GridinSoft Threat Intelligence
win32calc.exe threat report
GridinSoft Anti-Malware detection
Detected by GridinSoft before you download
The current ThreatInfo record shows this exact file hash detected as Hijack.Explorer. Download GridinSoft Anti-Malware to scan the device, confirm whether this file is present, and remove the detected object if it is found.
- Detection name
- Hijack.Explorer
- Recommended action
- Scan and remove
- Last analysis
- 2026-05-26 16:00:40 (a day ago)
- File hash
- b31a19ba38f110838119299b50517073
Why it matters
Why GridinSoft flags this file
GridinSoft identifies the sample as Hijack.Explorer, part of the Hijack threat category.
Browser, shortcut, proxy, or system-setting changes that redirect user activity. Related Hijack reports help compare this file with nearby detections, publishers, and hashes.
First seen 2020-12-30 03:06:38 (5 years ago); latest analysis 2026-05-26 16:00:40 (a day ago).
Company metadata: Microsoft Corporation. Product metadata: Microsoft® Windows® Operating System.
ThreatInfo has seen this file in user or system paths listed below. Unexpected locations increase the need for local verification.
Recommended action
What to do next
- Compare the MD5 above with the file found on the device.
- Check whether the file appears in the observed locations or under one of the alternate names.
- Run GridinSoft Anti-Malware to confirm the detection and remove the file if it is present. Review the Hijack category for related samples and common context.
File context
win32calc.exe is a Windows file recorded in the ThreatInfo database. It is associated with Microsoft® Windows® Operating System. The reported company name is Microsoft Corporation. The current detection status is Hijack.Explorer, based on the latest analysis from 2026-05-26 16:00:40 (a day ago). ThreatInfo groups this verdict with Hijack reports for broader family-level investigation.
If win32calc.exe appears on your computer unexpectedly, treat it as suspicious. Check its location, digital signature, and recent system changes before allowing it to run. A full anti-malware scan is recommended when this file is detected as Hijack.Explorer.
File Details
| Product Name: | Microsoft® Windows® Operating System |
| Company Name: | Microsoft Corporation |
| MD5: | b31a19ba38f110838119299b50517073 |
| Size: | 861 KB |
| First Published: | 2020-12-30 03:06:38 (5 years ago) |
| Latest Published: | 2026-05-26 16:00:40 (a day ago) |
| Status: | Hijack.Explorer (on last analysis) | |
| Analysis Date: | 2026-05-26 16:00:40 (a day ago) |
Detection screenshot
The screenshot is a visual record of a GridinSoft Anti-Malware detection for this sample. Use the hash and metadata above as the primary identifiers when comparing the file on your system.
Common Places:
| %system% |
ThreatInfo has observed win32calc.exe in the locations listed above. Files found in temporary folders, user profile folders, startup locations, or unusual application directories should be reviewed more carefully than files installed under a known program directory.
Geographic signal
Observed country distribution
ThreatInfo has seen win32calc.exe across 11 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is Russian Federation with 45.0% of observed hits. Geographic distribution can help identify targeted campaigns, regional software bundles, or where a file is most commonly reported.
OS Version:
The most common operating system signal for win32calc.exe is Windows 10 with 100.0% of observed hits. If your system differs from the common profile, check whether the file was introduced by a specific installer, archive, or removable device.
Analysis
win32calc.exe is identified as pe for 64-bit systems. The subsystem is Windows GUI. PE header values are useful for triage, especially when they do not match the expected publisher, product, or release timeline.
PE Sections:
Section layout highlights raw-size concentration, repeated names, packer markers, and hashes that can be compared across related samples.
7fa178542275a4b2cf6280f1532dfa62
653eb7af911492e15d2566d3076e5833
79f12db69d57bfc191c741df13854d51
a0ea6e413be00fd645a25ec45896778b
e1ecf7afc4e7857ccf43f1feab66b993
790c3de59ea9326fe5f274206266b634
5ee29eaf8ddb89068b13dead9e01e282
PE section names and hashes can reveal packing, injected resources, or unusual build artifacts. Sections with uncommon names, very large raw data, or hashes that differ from a trusted copy deserve additional review.
Report conclusion
GridinSoft detects this file as Hijack.Explorer
This report identifies win32calc.exe by MD5 b31a19ba38f110838119299b50517073. It is part of the Hijack report group. If the same file is present on your device, scan the system and remove the detected object after confirming the hash and location.