Safe
Legitimate Bitwarden password manager installer, signed by trusted publisher, clean across our antivirus network with expected installation behavior.
b8b932755a5de03ef4…98a1ea5296The verdict, reasoned out.
Not a rules engine. The MT AI Engine reads every signal we collected, weighs them against history, and commits to an answer.
No detections from 72 engines including 17 tier-1 scanners confirm this file is safe. The Bitwarden Inc. signature matches our trusted publisher list, aligning with the filename and version. Sandbox behavior shows standard installer actions like tasklist checks and downloads from official domains/IPs, explaining the MITRE flags and heuristics. Medium prevalence supports it as commodity software without red flags from children, contacts, or intel.
Each signal cites a concrete token from the evidence the arbiter saw — engine name, MITRE technique, signer string, or an exact count.
signing.trustedPublisher.matched=true ('Bitwarden')
engines.malicious=0/72, tier1Malicious=0
contactedUrls[0]='https://artifacts.bitwarden.com/desktop/bitwarden-2026.2.1-x64.nsis.7z'
behaviour.hasMaliciousSandboxVerdict=false, droppedChildren.hasMaliciousChild=false
- Trusted Bitwarden publisher match
- Zero malicious engine detections
- Official artifact downloads
- Medium prevalence (262 subs)
- No malicious sandbox/child verdicts
- Heuristic flags on process injection (T1055) and LSASS observation
- Direct IP contacts (legit CDNs)
This file is safe and appears to be the genuine Bitwarden installer. Run it confidently if downloaded from official channels.
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.
- 199.232.197.91
- 104.18.21.213
- 162.159.36.2
- http://r13.c.lencr.org/68.crl
- https://artifacts.bitwarden.com/desktop/bitwarden-2026.2.1-x64.nsis.7z
- C:\Users\<USER>\AppData\Local\Temp\nsmC38F.tmp\System.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmC38F.tmp\UAC.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmC38F.tmp\StdUtils.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmC38F.tmp\modern-wizard.bmp
- C:\Users\<USER>\AppData\Local\Temp\nsmC38F.tmp\nsDialogs.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmC38F.tmp\package.7z
- C:\Users\<USER>\AppData\Local\Temp\nskD216.tmp
- C:\Users\<USER>\AppData\Local\Temp\nsfD246.tmp
- C:\Users\user\AppData\Local\Temp\nsf80BA.tmp
- C:\Users\user\AppData\Local\Temp\nsz8099.tmp
- 173a9bac-6f0d-50c4-8202-4744c69d091a
- \Sessions\1\BaseNamedObjects\173a9bac-6f0d-50c4-8202-4744c69d091a
Files this sample writes at runtime
This file drops 7 children at runtime. None are currently flagged malicious in our cache.
- 3eb38ae99653a7dbc724…f2eacaNever scannednever seen before
- 1e40211af65923c2f4fd…632172Never scannednever seen before
- ed04a4823f221e9197b8…6c810aNever scannednever seen before
- 35176dd40612d7542af4…1cacf8Never scannednever seen before
- 2f7f8fc05dc4fd0d5cda…52dc08Never scannednever seen before
- b72e9013a6204e9f0107…31601eNever scannednever seen before
- 5d9ceb1ce5f35aea5f9e…58b962Never scannednever seen before
YARA + heuristic rules that fired
A researcher-curated or high-severity heuristic rule matched this sample. These rules target specific malware families and are near-definitive.
MITRE T1055 (Process Injection) observed — CreateRemoteThread / APC / reflective-DLL injection. The payload is being smuggled into a legitimate process to bypass AV hooks.
EvidenceC:\Windows\System32\svchost.exe -k NetworkService -pSandbox observed process activity targeting LSASS (Windows credential store). Legitimate software has no business reading LSASS memory — this is Mimikatz-shape behaviour.
EvidenceC:\Windows\system32\lsass.exeSample contacted 3 external IP address(es) and zero domains. Benign software virtually always uses DNS; no-DNS direct-IP C2 is a strong malware indicator because it bypasses reputation systems and dodges domain-based blocklists.
Evidence199.232.197.91 · 104.18.21.213 · 162.159.36.2
0 detections across 76 engines
Section entropy & packers
Section-level entropy and packer detection from the PE header. Nothing suspicious here — entropy is within the normal range for unpacked code.
How often this file shows up in the wild
Moderate prevalence — neither rare nor common. No strong prior applies.
Forensic fingerprint
- File name
- Bitwarden-Installer-2026.2.1.exe
- Size
- 714.9 KB
- MIME type
- (unknown)
- Detected type
- Win32 EXE
- SHA-256
- b8b932755a5de03ef41e13a0332c4cd50437dda2da10d7ec5633ed98a1ea5296
- MD5
- 70b52776f2167d8a0a224f244cf19450
- SHA-1
- 54f3734732ab0caecf0ca04b15c9de20c71d014d
- PE imphash
- b34f154ec913d2d2c435cbd644e91687
- First seen (VT)
- 3/5/2026, 9:04:03 AM
- Last analysis (VT)
- 4/12/2026, 12:50:59 AM
- First scan (MalwareTips)
- 5/6/2026, 8:23:00 AM
- Last scan (MalwareTips)
- 5/6/2026, 8:23:00 AM
- Code signer
- Bitwarden Inc.verified
Reviews & malware reports(0)
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