Ruler can be used to enumerate Exchange users and dump the GAL.3
tool
Ruler S0358
- Type
- tool
- Platforms
- Windows, Office Suite
- Created
- 4 February 2019
- Last modified
- 25 April 2025
Ruler is a tool to abuse Microsoft Exchange services. It is publicly available on GitHub and the tool is executed via the command line. The creators of Ruler have also released a defensive tool, NotRuler, to detect its usage.[1][2]
4
TechniquesBottom 17%
2
TacticsBottom 12%
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 S0358
Standing S0358
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
Techniques4Bottom 17%
17th percentile · 83% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics2Bottom 12%
12th percentile · 88% 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 / technique0medBottom 1%
1st percentile · 99% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique0.5med
Detection coverage S0358
1 distinct rule cover the 4 techniques recorded for this tool. 1 Sigma.
1 covered by at least one rule3 with no coverage1 distinct rules in total
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