LoJax is a UEFI BIOS rootkit deployed to persist remote access software on some targeted systems.2
tool
LoJax S0397
- Type
- malware
- Platform
- Windows
- Created
- 2 July 2019
- Last modified
- 25 April 2025
5
TechniquesBottom 23%
4
Tactics32nd pct
1
Threat groupunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0397
LoJax has modified the Registry key ‘HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\BootExecute’ from ‘autocheck autochk *’ to ‘autocheck autoche *’.3
LoJax is a UEFI BIOS rootkit deployed to persist remote access software on some targeted systems.4
LoJax has modified the Registry key ‘HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\BootExecute’ from ‘autocheck autochk *’ to ‘autocheck autoche *’ in order to execute its payload during Windows startup.5
LoJax has loaded an embedded NTFS DXE driver to be able to access and write to NTFS partitions.6
Standing S0397
Reach is how much of ATT&CK this tool 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.
Reach
Techniques5Bottom 23%
23rd percentile · 77% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics432nd pct
32nd percentile · 68% of 825 ATT&CK software entries have more tactics spanned.
Threat group161% tie · 22 values
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
Campaigns085% tie · 8 values
85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique29medTop 25%
75th percentile · 75% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique5med
Detection coverage S0397
260 distinct rules cover the 5 techniques recorded for this tool. The 262 technique-to-rule mappings resolve to 260 distinct rules, because one rule can cover several techniques. 160 Sigma · 100 Splunk.
5 covered by at least one rule260 distinct rules in total
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