tool
Orz S0229
- Type
- malware
- Platform
- Windows
- Created
- 18 April 2018
- Last modified
- 16 April 2025
Orz is a custom JavaScript backdoor used by Leviathan. It was observed being used in 2014 as well as in August 2017 when it was dropped by Microsoft Publisher files. [1] [2]
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0229
Some Orz strings are base64 encoded, such as the embedded DLL known as MockDll.4
Some Orz versions have an embedded DLL known as MockDll that uses process hollowing and Regsvr32 to execute another payload.5
Orz can execute shell commands.7 Orz can execute commands with JavaScript.7
Orz can overwrite Registry settings to reduce its visibility on the victim.9
Standing S0229
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
57th percentile · 57% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
68th percentile · 68% of 825 ATT&CK software entries have this many tactics spanned or fewer.
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.
Coverage
71st percentile · 71% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Detection coverage S0229
641 distinct rules cover the 13 techniques recorded for this tool. The 671 technique-to-rule mappings resolve to 641 distinct rules, because one rule can cover several techniques. 451 Sigma · 190 Splunk.
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