GridinSoft Threat Intelligence
INSTB64.SYS threat report
GridinSoft Anti-Malware detection
Detected by GridinSoft before you download
The current ThreatInfo record shows this exact file hash detected as Suspicious Object. 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
- Suspicious Object
- Recommended action
- Scan and remove
- Last analysis
- 2024-11-26 23:01:05 (a year ago)
- File hash
- 66ec27338cd74be7205288ce1702cbcb
Why it matters
Why GridinSoft flags this file
GridinSoft identifies the sample as Suspicious Object.
First seen 2022-08-30 23:50:36 (3 years ago); latest analysis 2024-11-26 23:01:05 (a year ago).
Signed by Absolute Software Corp.. The signature is reported as valid, but signed files can still be bundled or abused.
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.
File context
INSTB64.SYS is a Windows file recorded in the ThreatInfo database. The current detection status is Suspicious Object, based on the latest analysis from 2024-11-26 23:01:05 (a year ago).
If INSTB64.SYS 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 Suspicious Object.
File Details
| MD5: | 66ec27338cd74be7205288ce1702cbcb |
| Size: | 16 KB |
| First Published: | 2022-08-30 23:50:36 (3 years ago) |
| Latest Published: | 2024-11-26 23:01:05 (a year ago) |
| Status: | Suspicious Object (on last analysis) | |
| Analysis Date: | 2024-11-26 23:01:05 (a year 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.
Overview
| Signed By: | Absolute Software Corp. |
| Status: | Valid |
The signature on INSTB64.SYS is reported as valid. A valid signature helps confirm publisher identity, but it does not automatically make the file safe if the installer was bundled, abused, or downloaded from an untrusted source.
Common Places:
| %windir% |
ThreatInfo has observed INSTB64.SYS 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 INSTB64.SYS across 2 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is United States with 66.7% 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 INSTB64.SYS is Windows 10 with 60.0% 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
INSTB64.SYS is identified as pe for 64-bit systems. The subsystem is Native. 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.
b6ef7264ab9001a3a3075758caee6764
0d9cd0b51b27bcac39c05b478e4d6e9f
a20b84b8aac84e3ebdc62409d48e9f15
e09c4308db958c4755d83207128efcda
f412ce47d1128aeadf81225db3d09060
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 Suspicious Object
This report identifies INSTB64.SYS by MD5 66ec27338cd74be7205288ce1702cbcb. If the same file is present on your device, scan the system and remove the detected object after confirming the hash and location.