Winnti for Linux has used a modified copy of the open-source userland rootkit Azazel, named libxselinux.so, to hide the malware's operations and network activity.2
tool
Winnti for Linux S0430
- Type
- malware
- Platform
- Linux
- Created
- 29 April 2020
- Last modified
- 10 April 2024
Winnti for Linux is a trojan, seen since at least 2015, designed specifically for targeting Linux systems. Reporting indicates the winnti malware family is shared across a number of actors including Winnti Group. The Windows variant is tracked separately under Winnti for Windows.[1]
8
Techniques38th pct
3
TacticsBottom 21%
3
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 S0430
Winnti for Linux can encode its configuration file with single-byte XOR encoding.3
Winnti for Linux has used HTTP in outbound communications.4
Winnti for Linux has used ICMP, custom TCP, and UDP in outbound communications.5
Winnti for Linux has the ability to deploy modules directly from command and control (C2) servers, possibly for remote command execution, file exfiltration, and socks5 proxying on the infected host. 6
Winnti for Linux has decoded XOR encoded strings holding its configuration upon execution.7
Standing S0430
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
Techniques838th pct
38th percentile · 62% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics3Bottom 21%
21st percentile · 79% of 825 ATT&CK software entries have more tactics spanned.
Threat groups361% 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 / technique5.5medBottom 7%
7th percentile · 93% of 825 ATT&CK software entries have more detection rules per technique.
Tests / technique3.5med
Detection coverage S0430
215 distinct rules cover the 8 techniques recorded for this tool. The 218 technique-to-rule mappings resolve to 215 distinct rules, because one rule can cover several techniques. 151 Sigma · 64 Splunk.
6 covered by at least one rule2 with no coverage215 distinct rules in total
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