GridinSoft Threat Intelligence
core.efi threat report
GridinSoft Anti-Malware detection
Detected by GridinSoft before you download
The current ThreatInfo record shows this exact file hash detected as Trojan.ExtHeur!. 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
- Trojan.ExtHeur!
- Recommended action
- Scan and remove
- Last analysis
- 2026-05-23 05:00:31 (4 days ago)
- File hash
- 8d4fcd943bee7d4278f66508892d792b
Why it matters
Why GridinSoft flags this file
GridinSoft identifies the sample as Trojan.ExtHeur!, part of the Trojan threat category.
Malware disguised as legitimate software or delivered through deceptive packaging. Related Trojan reports help compare this file with nearby detections, publishers, and hashes.
First seen 2026-05-23 05:00:31 (4 days ago); latest analysis 2026-05-23 05:00:31 (4 days ago).
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 Trojan category for related samples and common context.
File context
core.efi is a Windows file recorded in the ThreatInfo database. The current detection status is Trojan.ExtHeur!, based on the latest analysis from 2026-05-23 05:00:31 (4 days ago). ThreatInfo groups this verdict with Trojan reports for broader family-level investigation.
If core.efi 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 Trojan.ExtHeur!.
File Details
| MD5: | 8d4fcd943bee7d4278f66508892d792b |
| Size: | 148 KB |
| First Published: | 2026-05-23 05:00:31 (4 days ago) |
| Latest Published: | 2026-05-23 05:00:31 (4 days ago) |
| Status: | Trojan.ExtHeur! (on last analysis) | |
| Analysis Date: | 2026-05-23 05:00:31 (4 days 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:
| %sysdrive%\boot\grub |
ThreatInfo has observed core.efi 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 core.efi across 1 countries. Use this signal to compare local evidence with where the sample is most often reported.
The strongest geographic signal for this file is Argentina with 100.0% 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 core.efi 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
core.efi is identified as pe for 64-bit systems. 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.
126f94a2ec150b89707d821cbcc4fea5
a728cfe93900252bc880ba177e5b63ff
59190060a46dbe1db35f9c6f2e7ec334
67b3fc99f5fd5456b0efc7b02923ebd4
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 Trojan.ExtHeur!
This report identifies core.efi by MD5 8d4fcd943bee7d4278f66508892d792b. It is part of the Trojan 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.