AM UTC
- SHA-256
7924551b7f6d4e90b99c081ef684679992fac2e6a381daeca0dd83e565555735- SHA-1
0ce5b59b95c2763b8a2df89de0a1fb6c53e93eb7- MD5
e6afbd3089ee3e9a7c8f6734af5c1b81
About this file
bb5bmchi.exe is a Win32 EXE file of 1.6 MB.
- Type and size
- Win32 EXE · 1.6 MB
- Signer
- Anthropic, PBCValid code signature.
- First seen
- Oct 23, 2026On VirusTotal.
- Submitted by
- 1 sourceRarely seen: few people have submitted this exact file.
- Packer
- None detected
- Entropy
- 5.57 of 8
First scanned
Antivirus consensus
1 of 71 engines flagged this file
4 of the 75 engines returned no result for this file (file type not supported, or the scan did not finish), so they did not check it.
- Tier-118 engines0flagged
- Tier-236 engines1flagged
- Low-trust17 engines0flagged
View all 75 engine results
- DeepInstinctMalicious: MALICIOUS
- AcronisClean
- AhnLab-V3Clean
- AlibabaClean
- alibabacloudClean
- ALYacClean
- Antiy-AVLClean
- APEXClean
- ArcabitClean
- AvastClean
- Avast-MobileNo result
- AVGClean
- AviraClean
- BitDefenderClean
- BitDefenderFalxNo result
- BkavClean
- CAT-QuickHealClean
- ClamAVClean
- CMCClean
- CrowdStrikeClean
- CTXClean
- CylanceClean
- CynetClean
- DrWebClean
- ElasticClean
- EmsisoftClean
- ESET-NOD32Clean
- F-SecureClean
- FortinetClean
- GDataClean
- GoogleClean
- GridinsoftClean
- huorongClean
- IkarusClean
- JiangminClean
- K7AntiVirusClean
- K7GWClean
- KasperskyClean
- KingsoftClean
- LionicClean
- MalwarebytesClean
- MaxSecureClean
- McAfeeDClean
- MicrosoftClean
- MicroWorld-eScanClean
- NANO-AntivirusClean
- PaloaltoClean
- PandaClean
- RisingClean
- SangforClean
- SentinelOneClean
- SkyhighClean
- SophosClean
- SUPERAntiSpywareClean
- SymantecClean
- SymantecMobileInsightNo result
- TACHYONClean
- tehtrisClean
- TencentClean
- TrapmineClean
- TrellixENSClean
- TrendMicroClean
- TrendMicro-HouseCallClean
- TrustlookNo result
- VaristClean
- VBA32Clean
- VIPREClean
- VirITClean
- ViRobotClean
- WebrootClean
- XcitiumClean
- YandexClean
- ZillyaClean
- ZoneAlarmClean
- ZonerClean
Section entropy & packers
No high-entropy executable section or known packer signature was detected. Data and resource sections can still have high entropy without indicating packed code.
How widely this file has been seen
Barely seen in the wild and first surfaced recently. 1 antivirus detection make that low prevalence materially relevant, but rarity alone is not proof of malware.
Chapter 05
Questions & answers
Short answers to the 7 questions people ask most about this file.
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What is bb5bmchi.exe?
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Community
Member reviews and reports for this exact file hash.