Safe
Unsigned but long-established installer with zero engine detections and clean sandbox behaviour.
831cdab883af3765d2…1891f9df1eThe reasoning behind this verdict
The MT AI Engine weighs every signal from this scan — antivirus detections, sandbox behaviour, code signing, prevalence and historical matches — to reach a single, evidence-based verdict.
Zero detections from 66 reporting engines, including 16 tier-1 engines, combined with common_old prevalence strongly indicate a legitimate commodity installer. Sandbox analysis returned no malicious verdicts and no malicious dropped children. The observed MITRE techniques are consistent with normal installer or .NET runtime activity rather than confirmed malicious intent.
Each signal cites a concrete token from the evidence the arbiter saw — engine name, MITRE technique, signer string, or an exact count.
engines: 0 malicious across 66 reporting engines (tier1ReportedClean=16)
prevalence: common_old (148 uniqueSources)
behaviour: hasMaliciousSandboxVerdict=false and droppedChildren.rollup.malicious=0
filenameAnalysis.hasInstallerHint=true with no adversarialInputFlags
- Zero engine detections across all tiers
- Established common_old prevalence
- Clean sandbox and child-file results
Treat as safe; the sample matches the profile of a long-standing benign installer.
What to do now
This file looks safe based on everything we checked.
This file is safe to use.
Good habit: only download files from the official website or an app store.
Keep your antivirus and Windows updates switched on so you stay protected.
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.
- 23.39.19.41
- 23.37.17.215
- 74.125.195.84
- 239.255.255.250
- 224.0.0.251
- 20.99.184.37
- 23.216.147.76
- 23.216.147.64
- 20.99.133.109
- 192.229.211.108
- http://go.microsoft.com/fwlink/?LinkID=252669&clcid=0x409
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\unins000.exe
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\Base.dll
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\Base.pdb
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\Bulk Edit Calendar Events.exe
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\Bulk Edit Calendar Events.exe.config
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\is-AM3FP.tmp
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\is-VU4LJ.tmp
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\is-R3JLS.tmp
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\is-NSK7I.tmp
- C:\Users\<USER>\AppData\Local\Programs\Bulk Edit Calendar Events\is-Q6AHA.tmp
- Local\RstrMgr3887CAB8-533F-4C85-B0DC-3E5639F8D511
- Local\RstrMgr-3887CAB8-533F-4C85-B0DC-3E5639F8D511-Session0000
- cversions.3.m
- \Sessions\1\BaseNamedObjects\Local\RstrMgr3887CAB8-533F-4C85-B0DC-3E5639F8D511
- \Sessions\1\BaseNamedObjects\Local\RstrMgr-3887CAB8-533F-4C85-B0DC-3E5639F8D511-Session0000
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- d6208ec0b686ee8f3c6a…21f0cbNever scannednever seen before
- 1d3ef8698281e7cf7371…ba1183Never scannednever seen before
- 1eb1f4ef88ff4dadd39d…862093Never scannednever seen before
- 0075284a197d553e1278…cd04d1Never scannednever seen before
- 66d467872a29707393aa…49327fNever scannednever seen before
- a39a3aefecc33b79403e…27d952Never scannednever seen before
- 3cadcb6b8a7335141c7c…d1c0d5Never scannednever seen before
- 8edb30929c11a4e5db2b…5df04aNever scannednever seen before
- b624949df8b0e3a6153f…6610f3Never scannednever seen before
- 4b121c60103934fbe995…4b6cd7Never scannednever seen before
YARA & heuristic rule matches
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\Explorer.EXESample contacted 16 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.
Evidence23.39.19.41 · 23.37.17.215 · 74.125.195.84
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 widely this file has been seen
Widely seen in the wild for a long time. High prior this is legitimate; isolated detections on common-old files are usually false positives.
Forensic fingerprint
- File name
- Bulk Edit Calendar Events setup [6.4].exe
- Size
- 43.14 MB
- MIME type
- (unknown)
- Detected type
- Win32 EXE
- SHA-256
- 831cdab883af3765d28995af53239364d44cfb0c929543bae90f991891f9df1e
- MD5
- 93e245b8b36a7f7162e75a5d20f22e42
- SHA-1
- a770e3d5e1105671e86dfbe7f959cf5bc522f3d0
- PE imphash
- e569e6f445d32ba23766ad67d1e3787f
- First seen (VT)
- 11/24/2022, 2:38:33 AM
- Last analysis (VT)
- 11/20/2025, 12:07:12 AM
- First scan (MalwareTips)
- 6/1/2026, 8:12:22 PM
- Last scan (MalwareTips)
- 6/1/2026, 8:12:22 PM
Safety FAQ
Common questions about Bulk Edit Calendar Events setup [6.4].exe, answered from the scan data above.
- Bulk Edit Calendar Events setup [6.4].exe appears safe. 76 of 76 antivirus engines report it clean. As a habit, only run files you downloaded from the official source, since attackers sometimes distribute trojanised copies of legitimate software under the same name.
- Bulk Edit Calendar Events setup [6.4].exe is a Windows executable program, about 43.1 MB. Our analysis found no threat indicators for it. A file's name can be reused by different files, so we identify it by its cryptographic hash (below).
- None — all 76 antivirus engines we queried report Bulk Edit Calendar Events setup [6.4].exe as clean. That's reassuring, though brand-new malware can briefly evade detection before vendors add signatures, so we also weigh the file's behaviour and reputation.
- The SHA-256 hash of Bulk Edit Calendar Events setup [6.4].exe is 831cdab883af3765d28995af53239364d44cfb0c929543bae90f991891f9df1e, and its MD5 is 93e245b8b36a7f7162e75a5d20f22e42. This hash is the file's unique fingerprint — two files with the same SHA-256 are identical. Use it to confirm you're looking at exactly this file (not just one with the same name) when comparing against antivirus databases or a download's published checksum.
- Based on this scan, yes — Bulk Edit Calendar Events setup [6.4].exe shows no threat indicators. The important caveat is source: make sure you downloaded it from the official website or a trusted store, because attackers sometimes distribute malware-laced copies under a legitimate file's name. If your own antivirus flags it while we report it clean, that is most often a false positive, but verify the source before overriding your antivirus.
- This report reflects the scan run on June 1, 2026. Because a file's hash never changes, the identity of Bulk Edit Calendar Events setup [6.4].exe is fixed — but antivirus coverage improves over time, so a file that looks clean today can pick up detections later (and vice-versa). If you need the latest picture, MalwareTips staff can re-run the analysis from scratch.
Reviews & malware reports(0)
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