Ryuk has called GetIpNetTable in attempt to identify all mounted drives and hosts that have Address Resolution Protocol (ARP) entries.45
tool
Ryuk S0446
- Type
- malware
- Platform
- Windows
- Created
- 13 May 2020
- Last modified
- 22 April 2025
Ryuk is a ransomware designed to target enterprise environments that has been used in attacks since at least 2018. Ryuk shares code similarities with Hermes ransomware.[1][2][3]
22
TechniquesTop 16%
10
TacticsTop 6%
2
Threat groupsunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0446
Ryuk can use anti-disassembly and code transformation obfuscation techniques.7
Ryuk can create .dll files that actually contain a Rich Text File format document.8
Ryuk has constructed legitimate appearing installation folder paths by calling GetWindowsDirectoryW and then inserting a null byte at the fourth character of the path. For Windows Vista or higher, the path would appear as C:\Users\Public.9
Ryuk can remotely create a scheduled task to execute itself on a system.10
Standing S0446
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
Techniques22Top 16%
84th percentile · 84% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics10Top 6%
94th percentile · 94% of 825 ATT&CK software entries have this many tactics spanned or fewer.
Threat groups261% 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 / technique28med71st pct
71st percentile · 71% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique8.5med
Detection coverage S0446
984 distinct rules cover the 22 techniques recorded for this tool. The 1025 technique-to-rule mappings resolve to 984 distinct rules, because one rule can cover several techniques. 663 Sigma · 321 Splunk.
20 covered by at least one rule2 with no coverage984 distinct rules in total
tf
Loading...Drag headers to reorder | Drag edges to resize
tf
Loading detections...
| Select | Title | Description | Category | Status | Event | Product | MITRE ATT&CK | CVEs | Severity | Author | Created | Updated | ID | Refs |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
© 2026 The MITRE Corporation. ATT&CK® and D3FEND™ data reproduced with permission. SigmaHQ detection rules licensed under DRL 1.1. attack.mitre.org · d3fend.mitre.org · CAR analytics licensed under Apache 2.0 · car.mitre.org