Derusbi uses a backup communication method with an HTTP beacon.4
tool
Derusbi S0021
- Type
- malware
- Platforms
- Windows, Linux
- Created
- 31 May 2017
- Last modified
- 16 April 2025
Derusbi is malware used by multiple Chinese APT groups.[1][2] Both Windows and Linux variants have been observed.[3]
18
TechniquesTop 25%
7
Tactics68th pct
4
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 S0021
Derusbi is capable of enumerating Registry keys and values.5
A Linux version of Derusbi checks if the victim user ID is anything other than zero (normally used for root), and the malware will not execute if it does not have root privileges. Derusbi also gathers the username of the victim.6
Derusbi injects itself into the secure shell (SSH) process.7
Standing S0021
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
Techniques18Top 25%
75th percentile · 75% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics768th pct
68th percentile · 68% of 825 ATT&CK software entries have this many tactics spanned or fewer.
Threat groups461% 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 / technique11medBottom 18%
18th percentile · 82% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique6.5med
Detection coverage S0021
309 distinct rules cover the 18 techniques recorded for this tool. The 324 technique-to-rule mappings resolve to 309 distinct rules, because one rule can cover several techniques. 205 Sigma · 104 Splunk.
17 covered by at least one rule1 with no coverage309 distinct rules in total
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