tool
REvil S0496
- Type
- malware
- Platform
- Windows
- Created
- 4 August 2020
- Last modified
- 22 October 2025
REvil is a ransomware family that has been linked to the GOLD SOUTHFIELD group and operated as ransomware-as-a-service (RaaS) since at least April 2019. REvil, which as been used against organizations in the manufacturing, transportation, and electric sectors, is highly configurable and shares code similarities with the GandCrab RaaS.[1][2][3]
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0496
REvil can query the Registry to get random file extensions to append to encrypted files.5
REvil can save encryption parameters and system information in the Registry.678910
REvil has used encrypted strings and configuration files.11121314151617
REvil can exfiltrate host and malware information to C2 servers.19
Standing S0496
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
96th percentile · 96% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
94th percentile · 94% 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
75th percentile · 75% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Detection coverage S0496
1594 distinct rules cover the 35 techniques recorded for this tool. The 1783 technique-to-rule mappings resolve to 1594 distinct rules, because one rule can cover several techniques. 1000 Sigma · 594 Splunk.
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