malware
Trojan.Mebromi is BIOS-level malware that takes control of the victim before MBR. [1]
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
Trojan.Mebromi performs BIOS modification and can download and execute a file as well as protect itself from removal.2
Reach is how much of ATT&CK this malware touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 825 ATT&CK software entries only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.
5th percentile · 95% of 825 ATT&CK software entries have more Enterprise techniques.
12th percentile · 88% of 825 ATT&CK software entries have more tactics spanned.
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.
8th percentile · 92% of 825 ATT&CK software entries have more detection rules per technique.
6 distinct rules cover the 1 technique recorded for this malware. 4 Splunk · 2 Sigma.
| Select | Title | Description | Category | Status | Event | OS | Product | MITRE ATT&CK | CVEs | Severity | Author | Created | Updated | ID | Refs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Splunk | The following analytic detects file deletions in the EFI boot directory. (...) | Generic | stable | file_event | linux | Sysmon | medium | Raven Tait, Splunk | 2026-07-08 | 2026-07-08 | 818a63f8-f2e1-4d1b-ac95-3a4f2ec7f113 | ||||
Splunk | The following analytic detects processes modifying data in the EFI volume on Linux. (...) | Generic | stable | process_creation | linux | Sysmon | medium | Raven Tait, Nasreddine Bencherchali, Splunk | 2026-07-08 | 2026-07-08 | 97fd4330-bd47-4742-abaf-c877d404822a | ||||
Detects creation of a file named "wpbbin" in the "%systemroot%\system32\" directory. (...) | Generic | test | file_event | windows | Sysmon | - | high | Nasreddine Bencherchali (Nextron Systems) | 2022-07-18 | — | e94b9ddc-eec5-4bb8-8a58-b9dc5f4e185f | ||||
Detects execution of the binary "wpbbin" which is used as part of the UEFI based persistence method (...) | Generic | test | process_creation | windows | Sysmon · WinEventLog Security | - | high | Nasreddine Bencherchali (Nextron Systems) | 2022-07-18 | — | 4abc0ec4-db5a-412f-9632-26659cddf145 | ||||
Splunk | The following analytic identifies the bootloader paths on Windows endpoints. (...) | Hunting | experimental | - | - | - | medium | Michael Haag, Splunk | 2023-04-14 | 2026-05-13 | 4f7e3913-4db3-4ccd-afe4-31198982305d | ||||
Splunk | Detects data files in the EFI volume. (...) | Generic | stable | file_event | windows | Sysmon | medium | Raven Tait, Splunk | 2026-05-05 | 2026-05-13 | 4000d728-faaf-44d4-969b-12216f2879e1 |
5th percentile · 95% of 825 ATT&CK software entries have more atomic tests per technique.
54% of the population shares a single value across only 11 distinct values, so a percentile here would rank the tie, not the entity.
97th percentile · 97% of 825 ATT&CK software entries have this many mitigations per technique or fewer.
5 of 8 axes carry an honest rank on this page. Coverage medians are taken across this malware’s 1 Enterprise technique.
Technique Campaign use over its cumulative rule count.