OInstall.exe threat report

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Analyst brief

What this report says

GridinSoft Anti-Malware detects OInstall.exe as Crack.KMS. The sample was last observed on 2026-05-19 14:00:31 (a week ago) / Office 2013-2019 C2R Install. This detection belongs to the Crack report group, where related files are organized by family-level behavior and prevalence.

This page combines the detection verdict with file identity, publisher metadata, alternate names, observed paths, geography, OS signals, and PE details so the report reads as a triage record rather than a standalone download page.

GridinSoft Anti-Malware detection

Detected by GridinSoft before you download

The current ThreatInfo record shows this exact file hash detected as Crack.KMS. 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

Crack.KMS

Recommended action

Scan and remove

Last analysis

2026-05-19 14:00:31 (a week ago)

File hash

e4a514f71bc9e329c641beb89343bcac

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Why it matters

Why GridinSoft flags this file

Detection

GridinSoft identifies the sample as Crack.KMS, part of the Crack threat category.

Category context

License bypass tools and modified installers that commonly arrive with unwanted payloads. Related Crack reports help compare this file with nearby detections, publishers, and hashes.

Timeline

First seen 2020-05-25 12:08:43 (6 years ago); latest analysis 2026-05-19 14:00:31 (a week ago).

Publisher context

Product metadata: Office 2013-2019 C2R Install.

Digital signature

Signed by WZTeam. The signature is not reported as trusted and valid, which can indicate tampering, repackaging, or copied publisher data.

Observed locations

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

1. Compare the MD5 above with the file found on the device.
2. Check whether the file appears in the observed locations or under one of the alternate names.
3. Run GridinSoft Anti-Malware to confirm the detection and remove the file if it is present. Review the Crack category for related samples and common context.

OInstall.exe is a Windows file recorded in the ThreatInfo database. It is associated with Office 2013-2019 C2R Install. The current detection status is Crack.KMS, based on the latest analysis from 2026-05-19 14:00:31 (a week ago). ThreatInfo groups this verdict with Crack reports for broader family-level investigation.

If OInstall.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 Crack.KMS.

File Details

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.

Overview

The signature on OInstall.exe is not reported as trusted and valid. Invalid or suspicious signature data can indicate tampering, repackaging, or an unrelated file using copied publisher information.

ThreatInfo has observed OInstall.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 OInstall.exe across 24 countries. Use this signal to compare local evidence with where the sample is most often reported.

Top country Iran, Islamic Republic of

Share 10.8%

Low High activity

The strongest geographic signal for this file is Iran, Islamic Republic of with 10.8% of observed hits. Geographic distribution can help identify targeted campaigns, regional software bundles, or where a file is most commonly reported.

The most common operating system signal for OInstall.exe is Windows 10 with 73.0% 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

OInstall.exe is identified as pe for 32-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 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 Crack.KMS

This report identifies OInstall.exe by MD5 e4a514f71bc9e329c641beb89343bcac. It is part of the Crack 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.

Download GridinSoft Anti-Malware Scan the device and confirm whether this exact hash is present. Check this hash on VirusTotal

Recommended next steps

• Compare the local file MD5 with e4a514f71bc9e329c641beb89343bcac.
• Check the file path, publisher, and signature against the details in this report.
• Run a GridinSoft scan and remove the object if the same hash is found. Use the Crack category to compare similar reports.